./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/list-simple/dll2c_insert_unequal.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 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 16:42:43,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 16:42:43,373 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 16:42:43,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 16:42:43,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 16:42:43,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 16:42:43,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 16:42:43,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 16:42:43,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 16:42:43,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 16:42:43,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 16:42:43,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 16:42:43,396 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 16:42:43,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 16:42:43,396 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 16:42:43,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 16:42:43,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 16:42:43,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 16:42:43,397 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 16:42:43,398 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 16:42:43,398 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 16:42:43,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 16:42:43,399 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 16:42:43,399 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 16:42:43,399 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 16:42:43,400 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 16:42:43,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 16:42:43,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 16:42:43,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 16:42:43,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 16:42:43,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:42:43,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 16:42:43,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 16:42:43,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 16:42:43,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 16:42:43,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 16:42:43,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 16:42:43,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 16:42:43,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 16:42:43,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2023-11-22 16:42:43,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 16:42:43,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 16:42:43,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 16:42:43,603 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 16:42:43,604 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 16:42:43,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2c_insert_unequal.i [2023-11-22 16:42:44,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 16:42:44,889 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 16:42:44,889 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2c_insert_unequal.i [2023-11-22 16:42:44,906 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e89ad056/c3778302ccbe4af7957345d3b35bad05/FLAG2a81a2ff9 [2023-11-22 16:42:44,925 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e89ad056/c3778302ccbe4af7957345d3b35bad05 [2023-11-22 16:42:44,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 16:42:44,929 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 16:42:44,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 16:42:44,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 16:42:44,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 16:42:44,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:42:44" (1/1) ... [2023-11-22 16:42:44,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c16c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:44, skipping insertion in model container [2023-11-22 16:42:44,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:42:44" (1/1) ... [2023-11-22 16:42:44,981 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 16:42:45,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:42:45,285 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 16:42:45,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:42:45,353 INFO L206 MainTranslator]: Completed translation [2023-11-22 16:42:45,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45 WrapperNode [2023-11-22 16:42:45,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 16:42:45,355 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 16:42:45,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 16:42:45,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 16:42:45,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,399 INFO L138 Inliner]: procedures = 127, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 196 [2023-11-22 16:42:45,399 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 16:42:45,400 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 16:42:45,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 16:42:45,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 16:42:45,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,446 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,452 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 16:42:45,467 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 16:42:45,467 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 16:42:45,467 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 16:42:45,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (1/1) ... [2023-11-22 16:42:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:42:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:45,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 16:42:45,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 16:42:45,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 16:42:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 16:42:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-22 16:42:45,566 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-22 16:42:45,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-22 16:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 16:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 16:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-22 16:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-22 16:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 16:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-22 16:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 16:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 16:42:45,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 16:42:45,661 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 16:42:45,663 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 16:42:46,072 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 16:42:46,122 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 16:42:46,122 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-22 16:42:46,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:42:46 BoogieIcfgContainer [2023-11-22 16:42:46,123 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 16:42:46,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 16:42:46,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 16:42:46,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 16:42:46,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:42:44" (1/3) ... [2023-11-22 16:42:46,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342584d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:42:46, skipping insertion in model container [2023-11-22 16:42:46,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:42:45" (2/3) ... [2023-11-22 16:42:46,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2342584d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:42:46, skipping insertion in model container [2023-11-22 16:42:46,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:42:46" (3/3) ... [2023-11-22 16:42:46,131 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2023-11-22 16:42:46,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 16:42:46,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2023-11-22 16:42:46,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:42:46,195 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;@2ce15b68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:42:46,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-22 16:42:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 71 states have (on average 2.436619718309859) internal successors, (173), 153 states have internal predecessors, (173), 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) [2023-11-22 16:42:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 16:42:46,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:46,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 16:42:46,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash 314316090, now seen corresponding path program 1 times [2023-11-22 16:42:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:46,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131341225] [2023-11-22 16:42:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:42:46,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131341225] [2023-11-22 16:42:46,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131341225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:46,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:46,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 16:42:46,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642168713] [2023-11-22 16:42:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:42:46,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:42:46,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:42:46,465 INFO L87 Difference]: Start difference. First operand has 158 states, 71 states have (on average 2.436619718309859) internal successors, (173), 153 states have internal predecessors, (173), 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) 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) [2023-11-22 16:42:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:46,589 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2023-11-22 16:42:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:42:46,592 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 [2023-11-22 16:42:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:46,598 INFO L225 Difference]: With dead ends: 154 [2023-11-22 16:42:46,598 INFO L226 Difference]: Without dead ends: 152 [2023-11-22 16:42:46,600 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 [2023-11-22 16:42:46,602 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:46,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 223 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:42:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-22 16:42:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-22 16:42:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 69 states have (on average 2.3043478260869565) internal successors, (159), 147 states have internal predecessors, (159), 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) [2023-11-22 16:42:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2023-11-22 16:42:46,730 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 5 [2023-11-22 16:42:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:46,730 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2023-11-22 16:42:46,730 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) [2023-11-22 16:42:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2023-11-22 16:42:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-22 16:42:46,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:46,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-22 16:42:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 16:42:46,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:46,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 314316091, now seen corresponding path program 1 times [2023-11-22 16:42:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:46,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593386945] [2023-11-22 16:42:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:42:46,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593386945] [2023-11-22 16:42:46,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593386945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:46,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:46,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 16:42:46,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147597542] [2023-11-22 16:42:46,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:46,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:42:46,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:42:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:42:46,845 INFO L87 Difference]: Start difference. First operand 152 states and 165 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) [2023-11-22 16:42:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:46,953 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2023-11-22 16:42:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:42:46,954 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 [2023-11-22 16:42:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:46,957 INFO L225 Difference]: With dead ends: 149 [2023-11-22 16:42:46,957 INFO L226 Difference]: Without dead ends: 149 [2023-11-22 16:42:46,960 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 [2023-11-22 16:42:46,962 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:46,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 228 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:42:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-22 16:42:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-22 16:42:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 69 states have (on average 2.260869565217391) internal successors, (156), 144 states have internal predecessors, (156), 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) [2023-11-22 16:42:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2023-11-22 16:42:46,984 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 5 [2023-11-22 16:42:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:46,984 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2023-11-22 16:42:46,984 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) [2023-11-22 16:42:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2023-11-22 16:42:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-22 16:42:46,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:46,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 16:42:46,986 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:46,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1588858566, now seen corresponding path program 1 times [2023-11-22 16:42:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886019013] [2023-11-22 16:42:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:42:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:47,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886019013] [2023-11-22 16:42:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886019013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:47,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 16:42:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075027311] [2023-11-22 16:42:47,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:47,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:42:47,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:42:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:42:47,094 INFO L87 Difference]: Start difference. First operand 149 states and 162 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) [2023-11-22 16:42:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:47,224 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2023-11-22 16:42:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:42:47,226 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 [2023-11-22 16:42:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:47,230 INFO L225 Difference]: With dead ends: 160 [2023-11-22 16:42:47,230 INFO L226 Difference]: Without dead ends: 160 [2023-11-22 16:42:47,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:42:47,235 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 10 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:47,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 327 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:42:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-22 16:42:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2023-11-22 16:42:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 70 states have (on average 2.242857142857143) internal successors, (157), 145 states have internal predecessors, (157), 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) [2023-11-22 16:42:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2023-11-22 16:42:47,257 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 11 [2023-11-22 16:42:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2023-11-22 16:42:47,258 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) [2023-11-22 16:42:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2023-11-22 16:42:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-22 16:42:47,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:47,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 16:42:47,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:47,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -856336920, now seen corresponding path program 1 times [2023-11-22 16:42:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:47,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075126024] [2023-11-22 16:42:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:42:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075126024] [2023-11-22 16:42:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075126024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 16:42:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382257723] [2023-11-22 16:42:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:42:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:42:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:42:47,399 INFO L87 Difference]: Start difference. First operand 150 states and 163 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) [2023-11-22 16:42:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:47,660 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2023-11-22 16:42:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:42:47,660 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 [2023-11-22 16:42:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:47,661 INFO L225 Difference]: With dead ends: 149 [2023-11-22 16:42:47,661 INFO L226 Difference]: Without dead ends: 149 [2023-11-22 16:42:47,661 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 [2023-11-22 16:42:47,662 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 9 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:47,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 476 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:42:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-22 16:42:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-22 16:42:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 70 states have (on average 2.2285714285714286) internal successors, (156), 144 states have internal predecessors, (156), 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) [2023-11-22 16:42:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2023-11-22 16:42:47,666 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 19 [2023-11-22 16:42:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:47,667 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2023-11-22 16:42:47,667 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) [2023-11-22 16:42:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2023-11-22 16:42:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-22 16:42:47,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:47,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 16:42:47,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:47,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash -856336919, now seen corresponding path program 1 times [2023-11-22 16:42:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632418522] [2023-11-22 16:42:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632418522] [2023-11-22 16:42:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632418522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:47,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:47,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 16:42:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213278064] [2023-11-22 16:42:47,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:42:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:42:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:42:47,905 INFO L87 Difference]: Start difference. First operand 149 states and 162 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) [2023-11-22 16:42:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:48,150 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2023-11-22 16:42:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:42:48,151 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 [2023-11-22 16:42:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:48,151 INFO L225 Difference]: With dead ends: 148 [2023-11-22 16:42:48,151 INFO L226 Difference]: Without dead ends: 148 [2023-11-22 16:42:48,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:42:48,152 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 7 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:48,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 500 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:42:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-22 16:42:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-11-22 16:42:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 143 states have internal predecessors, (155), 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) [2023-11-22 16:42:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions. [2023-11-22 16:42:48,155 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 19 [2023-11-22 16:42:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:48,156 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 161 transitions. [2023-11-22 16:42:48,156 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) [2023-11-22 16:42:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions. [2023-11-22 16:42:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-22 16:42:48,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:48,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 16:42:48,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1693940425, now seen corresponding path program 1 times [2023-11-22 16:42:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750184048] [2023-11-22 16:42:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:48,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:48,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750184048] [2023-11-22 16:42:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750184048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95153417] [2023-11-22 16:42:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:48,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 16:42:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:48,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 16:42:48,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:48,626 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 [2023-11-22 16:42:48,663 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 [2023-11-22 16:42:48,723 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-22 16:42:48,724 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 [2023-11-22 16:42:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-22 16:42:48,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95153417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:48,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:42:48,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-22 16:42:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480996118] [2023-11-22 16:42:48,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:48,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 16:42:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 16:42:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-22 16:42:48,805 INFO L87 Difference]: Start difference. First operand 148 states and 161 transitions. Second operand has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:49,108 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2023-11-22 16:42:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:42:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-22 16:42:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:49,110 INFO L225 Difference]: With dead ends: 155 [2023-11-22 16:42:49,110 INFO L226 Difference]: Without dead ends: 155 [2023-11-22 16:42:49,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-22 16:42:49,111 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:49,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 494 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 462 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2023-11-22 16:42:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-22 16:42:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2023-11-22 16:42:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 74 states have (on average 2.175675675675676) internal successors, (161), 147 states have internal predecessors, (161), 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) [2023-11-22 16:42:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 169 transitions. [2023-11-22 16:42:49,116 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 169 transitions. Word has length 21 [2023-11-22 16:42:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:49,116 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 169 transitions. [2023-11-22 16:42:49,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 169 transitions. [2023-11-22 16:42:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-22 16:42:49,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:49,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:49,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 16:42:49,329 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 [2023-11-22 16:42:49,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:49,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1693940426, now seen corresponding path program 1 times [2023-11-22 16:42:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782702269] [2023-11-22 16:42:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:49,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:49,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782702269] [2023-11-22 16:42:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782702269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326872540] [2023-11-22 16:42:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:49,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:49,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:49,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 16:42:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:49,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-22 16:42:49,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:49,787 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 [2023-11-22 16:42:49,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 16:42:49,864 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 [2023-11-22 16:42:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:49,900 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 [2023-11-22 16:42:49,905 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 16:42:49,905 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 [2023-11-22 16:42:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-22 16:42:49,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326872540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:49,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:42:49,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2023-11-22 16:42:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459514070] [2023-11-22 16:42:50,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 16:42:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:50,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 16:42:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2023-11-22 16:42:50,001 INFO L87 Difference]: Start difference. First operand 153 states and 169 transitions. Second operand has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:50,481 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2023-11-22 16:42:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 16:42:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-22 16:42:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:50,482 INFO L225 Difference]: With dead ends: 155 [2023-11-22 16:42:50,482 INFO L226 Difference]: Without dead ends: 155 [2023-11-22 16:42:50,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-11-22 16:42:50,483 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 4 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:50,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 655 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 927 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2023-11-22 16:42:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-22 16:42:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2023-11-22 16:42:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 147 states have internal predecessors, (160), 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) [2023-11-22 16:42:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2023-11-22 16:42:50,486 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 21 [2023-11-22 16:42:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:50,486 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2023-11-22 16:42:50,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2023-11-22 16:42:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-22 16:42:50,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:50,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:50,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:50,699 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 [2023-11-22 16:42:50,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:50,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 84297375, now seen corresponding path program 1 times [2023-11-22 16:42:50,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:50,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576797230] [2023-11-22 16:42:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:50,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:50,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576797230] [2023-11-22 16:42:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576797230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756460647] [2023-11-22 16:42:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:50,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:50,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:50,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 16:42:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:50,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 16:42:50,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:50,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:50,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756460647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 16:42:50,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 16:42:50,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-22 16:42:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467932511] [2023-11-22 16:42:50,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:50,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:42:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:42:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:42:50,944 INFO L87 Difference]: Start difference. First operand 153 states and 168 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) [2023-11-22 16:42:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:51,096 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2023-11-22 16:42:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:42:51,097 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 [2023-11-22 16:42:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:51,097 INFO L225 Difference]: With dead ends: 154 [2023-11-22 16:42:51,097 INFO L226 Difference]: Without dead ends: 154 [2023-11-22 16:42:51,098 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 [2023-11-22 16:42:51,099 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 3 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:51,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 715 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:42:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-22 16:42:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2023-11-22 16:42:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 147 states have internal predecessors, (159), 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) [2023-11-22 16:42:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 167 transitions. [2023-11-22 16:42:51,102 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 167 transitions. Word has length 23 [2023-11-22 16:42:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:51,102 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 167 transitions. [2023-11-22 16:42:51,102 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) [2023-11-22 16:42:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 167 transitions. [2023-11-22 16:42:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 16:42:51,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:51,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:51,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:51,312 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 [2023-11-22 16:42:51,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:51,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1686529334, now seen corresponding path program 1 times [2023-11-22 16:42:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534019955] [2023-11-22 16:42:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:51,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 16:42:51,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:51,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534019955] [2023-11-22 16:42:51,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534019955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:51,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556747473] [2023-11-22 16:42:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:51,380 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:51,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 16:42:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:51,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-22 16:42:51,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:51,501 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 [2023-11-22 16:42:51,538 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 [2023-11-22 16:42:51,561 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-22 16:42:51,562 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 [2023-11-22 16:42:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-11-22 16:42:51,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556747473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:51,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:42:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-11-22 16:42:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243508695] [2023-11-22 16:42:51,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 16:42:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 16:42:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=89, Unknown=1, NotChecked=18, Total=132 [2023-11-22 16:42:51,614 INFO L87 Difference]: Start difference. First operand 153 states and 167 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) [2023-11-22 16:42:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:51,925 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2023-11-22 16:42:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 16:42:51,926 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 [2023-11-22 16:42:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:51,926 INFO L225 Difference]: With dead ends: 154 [2023-11-22 16:42:51,927 INFO L226 Difference]: Without dead ends: 154 [2023-11-22 16:42:51,927 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 [2023-11-22 16:42:51,927 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 13 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:51,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 601 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 641 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2023-11-22 16:42:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-22 16:42:51,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2023-11-22 16:42:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 74 states have (on average 2.135135135135135) internal successors, (158), 146 states have internal predecessors, (158), 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) [2023-11-22 16:42:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2023-11-22 16:42:51,930 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 24 [2023-11-22 16:42:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:51,930 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2023-11-22 16:42:51,930 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) [2023-11-22 16:42:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2023-11-22 16:42:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-22 16:42:51,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:51,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:51,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:52,136 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 [2023-11-22 16:42:52,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:52,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1686529333, now seen corresponding path program 1 times [2023-11-22 16:42:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021810905] [2023-11-22 16:42:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:52,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021810905] [2023-11-22 16:42:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021810905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:52,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139822880] [2023-11-22 16:42:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:52,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:52,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:52,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 16:42:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:52,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-22 16:42:52,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:52,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-22 16:42:52,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 16:42:52,531 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 [2023-11-22 16:42:52,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:52,550 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 [2023-11-22 16:42:52,556 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 16:42:52,556 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 [2023-11-22 16:42:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-22 16:42:52,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139822880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:52,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:42:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-22 16:42:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564079520] [2023-11-22 16:42:52,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-22 16:42:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-22 16:42:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-11-22 16:42:52,650 INFO L87 Difference]: Start difference. First operand 152 states and 166 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) [2023-11-22 16:42:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:53,015 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2023-11-22 16:42:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-22 16:42:53,016 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 [2023-11-22 16:42:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:53,017 INFO L225 Difference]: With dead ends: 169 [2023-11-22 16:42:53,018 INFO L226 Difference]: Without dead ends: 169 [2023-11-22 16:42:53,018 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 [2023-11-22 16:42:53,018 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 23 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:53,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 929 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 655 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2023-11-22 16:42:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-22 16:42:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2023-11-22 16:42:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 83 states have (on average 2.072289156626506) internal successors, (172), 155 states have internal predecessors, (172), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-22 16:42:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2023-11-22 16:42:53,021 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 24 [2023-11-22 16:42:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:53,022 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2023-11-22 16:42:53,022 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) [2023-11-22 16:42:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2023-11-22 16:42:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 16:42:53,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:53,022 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] [2023-11-22 16:42:53,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:53,232 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 [2023-11-22 16:42:53,233 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:53,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash -742801797, now seen corresponding path program 1 times [2023-11-22 16:42:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:53,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87599573] [2023-11-22 16:42:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:53,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:42:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87599573] [2023-11-22 16:42:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87599573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:53,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 16:42:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359423883] [2023-11-22 16:42:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:53,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 16:42:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 16:42:53,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:42:53,338 INFO L87 Difference]: Start difference. First operand 162 states and 182 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) [2023-11-22 16:42:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:53,594 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2023-11-22 16:42:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-22 16:42:53,595 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 [2023-11-22 16:42:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:53,595 INFO L225 Difference]: With dead ends: 163 [2023-11-22 16:42:53,595 INFO L226 Difference]: Without dead ends: 163 [2023-11-22 16:42:53,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-22 16:42:53,596 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 8 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:53,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 545 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:42:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-22 16:42:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-11-22 16:42:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 154 states have internal predecessors, (171), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-22 16:42:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2023-11-22 16:42:53,599 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 25 [2023-11-22 16:42:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:53,599 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2023-11-22 16:42:53,599 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) [2023-11-22 16:42:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2023-11-22 16:42:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 16:42:53,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:53,600 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] [2023-11-22 16:42:53,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 16:42:53,600 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:53,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -742801796, now seen corresponding path program 1 times [2023-11-22 16:42:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:53,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247778095] [2023-11-22 16:42:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:53,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:42:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:53,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247778095] [2023-11-22 16:42:53,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247778095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:53,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:53,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-22 16:42:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137115746] [2023-11-22 16:42:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:53,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-22 16:42:53,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-22 16:42:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:42:53,816 INFO L87 Difference]: Start difference. First operand 161 states and 181 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) [2023-11-22 16:42:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:54,066 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2023-11-22 16:42:54,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 16:42:54,066 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 [2023-11-22 16:42:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:54,067 INFO L225 Difference]: With dead ends: 160 [2023-11-22 16:42:54,067 INFO L226 Difference]: Without dead ends: 160 [2023-11-22 16:42:54,067 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 [2023-11-22 16:42:54,068 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 6 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:54,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 570 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 16:42:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-22 16:42:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-22 16:42:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 153 states have internal predecessors, (170), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-22 16:42:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2023-11-22 16:42:54,071 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 25 [2023-11-22 16:42:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:54,071 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2023-11-22 16:42:54,071 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) [2023-11-22 16:42:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2023-11-22 16:42:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 16:42:54,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:54,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-22 16:42:54,072 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:54,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 613033779, now seen corresponding path program 1 times [2023-11-22 16:42:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:54,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470096589] [2023-11-22 16:42:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:42:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:42:54,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470096589] [2023-11-22 16:42:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470096589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:54,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:42:54,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 16:42:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130543179] [2023-11-22 16:42:54,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:54,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:42:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:42:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:42:54,377 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:54,523 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2023-11-22 16:42:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:42:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-22 16:42:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:54,525 INFO L225 Difference]: With dead ends: 166 [2023-11-22 16:42:54,525 INFO L226 Difference]: Without dead ends: 166 [2023-11-22 16:42:54,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:42:54,526 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 175 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:54,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 185 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 16:42:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-22 16:42:54,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 149. [2023-11-22 16:42:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 142 states have internal predecessors, (159), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-22 16:42:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2023-11-22 16:42:54,528 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 34 [2023-11-22 16:42:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:54,529 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2023-11-22 16:42:54,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2023-11-22 16:42:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 16:42:54,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:54,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:54,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-22 16:42:54,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:54,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 613033780, now seen corresponding path program 1 times [2023-11-22 16:42:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606084180] [2023-11-22 16:42:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:54,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:42:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 16:42:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606084180] [2023-11-22 16:42:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606084180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209168723] [2023-11-22 16:42:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:55,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:55,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 16:42:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 16:42:55,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:55,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 16:42:55,211 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 [2023-11-22 16:42:55,227 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-22 16:42:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:55,276 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 [2023-11-22 16:42:55,293 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 [2023-11-22 16:42:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:55,323 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 [2023-11-22 16:42:55,363 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 [2023-11-22 16:42:55,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:55,392 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 [2023-11-22 16:42:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:42:55,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 16:42:55,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209168723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:55,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 16:42:55,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-22 16:42:55,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587279576] [2023-11-22 16:42:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:55,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:42:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:42:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2023-11-22 16:42:55,399 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:55,538 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2023-11-22 16:42:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:42:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-22 16:42:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:55,539 INFO L225 Difference]: With dead ends: 142 [2023-11-22 16:42:55,539 INFO L226 Difference]: Without dead ends: 142 [2023-11-22 16:42:55,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-22 16:42:55,540 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 51 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:55,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 279 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 231 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2023-11-22 16:42:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-22 16:42:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-22 16:42:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 83 states have (on average 1.8313253012048192) internal successors, (152), 135 states have internal predecessors, (152), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-22 16:42:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2023-11-22 16:42:55,542 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 34 [2023-11-22 16:42:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:55,542 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2023-11-22 16:42:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:42:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2023-11-22 16:42:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-22 16:42:55,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:55,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:55,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:55,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:55,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:55,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash 92958809, now seen corresponding path program 1 times [2023-11-22 16:42:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:55,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794628554] [2023-11-22 16:42:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:55,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-22 16:42:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-22 16:42:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794628554] [2023-11-22 16:42:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794628554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:55,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532827436] [2023-11-22 16:42:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:55,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:55,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:55,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 16:42:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:56,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 16:42:56,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 16:42:56,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 16:42:56,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532827436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:42:56,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 16:42:56,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-22 16:42:56,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383307904] [2023-11-22 16:42:56,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:42:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:42:56,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:42:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 16:42:56,027 INFO L87 Difference]: Start difference. First operand 142 states and 162 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) [2023-11-22 16:42:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:56,049 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2023-11-22 16:42:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:42:56,050 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 [2023-11-22 16:42:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:56,050 INFO L225 Difference]: With dead ends: 124 [2023-11-22 16:42:56,050 INFO L226 Difference]: Without dead ends: 124 [2023-11-22 16:42:56,052 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 [2023-11-22 16:42:56,052 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:56,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 229 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 16:42:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-22 16:42:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-22 16:42:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 119 states have internal predecessors, (129), 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) [2023-11-22 16:42:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2023-11-22 16:42:56,056 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 34 [2023-11-22 16:42:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:56,056 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2023-11-22 16:42:56,056 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) [2023-11-22 16:42:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2023-11-22 16:42:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 16:42:56,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:56,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:56,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:56,269 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:56,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash 715181196, now seen corresponding path program 1 times [2023-11-22 16:42:56,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:56,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875270288] [2023-11-22 16:42:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:56,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:56,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:56,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:42:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 16:42:56,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875270288] [2023-11-22 16:42:56,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875270288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:56,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573085614] [2023-11-22 16:42:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:56,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:56,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:56,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 16:42:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:57,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-22 16:42:57,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:57,056 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 [2023-11-22 16:42:57,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-22 16:42:57,202 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-22 16:42:57,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:42:57,212 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 18 treesize of output 13 [2023-11-22 16:42:57,221 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-22 16:42:57,222 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 23 treesize of output 24 [2023-11-22 16:42:57,246 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 17 treesize of output 9 [2023-11-22 16:42:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-11-22 16:42:57,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:42:57,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573085614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:57,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:42:57,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2023-11-22 16:42:57,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383380721] [2023-11-22 16:42:57,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:42:57,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-22 16:42:57,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:42:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-22 16:42:57,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=438, Unknown=1, NotChecked=42, Total=552 [2023-11-22 16:42:57,330 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 23 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 16:42:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:42:58,159 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2023-11-22 16:42:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 16:42:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-11-22 16:42:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:42:58,161 INFO L225 Difference]: With dead ends: 167 [2023-11-22 16:42:58,161 INFO L226 Difference]: Without dead ends: 167 [2023-11-22 16:42:58,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=749, Unknown=1, NotChecked=56, Total=930 [2023-11-22 16:42:58,162 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 240 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 16:42:58,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 829 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1345 Invalid, 0 Unknown, 180 Unchecked, 0.7s Time] [2023-11-22 16:42:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-22 16:42:58,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 131. [2023-11-22 16:42:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.896103896103896) internal successors, (146), 126 states have internal predecessors, (146), 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) [2023-11-22 16:42:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2023-11-22 16:42:58,165 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 36 [2023-11-22 16:42:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:42:58,166 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2023-11-22 16:42:58,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 16:42:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2023-11-22 16:42:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 16:42:58,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:42:58,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:42:58,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 16:42:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 16:42:58,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:42:58,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:42:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash 715181197, now seen corresponding path program 1 times [2023-11-22 16:42:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:42:58,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383669539] [2023-11-22 16:42:58,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:58,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:42:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:42:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:42:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:58,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:42:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:42:59,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:42:59,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383669539] [2023-11-22 16:42:59,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383669539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:42:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898347325] [2023-11-22 16:42:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:42:59,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:42:59,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:42:59,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:42:59,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 16:42:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:42:59,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-22 16:42:59,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:42:59,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-22 16:42:59,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-22 16:42:59,850 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 7 treesize of output 3 [2023-11-22 16:43:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:43:04,311 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 [2023-11-22 16:43:04,343 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-22 16:43:04,343 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 18 treesize of output 21 [2023-11-22 16:43:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:43:04,352 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 19 [2023-11-22 16:43:06,582 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 17 treesize of output 9 [2023-11-22 16:43:06,592 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 7 treesize of output 3 [2023-11-22 16:43:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 16:43:06,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 16:43:07,183 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_42| Int)) (or (< |c_#StackHeapBarrier| (+ |v_node_create_~temp~0#1.base_42| 1)) (forall ((v_ArrVal_2240 Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_42| v_ArrVal_2239) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|) 4) (select (store |c_#length| |v_node_create_~temp~0#1.base_42| v_ArrVal_2240) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_42| v_ArrVal_2238) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)))) (< v_ArrVal_2240 12))))) (forall ((|v_node_create_~temp~0#1.base_42| Int)) (or (< |c_#StackHeapBarrier| (+ |v_node_create_~temp~0#1.base_42| 1)) (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_42| v_ArrVal_2239) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)))))) is different from false [2023-11-22 16:43:07,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898347325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:43:07,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-22 16:43:07,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-11-22 16:43:07,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805047242] [2023-11-22 16:43:07,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-22 16:43:07,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-22 16:43:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:43:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-22 16:43:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=4, NotChecked=56, Total=930 [2023-11-22 16:43:07,189 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 28 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 24 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 16:43:11,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:16,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:20,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:25,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:27,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:35,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:39,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:41,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:48,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:51,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:53,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:43:57,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:00,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:03,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:05,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:08,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:11,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:15,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:18,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:22,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:25,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:28,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:31,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:35,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:39,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:41,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:44,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:47,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:49,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:52,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:55,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:44:57,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:00,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:03,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:06,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:09,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:12,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:14,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:17,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:20,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:22,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:25,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:27,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:30,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:34,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:38,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 16:45:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:45:43,209 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2023-11-22 16:45:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 16:45:43,210 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 24 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-11-22 16:45:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:45:43,211 INFO L225 Difference]: With dead ends: 163 [2023-11-22 16:45:43,211 INFO L226 Difference]: Without dead ends: 163 [2023-11-22 16:45:43,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=174, Invalid=1382, Unknown=8, NotChecked=76, Total=1640 [2023-11-22 16:45:43,214 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 417 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 7 mSolverCounterUnsat, 47 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 47 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.5s IncrementalHoareTripleChecker+Time [2023-11-22 16:45:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1008 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1444 Invalid, 47 Unknown, 0 Unchecked, 141.5s Time] [2023-11-22 16:45:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-22 16:45:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2023-11-22 16:45:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 77 states have (on average 1.87012987012987) internal successors, (144), 126 states have internal predecessors, (144), 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) [2023-11-22 16:45:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2023-11-22 16:45:43,217 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 36 [2023-11-22 16:45:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:45:43,217 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2023-11-22 16:45:43,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 24 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-22 16:45:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2023-11-22 16:45:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-22 16:45:43,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:45:43,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:45:43,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-22 16:45:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 16:45:43,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:45:43,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:45:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 695778989, now seen corresponding path program 1 times [2023-11-22 16:45:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:45:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024943947] [2023-11-22 16:45:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:45:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:45:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:44,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:45:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:45:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:44,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:45:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:45:44,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:45:44,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024943947] [2023-11-22 16:45:44,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024943947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:45:44,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:45:44,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 16:45:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519324477] [2023-11-22 16:45:44,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:45:44,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 16:45:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:45:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 16:45:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:45:44,145 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:45:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:45:47,514 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2023-11-22 16:45:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 16:45:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-11-22 16:45:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:45:47,516 INFO L225 Difference]: With dead ends: 128 [2023-11-22 16:45:47,516 INFO L226 Difference]: Without dead ends: 128 [2023-11-22 16:45:47,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 16:45:47,517 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 27 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-22 16:45:47,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 248 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-22 16:45:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-22 16:45:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2023-11-22 16:45:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 73 states have (on average 1.821917808219178) internal successors, (133), 122 states have internal predecessors, (133), 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) [2023-11-22 16:45:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2023-11-22 16:45:47,520 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 37 [2023-11-22 16:45:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:45:47,521 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2023-11-22 16:45:47,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:45:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2023-11-22 16:45:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-22 16:45:47,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:45:47,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:45:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-22 16:45:47,523 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:45:47,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:45:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 94589593, now seen corresponding path program 1 times [2023-11-22 16:45:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:45:47,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832613748] [2023-11-22 16:45:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:45:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:45:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:48,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:45:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:48,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:45:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:45:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:45:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:45:48,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832613748] [2023-11-22 16:45:48,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832613748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:45:48,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:45:48,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 16:45:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650954349] [2023-11-22 16:45:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:45:48,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-22 16:45:48,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:45:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-22 16:45:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-22 16:45:48,693 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:45:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:45:53,069 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2023-11-22 16:45:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:45:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-11-22 16:45:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:45:53,070 INFO L225 Difference]: With dead ends: 124 [2023-11-22 16:45:53,070 INFO L226 Difference]: Without dead ends: 124 [2023-11-22 16:45:53,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:45:53,071 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 152 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-22 16:45:53,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 306 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-22 16:45:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-22 16:45:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-22 16:45:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 119 states have internal predecessors, (129), 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) [2023-11-22 16:45:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2023-11-22 16:45:53,073 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 38 [2023-11-22 16:45:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:45:53,073 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2023-11-22 16:45:53,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:45:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2023-11-22 16:45:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 16:45:53,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:45:53,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:45:53,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-22 16:45:53,074 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:45:53,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:45:53,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1370856498, now seen corresponding path program 1 times [2023-11-22 16:45:53,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:45:53,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578560933] [2023-11-22 16:45:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:45:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:45:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:53,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:45:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:45:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:53,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:45:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:45:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 16:45:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:45:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578560933] [2023-11-22 16:45:54,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578560933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:45:54,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:45:54,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 16:45:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479403921] [2023-11-22 16:45:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:45:54,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:45:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:45:54,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:45:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:45:54,638 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:46:04,225 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2023-11-22 16:46:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:46:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-22 16:46:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:46:04,226 INFO L225 Difference]: With dead ends: 118 [2023-11-22 16:46:04,226 INFO L226 Difference]: Without dead ends: 118 [2023-11-22 16:46:04,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:46:04,227 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 35 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-22 16:46:04,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 348 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-22 16:46:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-22 16:46:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-22 16:46:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 113 states have internal predecessors, (123), 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) [2023-11-22 16:46:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2023-11-22 16:46:04,229 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 39 [2023-11-22 16:46:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:46:04,229 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2023-11-22 16:46:04,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2023-11-22 16:46:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 16:46:04,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:46:04,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:46:04,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-22 16:46:04,230 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:46:04,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:46:04,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1370856497, now seen corresponding path program 1 times [2023-11-22 16:46:04,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:46:04,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594001104] [2023-11-22 16:46:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:04,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:46:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:46:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:05,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:46:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:05,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:46:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:46:05,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:46:05,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594001104] [2023-11-22 16:46:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594001104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:46:05,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:46:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 16:46:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473172473] [2023-11-22 16:46:05,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:46:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:46:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:46:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:46:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:46:05,118 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:46:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:46:08,436 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-11-22 16:46:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 16:46:08,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-11-22 16:46:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:46:08,437 INFO L225 Difference]: With dead ends: 117 [2023-11-22 16:46:08,437 INFO L226 Difference]: Without dead ends: 117 [2023-11-22 16:46:08,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 16:46:08,438 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 107 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-22 16:46:08,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 258 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-22 16:46:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-22 16:46:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-22 16:46:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.704225352112676) internal successors, (121), 112 states have internal predecessors, (121), 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) [2023-11-22 16:46:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2023-11-22 16:46:08,448 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 39 [2023-11-22 16:46:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:46:08,448 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2023-11-22 16:46:08,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 16:46:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2023-11-22 16:46:08,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 16:46:08,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:46:08,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:46:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-22 16:46:08,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:46:08,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:46:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1362691520, now seen corresponding path program 1 times [2023-11-22 16:46:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:46:08,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030455498] [2023-11-22 16:46:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:46:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:09,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:46:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:09,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:46:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:09,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:46:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:46:09,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:46:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030455498] [2023-11-22 16:46:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030455498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:46:09,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:46:09,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 16:46:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519220918] [2023-11-22 16:46:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:46:09,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:46:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:46:09,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:46:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:46:09,350 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:46:15,049 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-11-22 16:46:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:46:15,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-22 16:46:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:46:15,050 INFO L225 Difference]: With dead ends: 117 [2023-11-22 16:46:15,050 INFO L226 Difference]: Without dead ends: 117 [2023-11-22 16:46:15,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-22 16:46:15,051 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-22 16:46:15,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 249 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-22 16:46:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-22 16:46:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-22 16:46:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.6901408450704225) internal successors, (120), 111 states have internal predecessors, (120), 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) [2023-11-22 16:46:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2023-11-22 16:46:15,056 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 39 [2023-11-22 16:46:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:46:15,056 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2023-11-22 16:46:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2023-11-22 16:46:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-22 16:46:15,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:46:15,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:46:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-22 16:46:15,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:46:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:46:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1362691519, now seen corresponding path program 1 times [2023-11-22 16:46:15,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:46:15,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379297146] [2023-11-22 16:46:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:46:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:16,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:46:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:16,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:46:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:16,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:46:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-22 16:46:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:46:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379297146] [2023-11-22 16:46:16,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379297146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:46:16,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:46:16,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 16:46:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044010596] [2023-11-22 16:46:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:46:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:46:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:46:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:46:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:46:16,213 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:46:21,968 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2023-11-22 16:46:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 16:46:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-22 16:46:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:46:21,969 INFO L225 Difference]: With dead ends: 115 [2023-11-22 16:46:21,969 INFO L226 Difference]: Without dead ends: 115 [2023-11-22 16:46:21,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:46:21,969 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-22 16:46:21,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-22 16:46:21,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-22 16:46:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-22 16:46:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.676056338028169) internal successors, (119), 110 states have internal predecessors, (119), 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) [2023-11-22 16:46:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2023-11-22 16:46:21,973 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 39 [2023-11-22 16:46:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:46:21,973 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2023-11-22 16:46:21,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2023-11-22 16:46:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-22 16:46:21,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:46:21,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:46:21,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-22 16:46:21,973 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:46:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:46:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash 706235880, now seen corresponding path program 1 times [2023-11-22 16:46:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:46:21,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770972951] [2023-11-22 16:46:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:46:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:23,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:46:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:23,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:46:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:46:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-22 16:46:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:46:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770972951] [2023-11-22 16:46:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770972951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:46:23,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:46:23,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-22 16:46:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768637754] [2023-11-22 16:46:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:46:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 16:46:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:46:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 16:46:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-22 16:46:23,886 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 16:46:32,675 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2023-11-22 16:46:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-22 16:46:32,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-11-22 16:46:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 16:46:32,676 INFO L225 Difference]: With dead ends: 109 [2023-11-22 16:46:32,676 INFO L226 Difference]: Without dead ends: 109 [2023-11-22 16:46:32,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-22 16:46:32,677 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 25 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-22 16:46:32,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 352 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-11-22 16:46:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-22 16:46:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-22 16:46:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.591549295774648) internal successors, (113), 104 states have internal predecessors, (113), 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) [2023-11-22 16:46:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2023-11-22 16:46:32,679 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 40 [2023-11-22 16:46:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 16:46:32,679 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2023-11-22 16:46:32,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 16:46:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2023-11-22 16:46:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-22 16:46:32,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 16:46:32,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:46:32,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-22 16:46:32,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-22 16:46:32,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:46:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 87848298, now seen corresponding path program 1 times [2023-11-22 16:46:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:46:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056299770] [2023-11-22 16:46:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:46:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-22 16:46:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:43,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 16:46:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:45,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 16:46:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:46:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:46:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056299770] [2023-11-22 16:46:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056299770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 16:46:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469923768] [2023-11-22 16:46:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:46:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 16:46:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:46:53,485 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 16:46:53,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 16:46:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:46:53,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-22 16:46:53,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 16:46:55,147 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 [2023-11-22 16:47:01,402 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 16:47:01,403 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 [2023-11-22 16:47:04,895 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 [2023-11-22 16:47:07,488 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-22 16:47:07,489 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 [2023-11-22 16:47:11,871 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-22 16:47:11,871 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 34 treesize of output 33 [2023-11-22 16:47:13,767 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 57 treesize of output 25 [2023-11-22 16:47:15,932 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-22 16:47:15,932 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2023-11-22 16:47:15,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 16:47:16,050 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 7 treesize of output 3 [2023-11-22 16:47:18,998 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-22 16:47:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 16:47:19,415 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-22 16:47:19,415 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 47 treesize of output 38 [2023-11-22 16:47:19,579 INFO L224 Elim1Store]: Index analysis took 106 ms Killed by 15