./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 11:02:27,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 11:02:27,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 11:02:27,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 11:02:27,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 11:02:27,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 11:02:27,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 11:02:27,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 11:02:27,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 11:02:27,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 11:02:27,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 11:02:27,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 11:02:27,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 11:02:27,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 11:02:27,954 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 11:02:27,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 11:02:27,954 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 11:02:27,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 11:02:27,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 11:02:27,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 11:02:27,957 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 11:02:27,957 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 11:02:27,957 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 11:02:27,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 11:02:27,958 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 11:02:27,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 11:02:27,959 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 11:02:27,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 11:02:27,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 11:02:27,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 11:02:27,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 11:02:27,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 11:02:27,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 11:02:27,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 11:02:27,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 11:02:27,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 11:02:27,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 11:02:27,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 11:02:27,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 11:02:27,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 11:02:27,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 11:02:27,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 11:02:27,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2024-10-13 11:02:28,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 11:02:28,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 11:02:28,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 11:02:28,236 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 11:02:28,237 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 11:02:28,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2024-10-13 11:02:29,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 11:02:30,021 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 11:02:30,022 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2024-10-13 11:02:30,033 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06dbdd68b/9a081b5cca01471cb0c0b810dd2494d3/FLAGab66b8d7d [2024-10-13 11:02:30,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06dbdd68b/9a081b5cca01471cb0c0b810dd2494d3 [2024-10-13 11:02:30,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 11:02:30,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 11:02:30,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 11:02:30,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 11:02:30,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 11:02:30,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f6bcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30, skipping insertion in model container [2024-10-13 11:02:30,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,109 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 11:02:30,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 11:02:30,434 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 11:02:30,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 11:02:30,494 INFO L204 MainTranslator]: Completed translation [2024-10-13 11:02:30,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30 WrapperNode [2024-10-13 11:02:30,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 11:02:30,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 11:02:30,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 11:02:30,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 11:02:30,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,531 INFO L138 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 111 [2024-10-13 11:02:30,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 11:02:30,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 11:02:30,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 11:02:30,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 11:02:30,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,559 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 7, 6]. 47 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-10-13 11:02:30,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,572 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 11:02:30,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 11:02:30,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 11:02:30,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 11:02:30,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (1/1) ... [2024-10-13 11:02:30,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 11:02:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:30,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 11:02:30,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 11:02:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-13 11:02:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-13 11:02:30,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-13 11:02:30,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-13 11:02:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 11:02:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 11:02:30,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 11:02:30,812 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 11:02:30,814 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 11:02:31,047 INFO L? ?]: Removed 83 outVars from TransFormulas that were not future-live. [2024-10-13 11:02:31,050 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 11:02:31,097 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 11:02:31,098 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 11:02:31,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:31 BoogieIcfgContainer [2024-10-13 11:02:31,098 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 11:02:31,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 11:02:31,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 11:02:31,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 11:02:31,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:02:30" (1/3) ... [2024-10-13 11:02:31,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670708a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:31, skipping insertion in model container [2024-10-13 11:02:31,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:02:30" (2/3) ... [2024-10-13 11:02:31,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670708a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:02:31, skipping insertion in model container [2024-10-13 11:02:31,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:02:31" (3/3) ... [2024-10-13 11:02:31,108 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2024-10-13 11:02:31,121 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 11:02:31,122 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-10-13 11:02:31,163 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 11:02:31,169 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a0d19b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 11:02:31,170 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-10-13 11:02:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 32 states have (on average 2.3125) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-13 11:02:31,179 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:31,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-13 11:02:31,180 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:31,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 5015013, now seen corresponding path program 1 times [2024-10-13 11:02:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167403137] [2024-10-13 11:02:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:31,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:31,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167403137] [2024-10-13 11:02:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167403137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:31,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:31,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 11:02:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211704570] [2024-10-13 11:02:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:31,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 11:02:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 11:02:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,398 INFO L87 Difference]: Start difference. First operand has 65 states, 32 states have (on average 2.3125) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:31,488 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2024-10-13 11:02:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 11:02:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-13 11:02:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:31,496 INFO L225 Difference]: With dead ends: 62 [2024-10-13 11:02:31,496 INFO L226 Difference]: Without dead ends: 60 [2024-10-13 11:02:31,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,502 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:31,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-13 11:02:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-13 11:02:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 30 states have (on average 2.1) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2024-10-13 11:02:31,529 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 4 [2024-10-13 11:02:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:31,529 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2024-10-13 11:02:31,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2024-10-13 11:02:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-13 11:02:31,530 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:31,530 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-13 11:02:31,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 11:02:31,531 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:31,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 5015014, now seen corresponding path program 1 times [2024-10-13 11:02:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:31,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549007862] [2024-10-13 11:02:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:31,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:31,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:31,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549007862] [2024-10-13 11:02:31,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549007862] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:31,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:31,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 11:02:31,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535926437] [2024-10-13 11:02:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:31,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 11:02:31,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 11:02:31,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,724 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:31,788 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-10-13 11:02:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 11:02:31,789 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-13 11:02:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:31,789 INFO L225 Difference]: With dead ends: 58 [2024-10-13 11:02:31,790 INFO L226 Difference]: Without dead ends: 58 [2024-10-13 11:02:31,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,792 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:31,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-13 11:02:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-13 11:02:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 2.033333333333333) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-10-13 11:02:31,801 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 4 [2024-10-13 11:02:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:31,801 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-10-13 11:02:31,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-10-13 11:02:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-13 11:02:31,802 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:31,802 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 11:02:31,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 11:02:31,803 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:31,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:31,806 INFO L85 PathProgramCache]: Analyzing trace with hash 155524909, now seen corresponding path program 1 times [2024-10-13 11:02:31,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:31,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510978248] [2024-10-13 11:02:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:31,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510978248] [2024-10-13 11:02:31,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510978248] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:31,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:31,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 11:02:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69722410] [2024-10-13 11:02:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:31,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 11:02:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 11:02:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,861 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:31,890 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2024-10-13 11:02:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 11:02:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-13 11:02:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:31,895 INFO L225 Difference]: With dead ends: 65 [2024-10-13 11:02:31,895 INFO L226 Difference]: Without dead ends: 65 [2024-10-13 11:02:31,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 11:02:31,896 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:31,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:02:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-13 11:02:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2024-10-13 11:02:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 2.0) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2024-10-13 11:02:31,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 5 [2024-10-13 11:02:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:31,904 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2024-10-13 11:02:31,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2024-10-13 11:02:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 11:02:31,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:31,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 11:02:31,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 11:02:31,906 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:31,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash 524463697, now seen corresponding path program 1 times [2024-10-13 11:02:31,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:31,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512783452] [2024-10-13 11:02:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:32,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512783452] [2024-10-13 11:02:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512783452] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:32,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 11:02:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743733519] [2024-10-13 11:02:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:32,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 11:02:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 11:02:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 11:02:32,004 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:32,097 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-10-13 11:02:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 11:02:32,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 11:02:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:32,098 INFO L225 Difference]: With dead ends: 58 [2024-10-13 11:02:32,098 INFO L226 Difference]: Without dead ends: 58 [2024-10-13 11:02:32,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 11:02:32,099 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:32,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-13 11:02:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-13 11:02:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.967741935483871) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2024-10-13 11:02:32,111 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 6 [2024-10-13 11:02:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:32,112 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2024-10-13 11:02:32,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2024-10-13 11:02:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 11:02:32,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:32,112 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 11:02:32,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 11:02:32,113 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:32,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:32,113 INFO L85 PathProgramCache]: Analyzing trace with hash 524463698, now seen corresponding path program 1 times [2024-10-13 11:02:32,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:32,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580679432] [2024-10-13 11:02:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:32,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580679432] [2024-10-13 11:02:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580679432] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:32,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:32,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 11:02:32,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123785207] [2024-10-13 11:02:32,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:32,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:02:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:02:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:32,215 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:32,273 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2024-10-13 11:02:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 11:02:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 11:02:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:32,274 INFO L225 Difference]: With dead ends: 57 [2024-10-13 11:02:32,274 INFO L226 Difference]: Without dead ends: 57 [2024-10-13 11:02:32,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:32,275 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:32,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 161 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-13 11:02:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-13 11:02:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.935483870967742) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-10-13 11:02:32,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 6 [2024-10-13 11:02:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:32,279 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-10-13 11:02:32,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-10-13 11:02:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 11:02:32,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:32,280 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:32,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 11:02:32,280 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:32,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1289820358, now seen corresponding path program 1 times [2024-10-13 11:02:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:32,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429755506] [2024-10-13 11:02:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:32,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:32,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429755506] [2024-10-13 11:02:32,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429755506] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:32,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467264549] [2024-10-13 11:02:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:32,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:32,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:32,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:32,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 11:02:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:32,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 11:02:32,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:32,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467264549] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:32,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:32,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-10-13 11:02:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605406202] [2024-10-13 11:02:32,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:32,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:02:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:02:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:32,474 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:32,499 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2024-10-13 11:02:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 11:02:32,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 11:02:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:32,500 INFO L225 Difference]: With dead ends: 62 [2024-10-13 11:02:32,500 INFO L226 Difference]: Without dead ends: 62 [2024-10-13 11:02:32,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:32,501 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:32,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 99 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:02:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-13 11:02:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-13 11:02:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2024-10-13 11:02:32,505 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 10 [2024-10-13 11:02:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:32,505 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2024-10-13 11:02:32,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2024-10-13 11:02:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 11:02:32,506 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:32,506 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 11:02:32,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:32,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 11:02:32,707 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:32,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -34720051, now seen corresponding path program 2 times [2024-10-13 11:02:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:32,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915871841] [2024-10-13 11:02:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:32,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915871841] [2024-10-13 11:02:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915871841] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 11:02:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338604292] [2024-10-13 11:02:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:32,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 11:02:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 11:02:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 11:02:32,822 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:32,845 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2024-10-13 11:02:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 11:02:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-13 11:02:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:32,846 INFO L225 Difference]: With dead ends: 102 [2024-10-13 11:02:32,846 INFO L226 Difference]: Without dead ends: 102 [2024-10-13 11:02:32,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 11:02:32,847 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 41 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:32,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 145 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:02:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-13 11:02:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 63. [2024-10-13 11:02:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2024-10-13 11:02:32,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 15 [2024-10-13 11:02:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:32,855 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2024-10-13 11:02:32,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2024-10-13 11:02:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 11:02:32,855 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:32,855 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 11:02:32,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 11:02:32,856 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:32,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash -34720051, now seen corresponding path program 1 times [2024-10-13 11:02:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:32,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367941225] [2024-10-13 11:02:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 11:02:33,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367941225] [2024-10-13 11:02:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367941225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975026135] [2024-10-13 11:02:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:33,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:33,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:33,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:33,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 11:02:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:33,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 11:02:33,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:33,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 11:02:33,162 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 11:02:33,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 11:02:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:02:33,250 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 [2024-10-13 11:02:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:33,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:35,234 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_24| Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_25| Int) (v_ArrVal_215 Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_~temp~0#1.base_24| 1)) (= (select (store (store |c_#valid| |v_ULTIMATE.start_node_create_~temp~0#1.base_25| 1) |v_ULTIMATE.start_node_create_~temp~0#1.base_24| v_ArrVal_215) |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) is different from false [2024-10-13 11:02:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-13 11:02:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975026135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:35,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:35,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-10-13 11:02:35,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178774056] [2024-10-13 11:02:35,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:35,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 11:02:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:35,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 11:02:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=132, Unknown=1, NotChecked=24, Total=210 [2024-10-13 11:02:35,242 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:35,455 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2024-10-13 11:02:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 11:02:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-13 11:02:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:35,457 INFO L225 Difference]: With dead ends: 93 [2024-10-13 11:02:35,457 INFO L226 Difference]: Without dead ends: 93 [2024-10-13 11:02:35,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=165, Unknown=1, NotChecked=28, Total=272 [2024-10-13 11:02:35,457 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 283 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:35,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 135 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 211 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2024-10-13 11:02:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-10-13 11:02:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2024-10-13 11:02:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.736842105263158) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2024-10-13 11:02:35,461 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 15 [2024-10-13 11:02:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:35,461 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2024-10-13 11:02:35,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2024-10-13 11:02:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-13 11:02:35,462 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:35,462 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 11:02:35,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 11:02:35,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-13 11:02:35,666 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:35,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -34720050, now seen corresponding path program 1 times [2024-10-13 11:02:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:35,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896709118] [2024-10-13 11:02:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:35,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:36,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896709118] [2024-10-13 11:02:36,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896709118] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:36,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610860307] [2024-10-13 11:02:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:36,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:36,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:36,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:36,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 11:02:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:36,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 11:02:36,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:36,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 11:02:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:02:36,166 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 [2024-10-13 11:02:36,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:02:36,201 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 [2024-10-13 11:02:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:36,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:40,454 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_27| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_~temp~0#1.base_27| 1)) (forall ((v_ArrVal_301 Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_26| Int)) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_node_create_~temp~0#1.base_26| 1)) (forall ((v_ArrVal_302 Int)) (<= (+ |c_ULTIMATE.start_main_~#s~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_node_create_~temp~0#1.base_27| v_ArrVal_301) |v_ULTIMATE.start_node_create_~temp~0#1.base_26| v_ArrVal_302) |c_ULTIMATE.start_main_~#s~0#1.base|))))))) (<= 0 |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from false [2024-10-13 11:02:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-10-13 11:02:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610860307] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:40,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 10 [2024-10-13 11:02:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433557679] [2024-10-13 11:02:40,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:40,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 11:02:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 11:02:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=75, Unknown=1, NotChecked=18, Total=132 [2024-10-13 11:02:40,460 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:40,728 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2024-10-13 11:02:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 11:02:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-13 11:02:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:40,729 INFO L225 Difference]: With dead ends: 85 [2024-10-13 11:02:40,729 INFO L226 Difference]: Without dead ends: 85 [2024-10-13 11:02:40,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=65, Invalid=120, Unknown=1, NotChecked=24, Total=210 [2024-10-13 11:02:40,730 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:40,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 83 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2024-10-13 11:02:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-13 11:02:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 57. [2024-10-13 11:02:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-10-13 11:02:40,746 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 15 [2024-10-13 11:02:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:40,746 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-10-13 11:02:40,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-10-13 11:02:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 11:02:40,747 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:40,747 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:40,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:40,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:40,948 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:40,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1076321561, now seen corresponding path program 1 times [2024-10-13 11:02:40,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:40,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276832202] [2024-10-13 11:02:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:02:41,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:41,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276832202] [2024-10-13 11:02:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276832202] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:41,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 11:02:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594311417] [2024-10-13 11:02:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:41,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 11:02:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 11:02:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-13 11:02:41,241 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:41,425 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2024-10-13 11:02:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 11:02:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 11:02:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:41,426 INFO L225 Difference]: With dead ends: 84 [2024-10-13 11:02:41,426 INFO L226 Difference]: Without dead ends: 84 [2024-10-13 11:02:41,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:02:41,430 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:41,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 113 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 11:02:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-13 11:02:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2024-10-13 11:02:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-10-13 11:02:41,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 16 [2024-10-13 11:02:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:41,435 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-10-13 11:02:41,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-10-13 11:02:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 11:02:41,435 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:41,439 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:41,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 11:02:41,439 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:41,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1076321560, now seen corresponding path program 1 times [2024-10-13 11:02:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:41,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755025163] [2024-10-13 11:02:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:41,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:41,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755025163] [2024-10-13 11:02:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755025163] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:41,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:41,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 11:02:41,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534262959] [2024-10-13 11:02:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:41,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 11:02:41,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 11:02:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:02:41,833 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:42,021 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2024-10-13 11:02:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 11:02:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 11:02:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:42,022 INFO L225 Difference]: With dead ends: 92 [2024-10-13 11:02:42,022 INFO L226 Difference]: Without dead ends: 92 [2024-10-13 11:02:42,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-13 11:02:42,023 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:42,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 199 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-13 11:02:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2024-10-13 11:02:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 70 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2024-10-13 11:02:42,030 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 16 [2024-10-13 11:02:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:42,030 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2024-10-13 11:02:42,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2024-10-13 11:02:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 11:02:42,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:42,030 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:42,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 11:02:42,031 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:42,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1530248937, now seen corresponding path program 1 times [2024-10-13 11:02:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337876641] [2024-10-13 11:02:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:42,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337876641] [2024-10-13 11:02:42,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337876641] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:42,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:42,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 11:02:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709444582] [2024-10-13 11:02:42,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:42,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 11:02:42,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 11:02:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-13 11:02:42,254 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:42,496 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2024-10-13 11:02:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 11:02:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 11:02:42,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:42,497 INFO L225 Difference]: With dead ends: 99 [2024-10-13 11:02:42,497 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 11:02:42,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-13 11:02:42,498 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:42,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 200 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 11:02:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 11:02:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2024-10-13 11:02:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 57 states have (on average 1.719298245614035) internal successors, (98), 75 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2024-10-13 11:02:42,501 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 19 [2024-10-13 11:02:42,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:42,502 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2024-10-13 11:02:42,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,502 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2024-10-13 11:02:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 11:02:42,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:42,503 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:42,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 11:02:42,503 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:42,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:42,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1530248936, now seen corresponding path program 1 times [2024-10-13 11:02:42,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:42,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672733554] [2024-10-13 11:02:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:42,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672733554] [2024-10-13 11:02:42,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672733554] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:42,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 11:02:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010880971] [2024-10-13 11:02:42,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:42,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:02:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:02:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:42,582 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:42,670 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2024-10-13 11:02:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 11:02:42,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 11:02:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:42,672 INFO L225 Difference]: With dead ends: 75 [2024-10-13 11:02:42,672 INFO L226 Difference]: Without dead ends: 75 [2024-10-13 11:02:42,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:42,672 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:42,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-13 11:02:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-13 11:02:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2024-10-13 11:02:42,679 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 19 [2024-10-13 11:02:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:42,679 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2024-10-13 11:02:42,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,680 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2024-10-13 11:02:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 11:02:42,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:42,680 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:42,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 11:02:42,680 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:42,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1530233044, now seen corresponding path program 1 times [2024-10-13 11:02:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866840024] [2024-10-13 11:02:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:42,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:42,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866840024] [2024-10-13 11:02:42,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866840024] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:42,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:42,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 11:02:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614467449] [2024-10-13 11:02:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:42,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 11:02:42,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 11:02:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:02:42,821 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:42,919 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-10-13 11:02:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 11:02:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 11:02:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:42,920 INFO L225 Difference]: With dead ends: 74 [2024-10-13 11:02:42,920 INFO L226 Difference]: Without dead ends: 74 [2024-10-13 11:02:42,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-13 11:02:42,921 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:42,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 172 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-13 11:02:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-13 11:02:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.603448275862069) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2024-10-13 11:02:42,924 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 19 [2024-10-13 11:02:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:42,924 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2024-10-13 11:02:42,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2024-10-13 11:02:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 11:02:42,925 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:42,925 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:42,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 11:02:42,925 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:42,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash 192584200, now seen corresponding path program 1 times [2024-10-13 11:02:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972128621] [2024-10-13 11:02:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:43,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:43,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972128621] [2024-10-13 11:02:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972128621] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:43,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 11:02:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003794941] [2024-10-13 11:02:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:43,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 11:02:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:43,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 11:02:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:02:43,144 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:43,296 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2024-10-13 11:02:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 11:02:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 11:02:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:43,298 INFO L225 Difference]: With dead ends: 91 [2024-10-13 11:02:43,298 INFO L226 Difference]: Without dead ends: 91 [2024-10-13 11:02:43,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-10-13 11:02:43,299 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:43,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 196 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:43,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-13 11:02:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2024-10-13 11:02:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 76 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2024-10-13 11:02:43,301 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 20 [2024-10-13 11:02:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:43,302 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2024-10-13 11:02:43,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2024-10-13 11:02:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 11:02:43,302 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:43,303 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:43,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 11:02:43,303 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:43,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1690413970, now seen corresponding path program 1 times [2024-10-13 11:02:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:43,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83882636] [2024-10-13 11:02:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83882636] [2024-10-13 11:02:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83882636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8280029] [2024-10-13 11:02:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:43,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:43,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 11:02:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:43,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-13 11:02:43,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:43,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 11:02:44,083 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 45 treesize of output 33 [2024-10-13 11:02:44,086 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 37 treesize of output 25 [2024-10-13 11:02:44,113 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 31 treesize of output 19 [2024-10-13 11:02:44,115 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 25 treesize of output 13 [2024-10-13 11:02:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:44,134 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 11:02:44,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8280029] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:44,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 11:02:44,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2024-10-13 11:02:44,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042162069] [2024-10-13 11:02:44,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:44,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 11:02:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 11:02:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2024-10-13 11:02:44,135 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:44,321 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2024-10-13 11:02:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 11:02:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-13 11:02:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:44,322 INFO L225 Difference]: With dead ends: 77 [2024-10-13 11:02:44,322 INFO L226 Difference]: Without dead ends: 77 [2024-10-13 11:02:44,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-10-13 11:02:44,323 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:44,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 116 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:44,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-13 11:02:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-10-13 11:02:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2024-10-13 11:02:44,325 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 21 [2024-10-13 11:02:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:44,325 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2024-10-13 11:02:44,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2024-10-13 11:02:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 11:02:44,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:44,325 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:44,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:44,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 11:02:44,526 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:44,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1675142998, now seen corresponding path program 1 times [2024-10-13 11:02:44,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:44,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81792207] [2024-10-13 11:02:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:44,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:44,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81792207] [2024-10-13 11:02:44,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81792207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:44,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 11:02:44,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 11:02:44,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773041657] [2024-10-13 11:02:44,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:44,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:02:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:02:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:44,583 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:44,649 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-10-13 11:02:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 11:02:44,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-13 11:02:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:44,650 INFO L225 Difference]: With dead ends: 75 [2024-10-13 11:02:44,650 INFO L226 Difference]: Without dead ends: 75 [2024-10-13 11:02:44,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 11:02:44,651 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:44,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 88 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-13 11:02:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-13 11:02:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-10-13 11:02:44,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 21 [2024-10-13 11:02:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:44,652 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-10-13 11:02:44,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-10-13 11:02:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 11:02:44,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:44,653 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:44,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-13 11:02:44,654 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:44,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 863228791, now seen corresponding path program 1 times [2024-10-13 11:02:44,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:44,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594882100] [2024-10-13 11:02:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:45,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594882100] [2024-10-13 11:02:45,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594882100] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:45,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022285289] [2024-10-13 11:02:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:45,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:45,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:45,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:45,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 11:02:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:45,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-13 11:02:45,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:45,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 11:02:45,635 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 11:02:45,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 11:02:45,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 11:02:45,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-13 11:02:46,089 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 45 treesize of output 29 [2024-10-13 11:02:46,097 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 22 treesize of output 10 [2024-10-13 11:02:46,206 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 11:02:46,207 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-10-13 11:02:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 11:02:46,213 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-10-13 11:02:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:46,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:46,520 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 79 treesize of output 59 [2024-10-13 11:02:46,530 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 62 treesize of output 42 [2024-10-13 11:02:46,646 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 68 treesize of output 66 [2024-10-13 11:02:46,652 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 66 treesize of output 62 [2024-10-13 11:02:46,659 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 82 treesize of output 78 [2024-10-13 11:02:46,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:46,672 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 111 treesize of output 108 [2024-10-13 11:02:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022285289] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:47,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2024-10-13 11:02:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892476666] [2024-10-13 11:02:47,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:47,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 11:02:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 11:02:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 11:02:47,064 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:47,970 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2024-10-13 11:02:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 11:02:47,971 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 11:02:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:47,971 INFO L225 Difference]: With dead ends: 102 [2024-10-13 11:02:47,971 INFO L226 Difference]: Without dead ends: 102 [2024-10-13 11:02:47,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 11:02:47,976 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:47,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 394 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 11:02:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-13 11:02:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2024-10-13 11:02:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.5) internal successors, (102), 81 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2024-10-13 11:02:47,977 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 22 [2024-10-13 11:02:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:47,977 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2024-10-13 11:02:47,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2024-10-13 11:02:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 11:02:47,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:47,978 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:47,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:48,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 11:02:48,179 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:48,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash 863228790, now seen corresponding path program 1 times [2024-10-13 11:02:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:48,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197808451] [2024-10-13 11:02:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:48,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:48,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197808451] [2024-10-13 11:02:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197808451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497261556] [2024-10-13 11:02:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:48,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:48,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 11:02:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:48,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-13 11:02:48,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:48,677 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-13 11:02:48,677 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 [2024-10-13 11:02:48,735 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 19 treesize of output 1 [2024-10-13 11:02:48,870 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 49 treesize of output 33 [2024-10-13 11:02:48,872 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 37 treesize of output 25 [2024-10-13 11:02:48,903 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 31 treesize of output 13 [2024-10-13 11:02:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:48,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:48,983 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 28 treesize of output 20 [2024-10-13 11:02:48,987 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 24 treesize of output 16 [2024-10-13 11:02:49,052 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 11:02:49,052 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 30 treesize of output 1 [2024-10-13 11:02:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497261556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:49,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:49,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2024-10-13 11:02:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016951019] [2024-10-13 11:02:49,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:49,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 11:02:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 11:02:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2024-10-13 11:02:49,054 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:49,789 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2024-10-13 11:02:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 11:02:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 11:02:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:49,790 INFO L225 Difference]: With dead ends: 98 [2024-10-13 11:02:49,790 INFO L226 Difference]: Without dead ends: 98 [2024-10-13 11:02:49,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 11:02:49,791 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:49,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 288 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 11:02:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-13 11:02:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2024-10-13 11:02:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 81 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2024-10-13 11:02:49,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 22 [2024-10-13 11:02:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:49,793 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2024-10-13 11:02:49,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2024-10-13 11:02:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 11:02:49,793 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:49,793 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:49,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 11:02:49,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:49,998 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:49,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 389825483, now seen corresponding path program 1 times [2024-10-13 11:02:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:49,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394733652] [2024-10-13 11:02:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394733652] [2024-10-13 11:02:50,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394733652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:50,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697041798] [2024-10-13 11:02:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:50,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:50,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:50,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 11:02:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:50,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 11:02:50,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:02:50,482 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 [2024-10-13 11:02:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:50,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 11:02:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697041798] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:02:50,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 11:02:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-10-13 11:02:50,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027287670] [2024-10-13 11:02:50,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:02:50,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 11:02:50,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 11:02:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-10-13 11:02:50,485 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:50,602 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-10-13 11:02:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 11:02:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 11:02:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:50,603 INFO L225 Difference]: With dead ends: 81 [2024-10-13 11:02:50,603 INFO L226 Difference]: Without dead ends: 81 [2024-10-13 11:02:50,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-13 11:02:50,604 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:50,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-13 11:02:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-13 11:02:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2024-10-13 11:02:50,606 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 22 [2024-10-13 11:02:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:50,606 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2024-10-13 11:02:50,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2024-10-13 11:02:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 11:02:50,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:50,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:50,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 11:02:50,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:50,808 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:50,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash 634180768, now seen corresponding path program 1 times [2024-10-13 11:02:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148672758] [2024-10-13 11:02:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148672758] [2024-10-13 11:02:50,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148672758] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466766067] [2024-10-13 11:02:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:50,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:50,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:50,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:50,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 11:02:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:51,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 11:02:51,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:51,127 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 [2024-10-13 11:02:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:02:51,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:51,163 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 18 treesize of output 10 [2024-10-13 11:02:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:02:51,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466766067] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:51,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-10-13 11:02:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850041689] [2024-10-13 11:02:51,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:51,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 11:02:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 11:02:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-13 11:02:51,175 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:51,482 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2024-10-13 11:02:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 11:02:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-13 11:02:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:51,483 INFO L225 Difference]: With dead ends: 97 [2024-10-13 11:02:51,483 INFO L226 Difference]: Without dead ends: 97 [2024-10-13 11:02:51,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-10-13 11:02:51,485 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:51,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 137 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 11:02:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-13 11:02:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2024-10-13 11:02:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2024-10-13 11:02:51,488 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 24 [2024-10-13 11:02:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:51,488 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2024-10-13 11:02:51,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2024-10-13 11:02:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 11:02:51,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:51,489 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:51,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 11:02:51,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-13 11:02:51,690 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:51,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:51,690 INFO L85 PathProgramCache]: Analyzing trace with hash 634180769, now seen corresponding path program 1 times [2024-10-13 11:02:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:51,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397041312] [2024-10-13 11:02:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:51,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:02:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397041312] [2024-10-13 11:02:51,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397041312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722024461] [2024-10-13 11:02:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:51,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:51,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:51,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:51,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 11:02:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:52,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 11:02:52,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:52,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722024461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:52,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 3, 3] total 12 [2024-10-13 11:02:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495593292] [2024-10-13 11:02:52,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:52,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 11:02:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 11:02:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-10-13 11:02:52,100 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:52,428 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-10-13 11:02:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 11:02:52,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-13 11:02:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:52,429 INFO L225 Difference]: With dead ends: 95 [2024-10-13 11:02:52,429 INFO L226 Difference]: Without dead ends: 95 [2024-10-13 11:02:52,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-10-13 11:02:52,429 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:52,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 208 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 11:02:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-13 11:02:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2024-10-13 11:02:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 78 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2024-10-13 11:02:52,431 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 24 [2024-10-13 11:02:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:52,432 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2024-10-13 11:02:52,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2024-10-13 11:02:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 11:02:52,432 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:52,432 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:52,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:52,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:52,636 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:52,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1815229399, now seen corresponding path program 2 times [2024-10-13 11:02:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:52,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265022009] [2024-10-13 11:02:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265022009] [2024-10-13 11:02:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265022009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603115129] [2024-10-13 11:02:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 11:02:53,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:53,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:53,427 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) [2024-10-13 11:02:53,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 11:02:53,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 11:02:53,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 11:02:53,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-13 11:02:53,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:53,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 11:02:53,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 11:02:53,727 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 11:02:53,727 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 [2024-10-13 11:02:53,773 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 [2024-10-13 11:02:53,784 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 [2024-10-13 11:02:53,797 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 [2024-10-13 11:02:53,806 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 [2024-10-13 11:02:53,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-10-13 11:02:53,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-10-13 11:02:54,012 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 89 treesize of output 65 [2024-10-13 11:02:54,014 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 69 treesize of output 49 [2024-10-13 11:02:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:54,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:54,287 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 84 treesize of output 64 [2024-10-13 11:02:54,289 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 68 treesize of output 48 [2024-10-13 11:02:54,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,439 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-10-13 11:02:54,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,451 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-10-13 11:02:54,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 76 [2024-10-13 11:02:54,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 66 [2024-10-13 11:02:54,702 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 79 treesize of output 67 [2024-10-13 11:02:54,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,711 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 62 treesize of output 63 [2024-10-13 11:02:54,715 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 78 treesize of output 66 [2024-10-13 11:02:54,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,725 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 61 treesize of output 62 [2024-10-13 11:02:54,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:54,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 78 [2024-10-13 11:02:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603115129] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:54,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:54,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 33 [2024-10-13 11:02:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400233154] [2024-10-13 11:02:54,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:54,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-13 11:02:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-13 11:02:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1027, Unknown=2, NotChecked=0, Total=1122 [2024-10-13 11:02:54,820 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:55,475 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-10-13 11:02:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 11:02:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 11:02:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:55,476 INFO L225 Difference]: With dead ends: 104 [2024-10-13 11:02:55,476 INFO L226 Difference]: Without dead ends: 104 [2024-10-13 11:02:55,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=1562, Unknown=2, NotChecked=0, Total=1722 [2024-10-13 11:02:55,476 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:55,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 442 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 11:02:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-13 11:02:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-10-13 11:02:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 94 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-10-13 11:02:55,478 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 25 [2024-10-13 11:02:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:55,478 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-10-13 11:02:55,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-10-13 11:02:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 11:02:55,479 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:55,479 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:55,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 11:02:55,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-13 11:02:55,686 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:55,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -300497147, now seen corresponding path program 1 times [2024-10-13 11:02:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:55,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757622293] [2024-10-13 11:02:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:55,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:55,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757622293] [2024-10-13 11:02:55,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757622293] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:55,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135698329] [2024-10-13 11:02:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:55,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:55,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 11:02:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:55,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 11:02:55,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:55,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135698329] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:56,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:56,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-13 11:02:56,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067374304] [2024-10-13 11:02:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:56,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 11:02:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 11:02:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-13 11:02:56,057 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:56,106 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2024-10-13 11:02:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 11:02:56,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 11:02:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:56,107 INFO L225 Difference]: With dead ends: 115 [2024-10-13 11:02:56,107 INFO L226 Difference]: Without dead ends: 115 [2024-10-13 11:02:56,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-13 11:02:56,108 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:56,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:02:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-13 11:02:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-10-13 11:02:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.33) internal successors, (133), 110 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2024-10-13 11:02:56,110 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 25 [2024-10-13 11:02:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:56,110 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2024-10-13 11:02:56,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2024-10-13 11:02:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 11:02:56,112 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:56,112 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:56,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 11:02:56,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-13 11:02:56,313 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:56,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -300497147, now seen corresponding path program 1 times [2024-10-13 11:02:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617979356] [2024-10-13 11:02:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617979356] [2024-10-13 11:02:56,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617979356] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:56,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239517178] [2024-10-13 11:02:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:56,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:56,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:56,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:56,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 11:02:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:56,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 11:02:56,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:56,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:56,606 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 11:02:56,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2024-10-13 11:02:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239517178] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:56,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:56,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-10-13 11:02:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304867426] [2024-10-13 11:02:56,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:56,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:02:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:02:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 11:02:56,626 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:56,729 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2024-10-13 11:02:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 11:02:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 11:02:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:56,731 INFO L225 Difference]: With dead ends: 115 [2024-10-13 11:02:56,731 INFO L226 Difference]: Without dead ends: 115 [2024-10-13 11:02:56,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 11:02:56,731 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:56,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:02:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-13 11:02:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-10-13 11:02:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3269230769230769) internal successors, (138), 114 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2024-10-13 11:02:56,736 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 25 [2024-10-13 11:02:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:56,736 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2024-10-13 11:02:56,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2024-10-13 11:02:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 11:02:56,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:56,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:56,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 11:02:56,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-13 11:02:56,938 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:56,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash -437635840, now seen corresponding path program 1 times [2024-10-13 11:02:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197984879] [2024-10-13 11:02:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197984879] [2024-10-13 11:02:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197984879] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726506909] [2024-10-13 11:02:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:57,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:57,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:57,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 11:02:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:57,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-13 11:02:57,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:57,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 11:02:57,650 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 21 treesize of output 13 [2024-10-13 11:02:57,683 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 [2024-10-13 11:02:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:57,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:57,772 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 26 treesize of output 18 [2024-10-13 11:02:57,775 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 22 treesize of output 14 [2024-10-13 11:02:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726506909] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:57,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:57,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-10-13 11:02:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542574429] [2024-10-13 11:02:57,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:57,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 11:02:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 11:02:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-10-13 11:02:57,833 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:58,229 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2024-10-13 11:02:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 11:02:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-13 11:02:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:58,231 INFO L225 Difference]: With dead ends: 119 [2024-10-13 11:02:58,231 INFO L226 Difference]: Without dead ends: 119 [2024-10-13 11:02:58,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 11:02:58,232 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:58,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 269 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 11:02:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-13 11:02:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-10-13 11:02:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 115 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2024-10-13 11:02:58,235 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 26 [2024-10-13 11:02:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:58,236 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2024-10-13 11:02:58,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2024-10-13 11:02:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 11:02:58,236 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:58,236 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:58,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 11:02:58,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-13 11:02:58,437 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:58,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -725476945, now seen corresponding path program 1 times [2024-10-13 11:02:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:58,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827640556] [2024-10-13 11:02:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:58,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:58,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827640556] [2024-10-13 11:02:58,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827640556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:58,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686134047] [2024-10-13 11:02:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:58,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:58,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:58,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:58,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 11:02:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:58,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-13 11:02:58,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:58,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 11:02:58,958 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 20 treesize of output 12 [2024-10-13 11:02:58,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:02:58,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 11:02:59,024 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 16 treesize of output 8 [2024-10-13 11:02:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:59,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:02:59,063 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 8 treesize of output 4 [2024-10-13 11:02:59,081 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 21 treesize of output 13 [2024-10-13 11:02:59,085 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 13 treesize of output 11 [2024-10-13 11:02:59,086 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 20 treesize of output 18 [2024-10-13 11:02:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:02:59,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686134047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:02:59,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:02:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-10-13 11:02:59,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716374740] [2024-10-13 11:02:59,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:02:59,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 11:02:59,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:02:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 11:02:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-10-13 11:02:59,103 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:02:59,337 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2024-10-13 11:02:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 11:02:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-13 11:02:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:02:59,338 INFO L225 Difference]: With dead ends: 113 [2024-10-13 11:02:59,338 INFO L226 Difference]: Without dead ends: 111 [2024-10-13 11:02:59,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2024-10-13 11:02:59,338 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 11:02:59,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 337 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 11:02:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-13 11:02:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-10-13 11:02:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 98 states have (on average 1.3265306122448979) internal successors, (130), 108 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-10-13 11:02:59,341 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 26 [2024-10-13 11:02:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:02:59,341 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-10-13 11:02:59,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:02:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-10-13 11:02:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 11:02:59,341 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:02:59,341 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:02:59,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 11:02:59,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:59,546 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:02:59,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:02:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash -872035061, now seen corresponding path program 1 times [2024-10-13 11:02:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:02:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234455085] [2024-10-13 11:02:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:02:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 11:02:59,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:02:59,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234455085] [2024-10-13 11:02:59,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234455085] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:02:59,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075505820] [2024-10-13 11:02:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:02:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:02:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:02:59,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:02:59,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 11:02:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:02:59,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 11:02:59,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:02:59,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 11:02:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:02:59,818 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 [2024-10-13 11:02:59,883 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 11:02:59,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 11:03:00,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 11:03:00,025 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 [2024-10-13 11:03:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:03:00,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:03:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:03:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075505820] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:03:00,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:03:00,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2024-10-13 11:03:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22747678] [2024-10-13 11:03:00,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:03:00,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 11:03:00,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:03:00,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 11:03:00,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-10-13 11:03:00,159 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:03:00,243 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-10-13 11:03:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 11:03:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-13 11:03:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:03:00,244 INFO L225 Difference]: With dead ends: 107 [2024-10-13 11:03:00,244 INFO L226 Difference]: Without dead ends: 107 [2024-10-13 11:03:00,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-10-13 11:03:00,244 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:03:00,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 71 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 11:03:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-13 11:03:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2024-10-13 11:03:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.297872340425532) internal successors, (122), 102 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2024-10-13 11:03:00,246 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 30 [2024-10-13 11:03:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:03:00,246 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2024-10-13 11:03:00,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2024-10-13 11:03:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 11:03:00,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:03:00,246 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:03:00,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 11:03:00,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 11:03:00,451 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:03:00,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:03:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1243479874, now seen corresponding path program 3 times [2024-10-13 11:03:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:03:00,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773039458] [2024-10-13 11:03:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:00,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:03:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:03:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:03:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773039458] [2024-10-13 11:03:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773039458] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:03:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930795758] [2024-10-13 11:03:00,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 11:03:00,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:00,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:03:00,509 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:03:00,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 11:03:00,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 11:03:00,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 11:03:00,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 11:03:00,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:03:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 11:03:00,791 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 11:03:00,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930795758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:03:00,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 11:03:00,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-10-13 11:03:00,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851221307] [2024-10-13 11:03:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:03:00,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 11:03:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:03:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 11:03:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 11:03:00,793 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:03:00,817 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-10-13 11:03:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 11:03:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-13 11:03:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:03:00,818 INFO L225 Difference]: With dead ends: 81 [2024-10-13 11:03:00,818 INFO L226 Difference]: Without dead ends: 81 [2024-10-13 11:03:00,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 11:03:00,819 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:03:00,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:03:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-13 11:03:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-13 11:03:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2024-10-13 11:03:00,820 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 30 [2024-10-13 11:03:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:03:00,820 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2024-10-13 11:03:00,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2024-10-13 11:03:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 11:03:00,820 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:03:00,820 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:03:00,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 11:03:01,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-13 11:03:01,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:03:01,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:03:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1263283095, now seen corresponding path program 1 times [2024-10-13 11:03:01,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:03:01,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022709758] [2024-10-13 11:03:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:01,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:03:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:03:01,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:03:01,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022709758] [2024-10-13 11:03:01,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022709758] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:03:01,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734276811] [2024-10-13 11:03:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:01,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:03:01,572 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:03:01,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 11:03:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:01,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-13 11:03:01,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:03:01,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 11:03:02,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:03:02,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2024-10-13 11:03:02,199 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 18 treesize of output 13 [2024-10-13 11:03:02,268 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 [2024-10-13 11:03:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:03:02,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:03:02,421 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 40 treesize of output 28 [2024-10-13 11:03:02,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-10-13 11:03:02,473 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 13 treesize of output 11 [2024-10-13 11:03:02,474 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 20 treesize of output 18 [2024-10-13 11:03:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:03:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734276811] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:03:02,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:03:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 37 [2024-10-13 11:03:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702439053] [2024-10-13 11:03:02,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:03:02,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 11:03:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:03:02,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 11:03:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 11:03:02,618 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:03:03,412 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2024-10-13 11:03:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 11:03:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-13 11:03:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:03:03,416 INFO L225 Difference]: With dead ends: 113 [2024-10-13 11:03:03,417 INFO L226 Difference]: Without dead ends: 113 [2024-10-13 11:03:03,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=417, Invalid=3243, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 11:03:03,418 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 11:03:03,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 243 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 11:03:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-13 11:03:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 96. [2024-10-13 11:03:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 95 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2024-10-13 11:03:03,425 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 31 [2024-10-13 11:03:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:03:03,425 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2024-10-13 11:03:03,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2024-10-13 11:03:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 11:03:03,426 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:03:03,426 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:03:03,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-13 11:03:03,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:03,627 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:03:03,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:03:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -967812231, now seen corresponding path program 1 times [2024-10-13 11:03:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:03:03,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199803332] [2024-10-13 11:03:03,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:03:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 11:03:04,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:03:04,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199803332] [2024-10-13 11:03:04,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199803332] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:03:04,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936643713] [2024-10-13 11:03:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:04,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:04,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:03:04,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:03:04,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 11:03:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:04,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-13 11:03:04,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:03:04,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 11:03:04,342 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-10-13 11:03:04,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2024-10-13 11:03:04,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 11:03:04,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 11:03:04,636 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2024-10-13 11:03:04,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2024-10-13 11:03:04,654 INFO L349 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2024-10-13 11:03:04,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 38 [2024-10-13 11:03:05,151 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 53 treesize of output 33 [2024-10-13 11:03:05,261 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-13 11:03:05,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-10-13 11:03:05,274 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-13 11:03:05,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2024-10-13 11:03:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 11:03:05,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 11:03:51,735 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 187 treesize of output 155 [2024-10-13 11:03:51,740 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 159 treesize of output 127 [2024-10-13 11:03:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 11:03:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936643713] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 11:03:52,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 11:03:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 14] total 41 [2024-10-13 11:03:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647191164] [2024-10-13 11:03:52,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 11:03:52,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 11:03:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:03:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 11:03:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1493, Unknown=1, NotChecked=0, Total=1640 [2024-10-13 11:03:52,580 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:03:55,287 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2024-10-13 11:03:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-13 11:03:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-13 11:03:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:03:55,288 INFO L225 Difference]: With dead ends: 100 [2024-10-13 11:03:55,288 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 11:03:55,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=506, Invalid=4323, Unknown=1, NotChecked=0, Total=4830 [2024-10-13 11:03:55,289 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 197 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-13 11:03:55,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 448 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-13 11:03:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 11:03:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2024-10-13 11:03:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 82 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2024-10-13 11:03:55,296 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 37 [2024-10-13 11:03:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:03:55,296 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2024-10-13 11:03:55,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6341463414634148) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2024-10-13 11:03:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-13 11:03:55,299 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:03:55,299 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:03:55,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-13 11:03:55,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:55,501 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:03:55,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:03:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 372691121, now seen corresponding path program 1 times [2024-10-13 11:03:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:03:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902522348] [2024-10-13 11:03:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:03:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 11:03:55,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:03:55,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902522348] [2024-10-13 11:03:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902522348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:03:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852431037] [2024-10-13 11:03:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:55,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:03:55,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:03:55,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 11:03:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:55,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 11:03:55,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:03:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 11:03:55,895 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 11:03:55,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852431037] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 11:03:55,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 11:03:55,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-13 11:03:55,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449540308] [2024-10-13 11:03:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 11:03:55,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 11:03:55,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 11:03:55,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 11:03:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:03:55,896 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 11:03:55,928 INFO L93 Difference]: Finished difference Result 46 states and 45 transitions. [2024-10-13 11:03:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 11:03:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-13 11:03:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 11:03:55,928 INFO L225 Difference]: With dead ends: 46 [2024-10-13 11:03:55,929 INFO L226 Difference]: Without dead ends: 46 [2024-10-13 11:03:55,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-13 11:03:55,929 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 11:03:55,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 11:03:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-13 11:03:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-13 11:03:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 45 transitions. [2024-10-13 11:03:55,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 45 transitions. Word has length 41 [2024-10-13 11:03:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 11:03:55,931 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 45 transitions. [2024-10-13 11:03:55,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 11:03:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 45 transitions. [2024-10-13 11:03:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 11:03:55,932 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 11:03:55,932 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 11:03:55,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-13 11:03:56,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:56,136 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-13 11:03:56,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 11:03:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1331474993, now seen corresponding path program 1 times [2024-10-13 11:03:56,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 11:03:56,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433198548] [2024-10-13 11:03:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:56,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 11:03:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 11:03:57,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 11:03:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433198548] [2024-10-13 11:03:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433198548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 11:03:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489637704] [2024-10-13 11:03:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 11:03:57,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 11:03:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 11:03:57,684 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 11:03:57,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 11:03:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 11:03:57,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-13 11:03:57,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 11:03:58,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 11:03:58,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 11:03:58,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 11:03:58,945 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 17 treesize of output 21 [2024-10-13 11:03:59,894 INFO L349 Elim1Store]: treesize reduction 106, result has 49.0 percent of original size [2024-10-13 11:03:59,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 195