./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 19:02:21,555 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 19:02:21,612 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 19:02:21,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 19:02:21,618 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 19:02:21,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 19:02:21,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 19:02:21,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 19:02:21,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 19:02:21,644 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 19:02:21,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 19:02:21,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 19:02:21,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 19:02:21,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 19:02:21,647 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 19:02:21,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 19:02:21,647 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 19:02:21,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 19:02:21,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 19:02:21,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 19:02:21,648 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 19:02:21,651 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 19:02:21,651 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 19:02:21,652 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 19:02:21,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 19:02:21,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 19:02:21,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 19:02:21,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 19:02:21,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:02:21,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 19:02:21,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 19:02:21,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2024-11-22 19:02:21,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 19:02:21,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 19:02:21,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 19:02:21,872 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 19:02:21,872 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 19:02:21,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-22 19:02:23,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 19:02:23,257 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 19:02:23,257 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2024-11-22 19:02:23,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c3756be/55dfc0e51e7d415dadd5b6eadb133313/FLAG9202785ae [2024-11-22 19:02:23,620 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c3756be/55dfc0e51e7d415dadd5b6eadb133313 [2024-11-22 19:02:23,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 19:02:23,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 19:02:23,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 19:02:23,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 19:02:23,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 19:02:23,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:02:23" (1/1) ... [2024-11-22 19:02:23,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44973f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:23, skipping insertion in model container [2024-11-22 19:02:23,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:02:23" (1/1) ... [2024-11-22 19:02:23,662 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 19:02:23,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:02:23,925 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 19:02:23,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:02:24,015 INFO L204 MainTranslator]: Completed translation [2024-11-22 19:02:24,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24 WrapperNode [2024-11-22 19:02:24,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 19:02:24,017 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 19:02:24,017 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 19:02:24,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 19:02:24,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,053 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 142 [2024-11-22 19:02:24,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 19:02:24,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 19:02:24,055 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 19:02:24,055 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 19:02:24,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,065 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,081 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 12, 6]. 60 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]. [2024-11-22 19:02:24,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,089 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 19:02:24,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 19:02:24,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 19:02:24,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 19:02:24,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (1/1) ... [2024-11-22 19:02:24,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:02:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:24,132 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) [2024-11-22 19:02:24,137 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 [2024-11-22 19:02:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 19:02:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 19:02:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 19:02:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-22 19:02:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 19:02:24,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 19:02:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 19:02:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 19:02:24,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 19:02:24,300 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 19:02:24,302 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 19:02:24,550 INFO L? ?]: Removed 108 outVars from TransFormulas that were not future-live. [2024-11-22 19:02:24,550 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 19:02:24,560 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 19:02:24,561 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 19:02:24,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:02:24 BoogieIcfgContainer [2024-11-22 19:02:24,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 19:02:24,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 19:02:24,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 19:02:24,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 19:02:24,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:02:23" (1/3) ... [2024-11-22 19:02:24,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67db32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:02:24, skipping insertion in model container [2024-11-22 19:02:24,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:24" (2/3) ... [2024-11-22 19:02:24,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c67db32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:02:24, skipping insertion in model container [2024-11-22 19:02:24,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:02:24" (3/3) ... [2024-11-22 19:02:24,569 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2024-11-22 19:02:24,582 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 19:02:24,582 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2024-11-22 19:02:24,614 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 19:02:24,619 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;@33e7341d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 19:02:24,619 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-22 19:02:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-22 19:02:24,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:24,627 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:24,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:24,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1814797497, now seen corresponding path program 1 times [2024-11-22 19:02:24,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:24,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819824314] [2024-11-22 19:02:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:24,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:24,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819824314] [2024-11-22 19:02:24,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819824314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:24,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:02:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330777748] [2024-11-22 19:02:24,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:24,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:24,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:24,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:24,892 INFO L87 Difference]: Start difference. First operand has 100 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,005 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2024-11-22 19:02:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-22 19:02:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,012 INFO L225 Difference]: With dead ends: 97 [2024-11-22 19:02:25,012 INFO L226 Difference]: Without dead ends: 94 [2024-11-22 19:02:25,014 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 [2024-11-22 19:02:25,016 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-22 19:02:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-22 19:02:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 90 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2024-11-22 19:02:25,045 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 7 [2024-11-22 19:02:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,045 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2024-11-22 19:02:25,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2024-11-22 19:02:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-22 19:02:25,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,046 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:25,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 19:02:25,047 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:25,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1814797498, now seen corresponding path program 1 times [2024-11-22 19:02:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006504801] [2024-11-22 19:02:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:25,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006504801] [2024-11-22 19:02:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006504801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:25,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:02:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395321537] [2024-11-22 19:02:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:25,172 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,231 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2024-11-22 19:02:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-22 19:02:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,233 INFO L225 Difference]: With dead ends: 92 [2024-11-22 19:02:25,233 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 19:02:25,234 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 [2024-11-22 19:02:25,235 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 19:02:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-22 19:02:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 88 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2024-11-22 19:02:25,247 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 7 [2024-11-22 19:02:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,247 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2024-11-22 19:02:25,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2024-11-22 19:02:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 19:02:25,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:25,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 19:02:25,249 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:25,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -491071040, now seen corresponding path program 1 times [2024-11-22 19:02:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218908921] [2024-11-22 19:02:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:25,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218908921] [2024-11-22 19:02:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218908921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:25,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:25,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:02:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021309744] [2024-11-22 19:02:25,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:02:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:02:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:25,353 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,488 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-22 19:02:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:02:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-22 19:02:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,490 INFO L225 Difference]: With dead ends: 91 [2024-11-22 19:02:25,490 INFO L226 Difference]: Without dead ends: 91 [2024-11-22 19:02:25,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:25,491 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 304 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-22 19:02:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-22 19:02:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 87 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-22 19:02:25,498 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 13 [2024-11-22 19:02:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,499 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-22 19:02:25,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-22 19:02:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 19:02:25,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,500 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:25,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 19:02:25,500 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:25,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash -491071039, now seen corresponding path program 1 times [2024-11-22 19:02:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712414595] [2024-11-22 19:02:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:25,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712414595] [2024-11-22 19:02:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712414595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:25,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:25,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:02:25,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715249044] [2024-11-22 19:02:25,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:02:25,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:02:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:25,641 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,775 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2024-11-22 19:02:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:02:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-22 19:02:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,777 INFO L225 Difference]: With dead ends: 90 [2024-11-22 19:02:25,777 INFO L226 Difference]: Without dead ends: 90 [2024-11-22 19:02:25,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:25,779 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 1 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 320 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-22 19:02:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-22 19:02:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 86 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2024-11-22 19:02:25,789 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 13 [2024-11-22 19:02:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,789 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2024-11-22 19:02:25,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2024-11-22 19:02:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-22 19:02:25,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:25,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 19:02:25,791 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:25,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1053273408, now seen corresponding path program 1 times [2024-11-22 19:02:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732290871] [2024-11-22 19:02:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732290871] [2024-11-22 19:02:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732290871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:25,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 19:02:25,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057116188] [2024-11-22 19:02:25,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:25,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:25,849 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,860 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2024-11-22 19:02:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-22 19:02:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,861 INFO L225 Difference]: With dead ends: 96 [2024-11-22 19:02:25,863 INFO L226 Difference]: Without dead ends: 96 [2024-11-22 19:02:25,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:25,864 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 189 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-22 19:02:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2024-11-22 19:02:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 87 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-22 19:02:25,869 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 15 [2024-11-22 19:02:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,870 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-22 19:02:25,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:25,870 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-22 19:02:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-22 19:02:25,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,871 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, 1, 1] [2024-11-22 19:02:25,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 19:02:25,871 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:25,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1641659582, now seen corresponding path program 1 times [2024-11-22 19:02:25,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156403607] [2024-11-22 19:02:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:02:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156403607] [2024-11-22 19:02:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156403607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113112404] [2024-11-22 19:02:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:25,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:25,957 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) [2024-11-22 19:02:25,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 19:02:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:26,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 19:02:26,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:26,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:02:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113112404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 19:02:26,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 19:02:26,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-22 19:02:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953190964] [2024-11-22 19:02:26,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:26,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 19:02:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 19:02:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:02:26,149 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:02:26,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:26,163 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2024-11-22 19:02:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 19:02:26,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-22 19:02:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:26,165 INFO L225 Difference]: With dead ends: 97 [2024-11-22 19:02:26,165 INFO L226 Difference]: Without dead ends: 97 [2024-11-22 19:02:26,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:02:26,166 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:26,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 188 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-22 19:02:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-22 19:02:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 92 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2024-11-22 19:02:26,173 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 28 [2024-11-22 19:02:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:26,173 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2024-11-22 19:02:26,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:02:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2024-11-22 19:02:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:02:26,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:26,174 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:26,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 19:02:26,374 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 [2024-11-22 19:02:26,375 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:26,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1979795968, now seen corresponding path program 2 times [2024-11-22 19:02:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:26,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124093987] [2024-11-22 19:02:26,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:26,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:26,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 19:02:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124093987] [2024-11-22 19:02:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124093987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714419158] [2024-11-22 19:02:26,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:26,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:26,863 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) [2024-11-22 19:02:26,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 19:02:26,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:26,969 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:26,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 19:02:26,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:26,998 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 [2024-11-22 19:02:27,022 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:02:27,081 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 19:02:27,081 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 [2024-11-22 19:02:27,141 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:27,141 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 [2024-11-22 19:02:27,200 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-22 19:02:27,217 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 19:02:27,218 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 [2024-11-22 19:02:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 18 not checked. [2024-11-22 19:02:27,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:27,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714419158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:27,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:27,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2024-11-22 19:02:27,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386187411] [2024-11-22 19:02:27,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:27,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 19:02:27,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 19:02:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=379, Unknown=2, NotChecked=82, Total=552 [2024-11-22 19:02:27,567 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:02:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:27,844 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-22 19:02:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:02:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2024-11-22 19:02:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:27,845 INFO L225 Difference]: With dead ends: 104 [2024-11-22 19:02:27,846 INFO L226 Difference]: Without dead ends: 104 [2024-11-22 19:02:27,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=486, Unknown=2, NotChecked=94, Total=702 [2024-11-22 19:02:27,847 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 76 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:27,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 344 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 352 Invalid, 0 Unknown, 200 Unchecked, 0.2s Time] [2024-11-22 19:02:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-22 19:02:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2024-11-22 19:02:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 87 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2024-11-22 19:02:27,854 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 41 [2024-11-22 19:02:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:27,855 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2024-11-22 19:02:27,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:02:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2024-11-22 19:02:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:02:27,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:27,856 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:27,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 19:02:28,057 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,SelfDestructingSolverStorable6 [2024-11-22 19:02:28,058 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:28,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1979795967, now seen corresponding path program 1 times [2024-11-22 19:02:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707441641] [2024-11-22 19:02:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 19:02:28,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:28,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707441641] [2024-11-22 19:02:28,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707441641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:28,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375623856] [2024-11-22 19:02:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:28,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:28,486 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) [2024-11-22 19:02:28,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 19:02:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:28,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 19:02:28,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:28,605 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 [2024-11-22 19:02:28,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:28,639 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-22 19:02:28,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:28,674 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 [2024-11-22 19:02:28,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:28,756 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 [2024-11-22 19:02:28,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:28,852 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 [2024-11-22 19:02:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 19:02:28,871 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:02:28,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375623856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:28,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:02:28,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2024-11-22 19:02:28,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383549466] [2024-11-22 19:02:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:28,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 19:02:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 19:02:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2024-11-22 19:02:28,872 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:28,969 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2024-11-22 19:02:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:02:28,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-22 19:02:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:28,970 INFO L225 Difference]: With dead ends: 89 [2024-11-22 19:02:28,970 INFO L226 Difference]: Without dead ends: 89 [2024-11-22 19:02:28,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-22 19:02:28,971 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:28,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 268 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2024-11-22 19:02:28,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-22 19:02:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-22 19:02:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2024-11-22 19:02:28,975 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 41 [2024-11-22 19:02:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:28,975 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2024-11-22 19:02:28,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:28,976 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2024-11-22 19:02:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:28,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:28,977 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:28,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 19:02:29,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:29,180 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:29,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1605676675, now seen corresponding path program 1 times [2024-11-22 19:02:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:29,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874311771] [2024-11-22 19:02:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:29,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:29,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874311771] [2024-11-22 19:02:29,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874311771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:29,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739239209] [2024-11-22 19:02:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:29,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:29,346 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) [2024-11-22 19:02:29,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 19:02:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:29,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 19:02:29,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:29,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:02:29,462 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 [2024-11-22 19:02:29,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:29,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:29,512 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:02:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:29,552 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 [2024-11-22 19:02:29,557 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:02:29,558 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 [2024-11-22 19:02:29,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:29,620 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-22 19:02:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:29,648 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 [2024-11-22 19:02:29,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:29,708 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 [2024-11-22 19:02:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2024-11-22 19:02:29,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:29,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739239209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:29,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2024-11-22 19:02:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621962188] [2024-11-22 19:02:29,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:29,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 19:02:29,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 19:02:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=233, Unknown=2, NotChecked=62, Total=342 [2024-11-22 19:02:29,828 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:29,842 WARN L873 $PredicateComparison]: unable to prove that (and (not (= |c_node_create_~temp~0#1.base| 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|)))) is different from true [2024-11-22 19:02:29,844 WARN L873 $PredicateComparison]: unable to prove that (and (not (= |c_node_create_#res#1.base| 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|)))) is different from true [2024-11-22 19:02:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:30,103 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2024-11-22 19:02:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 19:02:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-22 19:02:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:30,104 INFO L225 Difference]: With dead ends: 86 [2024-11-22 19:02:30,104 INFO L226 Difference]: Without dead ends: 86 [2024-11-22 19:02:30,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=467, Unknown=4, NotChecked=188, Total=756 [2024-11-22 19:02:30,105 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:30,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 620 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2024-11-22 19:02:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-22 19:02:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-22 19:02:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2024-11-22 19:02:30,116 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 45 [2024-11-22 19:02:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:30,116 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2024-11-22 19:02:30,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2024-11-22 19:02:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:30,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:30,117 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:30,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:30,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:30,318 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:30,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:30,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1605829639, now seen corresponding path program 1 times [2024-11-22 19:02:30,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:30,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832460159] [2024-11-22 19:02:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:30,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832460159] [2024-11-22 19:02:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832460159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917873675] [2024-11-22 19:02:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:30,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:30,739 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) [2024-11-22 19:02:30,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 19:02:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:30,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-22 19:02:30,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:30,892 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 [2024-11-22 19:02:31,106 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 9 treesize of output 3 [2024-11-22 19:02:31,109 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 9 treesize of output 3 [2024-11-22 19:02:31,141 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:02:31,177 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:31,177 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 15 treesize of output 15 [2024-11-22 19:02:31,181 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 [2024-11-22 19:02:31,242 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 [2024-11-22 19:02:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-11-22 19:02:31,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:31,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917873675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:31,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2024-11-22 19:02:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314240715] [2024-11-22 19:02:31,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:31,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 19:02:31,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 19:02:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=966, Unknown=1, NotChecked=62, Total=1122 [2024-11-22 19:02:31,450 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:32,202 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2024-11-22 19:02:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 19:02:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-22 19:02:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:32,203 INFO L225 Difference]: With dead ends: 97 [2024-11-22 19:02:32,204 INFO L226 Difference]: Without dead ends: 97 [2024-11-22 19:02:32,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1815, Unknown=1, NotChecked=86, Total=2070 [2024-11-22 19:02:32,204 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 65 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:32,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 889 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1037 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2024-11-22 19:02:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-22 19:02:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-22 19:02:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 91 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2024-11-22 19:02:32,215 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 45 [2024-11-22 19:02:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:32,215 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2024-11-22 19:02:32,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2024-11-22 19:02:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:32,216 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:32,216 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:32,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 19:02:32,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 19:02:32,417 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:32,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1605829638, now seen corresponding path program 1 times [2024-11-22 19:02:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:32,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901228439] [2024-11-22 19:02:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:32,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:32,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:32,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901228439] [2024-11-22 19:02:32,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901228439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:32,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385976918] [2024-11-22 19:02:32,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:32,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:32,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:32,666 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) [2024-11-22 19:02:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 19:02:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:32,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 19:02:32,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:32,934 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 9 treesize of output 3 [2024-11-22 19:02:32,937 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-22 19:02:32,956 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-22 19:02:32,956 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 16 treesize of output 18 [2024-11-22 19:02:32,982 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 [2024-11-22 19:02:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:32,985 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:02:32,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385976918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:32,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:02:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2024-11-22 19:02:32,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974128074] [2024-11-22 19:02:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:32,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 19:02:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 19:02:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2024-11-22 19:02:32,988 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:33,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:33,108 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2024-11-22 19:02:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 19:02:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2024-11-22 19:02:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:33,109 INFO L225 Difference]: With dead ends: 95 [2024-11-22 19:02:33,109 INFO L226 Difference]: Without dead ends: 95 [2024-11-22 19:02:33,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=367, Unknown=1, NotChecked=38, Total=462 [2024-11-22 19:02:33,110 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 5 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:33,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 376 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2024-11-22 19:02:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-22 19:02:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-22 19:02:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 89 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2024-11-22 19:02:33,112 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 45 [2024-11-22 19:02:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:33,114 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2024-11-22 19:02:33,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2024-11-22 19:02:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 19:02:33,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:33,117 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:33,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:33,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:33,318 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:33,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash -453745923, now seen corresponding path program 1 times [2024-11-22 19:02:33,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201254216] [2024-11-22 19:02:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:34,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201254216] [2024-11-22 19:02:34,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201254216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:34,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27071078] [2024-11-22 19:02:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:34,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:34,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:34,929 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) [2024-11-22 19:02:34,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 19:02:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:35,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-22 19:02:35,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:35,370 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 19:02:35,371 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 [2024-11-22 19:02:35,375 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 16 treesize of output 11 [2024-11-22 19:02:35,470 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 [2024-11-22 19:02:35,474 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 [2024-11-22 19:02:35,733 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 77 treesize of output 35 [2024-11-22 19:02:35,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 11 [2024-11-22 19:02:35,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:02:35,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:35,847 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:02:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:35,871 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 85 treesize of output 68 [2024-11-22 19:02:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:35,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2024-11-22 19:02:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:35,883 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 61 treesize of output 50 [2024-11-22 19:02:35,899 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-22 19:02:35,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-22 19:02:35,964 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 82 treesize of output 58 [2024-11-22 19:02:35,966 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 [2024-11-22 19:02:36,079 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 39 treesize of output 21 [2024-11-22 19:02:36,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2024-11-22 19:02:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:02:36,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:36,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27071078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:36,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2024-11-22 19:02:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357509193] [2024-11-22 19:02:36,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:36,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-22 19:02:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-22 19:02:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3036, Unknown=1, NotChecked=110, Total=3306 [2024-11-22 19:02:36,599 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 46 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:38,638 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-11-22 19:02:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 19:02:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 46 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2024-11-22 19:02:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:38,639 INFO L225 Difference]: With dead ends: 103 [2024-11-22 19:02:38,639 INFO L226 Difference]: Without dead ends: 103 [2024-11-22 19:02:38,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=354, Invalid=5655, Unknown=1, NotChecked=152, Total=6162 [2024-11-22 19:02:38,641 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 83 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:38,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1810 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2217 Invalid, 0 Unknown, 105 Unchecked, 1.1s Time] [2024-11-22 19:02:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-22 19:02:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-11-22 19:02:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 93 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-11-22 19:02:38,644 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 49 [2024-11-22 19:02:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:38,645 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-11-22 19:02:38,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 46 states have internal predecessors, (85), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-11-22 19:02:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 19:02:38,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:38,647 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:38,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 19:02:38,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:38,848 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:38,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash -453745924, now seen corresponding path program 1 times [2024-11-22 19:02:38,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:38,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972177944] [2024-11-22 19:02:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:38,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:39,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972177944] [2024-11-22 19:02:39,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972177944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318228410] [2024-11-22 19:02:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:39,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:39,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:39,708 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) [2024-11-22 19:02:39,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 19:02:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:39,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-22 19:02:39,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:39,994 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:39,995 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 [2024-11-22 19:02:40,059 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 [2024-11-22 19:02:40,213 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 5 [2024-11-22 19:02:40,217 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 19:02:40,217 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 15 treesize of output 7 [2024-11-22 19:02:40,354 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))))) is different from true [2024-11-22 19:02:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:40,371 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 22 treesize of output 17 [2024-11-22 19:02:40,389 INFO L349 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2024-11-22 19:02:40,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 34 treesize of output 57 [2024-11-22 19:02:40,492 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 50 treesize of output 30 [2024-11-22 19:02:40,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 19:02:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-22 19:02:40,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318228410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:40,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:40,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2024-11-22 19:02:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312934038] [2024-11-22 19:02:40,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:40,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-22 19:02:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-22 19:02:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2193, Unknown=1, NotChecked=94, Total=2450 [2024-11-22 19:02:40,885 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:41,866 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-11-22 19:02:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 19:02:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2024-11-22 19:02:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:41,867 INFO L225 Difference]: With dead ends: 103 [2024-11-22 19:02:41,867 INFO L226 Difference]: Without dead ends: 103 [2024-11-22 19:02:41,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=4113, Unknown=1, NotChecked=130, Total=4556 [2024-11-22 19:02:41,868 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 76 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:41,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1239 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1481 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2024-11-22 19:02:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-22 19:02:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-11-22 19:02:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 93 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-11-22 19:02:41,870 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 49 [2024-11-22 19:02:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:41,871 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-11-22 19:02:41,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-11-22 19:02:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-22 19:02:41,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:41,873 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-22 19:02:41,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:42,073 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,SelfDestructingSolverStorable12 [2024-11-22 19:02:42,074 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:42,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:42,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1444719924, now seen corresponding path program 1 times [2024-11-22 19:02:42,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:42,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134600432] [2024-11-22 19:02:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:42,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 19:02:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134600432] [2024-11-22 19:02:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134600432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:42,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 19:02:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433625700] [2024-11-22 19:02:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:42,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 19:02:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 19:02:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-22 19:02:42,218 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:42,337 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2024-11-22 19:02:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 19:02:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2024-11-22 19:02:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:42,338 INFO L225 Difference]: With dead ends: 116 [2024-11-22 19:02:42,338 INFO L226 Difference]: Without dead ends: 116 [2024-11-22 19:02:42,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-22 19:02:42,338 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:42,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 347 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-22 19:02:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2024-11-22 19:02:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 90 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-11-22 19:02:42,341 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 52 [2024-11-22 19:02:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:42,341 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-11-22 19:02:42,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-11-22 19:02:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-22 19:02:42,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:42,343 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-22 19:02:42,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 19:02:42,343 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:42,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1444719925, now seen corresponding path program 1 times [2024-11-22 19:02:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097179067] [2024-11-22 19:02:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097179067] [2024-11-22 19:02:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097179067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335691843] [2024-11-22 19:02:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:42,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:42,665 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) [2024-11-22 19:02:42,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 19:02:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:42,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-22 19:02:42,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:42,808 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 [2024-11-22 19:02:42,953 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 9 treesize of output 3 [2024-11-22 19:02:42,959 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 9 treesize of output 3 [2024-11-22 19:02:42,988 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14|) 0))) is different from true [2024-11-22 19:02:43,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:43,013 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 [2024-11-22 19:02:43,020 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:43,021 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 15 treesize of output 15 [2024-11-22 19:02:43,062 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 [2024-11-22 19:02:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-11-22 19:02:43,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:43,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335691843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:43,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:43,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-22 19:02:43,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009099905] [2024-11-22 19:02:43,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:43,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 19:02:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 19:02:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=687, Unknown=1, NotChecked=52, Total=812 [2024-11-22 19:02:43,218 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:02:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:43,625 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2024-11-22 19:02:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 19:02:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2024-11-22 19:02:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:43,625 INFO L225 Difference]: With dead ends: 122 [2024-11-22 19:02:43,626 INFO L226 Difference]: Without dead ends: 122 [2024-11-22 19:02:43,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1277, Unknown=1, NotChecked=72, Total=1482 [2024-11-22 19:02:43,626 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 88 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:43,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 707 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 761 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2024-11-22 19:02:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-22 19:02:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2024-11-22 19:02:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 94 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-11-22 19:02:43,629 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 52 [2024-11-22 19:02:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:43,629 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-11-22 19:02:43,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:02:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-11-22 19:02:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:02:43,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:43,630 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:43,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 19:02:43,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 19:02:43,831 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:43,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1109567757, now seen corresponding path program 2 times [2024-11-22 19:02:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:43,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085511329] [2024-11-22 19:02:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:43,864 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:43,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:02:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085511329] [2024-11-22 19:02:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085511329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263416284] [2024-11-22 19:02:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:45,355 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) [2024-11-22 19:02:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 19:02:45,471 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:45,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:45,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-22 19:02:45,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:45,604 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 [2024-11-22 19:02:45,610 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 [2024-11-22 19:02:45,816 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:45,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 19:02:45,829 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:45,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-22 19:02:45,845 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 19:02:45,845 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 [2024-11-22 19:02:45,964 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 15 [2024-11-22 19:02:45,972 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 23 treesize of output 22 [2024-11-22 19:02:46,218 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 19:02:46,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2024-11-22 19:02:46,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-22 19:02:46,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:02:46,367 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|)))))) is different from true [2024-11-22 19:02:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:46,404 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-22 19:02:46,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 51 [2024-11-22 19:02:46,419 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-22 19:02:46,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-22 19:02:46,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-22 19:02:46,510 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 65 treesize of output 41 [2024-11-22 19:02:46,742 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2024-11-22 19:02:46,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 27 [2024-11-22 19:02:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:02:46,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:47,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263416284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:47,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:47,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2024-11-22 19:02:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454836899] [2024-11-22 19:02:47,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:47,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-22 19:02:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:47,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-22 19:02:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3348, Unknown=1, NotChecked=116, Total=3660 [2024-11-22 19:02:47,184 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 54 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 48 states have internal predecessors, (88), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:48,356 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2024-11-22 19:02:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 19:02:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 48 states have internal predecessors, (88), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2024-11-22 19:02:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:48,358 INFO L225 Difference]: With dead ends: 132 [2024-11-22 19:02:48,358 INFO L226 Difference]: Without dead ends: 132 [2024-11-22 19:02:48,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=281, Invalid=4692, Unknown=1, NotChecked=138, Total=5112 [2024-11-22 19:02:48,359 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:48,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1684 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1559 Invalid, 0 Unknown, 120 Unchecked, 0.7s Time] [2024-11-22 19:02:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-22 19:02:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2024-11-22 19:02:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 118 states have internal predecessors, (130), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 19:02:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2024-11-22 19:02:48,362 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 53 [2024-11-22 19:02:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:48,362 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2024-11-22 19:02:48,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 48 states have internal predecessors, (88), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:02:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2024-11-22 19:02:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-22 19:02:48,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:48,363 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:48,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 19:02:48,563 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,SelfDestructingSolverStorable15 [2024-11-22 19:02:48,564 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-22 19:02:48,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1354864450, now seen corresponding path program 1 times [2024-11-22 19:02:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:48,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137001913] [2024-11-22 19:02:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:02:49,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:49,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137001913] [2024-11-22 19:02:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137001913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:49,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424903962] [2024-11-22 19:02:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:49,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:49,112 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) [2024-11-22 19:02:49,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 19:02:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:49,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-22 19:02:49,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:49,252 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 [2024-11-22 19:02:49,339 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 [2024-11-22 19:02:49,457 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 4 [2024-11-22 19:02:49,462 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 9 treesize of output 3 [2024-11-22 19:02:49,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:02:49,641 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-22 19:02:49,642 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 1 case distinctions, treesize of input 27 treesize of output 30 [2024-11-22 19:02:49,647 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 12 treesize of output 4 [2024-11-22 19:02:49,659 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-22 19:02:49,659 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 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-22 19:02:49,667 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:49,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 19:02:49,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:02:49,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-22 19:02:50,032 INFO L349 Elim1Store]: treesize reduction 49, result has 43.0 percent of original size [2024-11-22 19:02:50,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 42 [2024-11-22 19:03:10,290 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 108 treesize of output 88 [2024-11-22 19:03:10,318 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:10,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 142 [2024-11-22 19:03:10,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:10,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 70 [2024-11-22 19:03:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:03:10,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:03:23,603 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1449 (Array Int Int)) (|ULTIMATE.start_sll_append_~last~0#1.base| Int) (v_ArrVal_1450 Int) (|ULTIMATE.start_sll_append_~head#1.offset| Int) (|v_ULTIMATE.start_sll_append_#t~ret7#1.base_30| Int) (|ULTIMATE.start_sll_append_~head#1.base| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |ULTIMATE.start_sll_append_~head#1.base|) |ULTIMATE.start_sll_append_~head#1.offset|))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_30|) 0)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_30| v_ArrVal_1449))) (store .cse0 |ULTIMATE.start_sll_append_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_sll_append_~last~0#1.base|) (+ .cse1 4) |v_ULTIMATE.start_sll_append_#t~ret7#1.base_30|))) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)) 0)) (< (select (store |c_#length| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_30| v_ArrVal_1450) |ULTIMATE.start_sll_append_~last~0#1.base|) (+ .cse1 8)) (= |v_ULTIMATE.start_sll_append_#t~ret7#1.base_30| 0)))) is different from false [2024-11-22 19:03:23,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424903962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:23,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:03:23,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 45 [2024-11-22 19:03:23,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899239071] [2024-11-22 19:03:23,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:03:23,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-22 19:03:23,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:03:23,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-22 19:03:23,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2693, Unknown=9, NotChecked=104, Total=2970 [2024-11-22 19:03:23,611 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-22 19:03:37,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:03:46,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:03:50,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:03:55,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]