./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/sll2c_append_equal.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 b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 07:01:17,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 07:01:17,456 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 07:01:17,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 07:01:17,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 07:01:17,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 07:01:17,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 07:01:17,492 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 07:01:17,493 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 07:01:17,493 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 07:01:17,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 07:01:17,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 07:01:17,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 07:01:17,495 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 07:01:17,496 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 07:01:17,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 07:01:17,496 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 07:01:17,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 07:01:17,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 07:01:17,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 07:01:17,498 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 07:01:17,500 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 07:01:17,501 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 07:01:17,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 07:01:17,501 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 07:01:17,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 07:01:17,502 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 07:01:17,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 07:01:17,502 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 07:01:17,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 07:01:17,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 07:01:17,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 07:01:17,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 07:01:17,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:01:17,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 07:01:17,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 07:01:17,505 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 07:01:17,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 07:01:17,505 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 07:01:17,505 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 07:01:17,506 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 07:01:17,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 07:01:17,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2024-11-19 07:01:17,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 07:01:17,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 07:01:17,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 07:01:17,793 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 07:01:17,794 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 07:01:17,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2024-11-19 07:01:19,177 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 07:01:19,408 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 07:01:19,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2024-11-19 07:01:19,421 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40523ff4/c84f1c2289484c40b0ce8c7ba9e6d1c6/FLAGa4fab7b16 [2024-11-19 07:01:19,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a40523ff4/c84f1c2289484c40b0ce8c7ba9e6d1c6 [2024-11-19 07:01:19,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 07:01:19,437 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 07:01:19,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 07:01:19,439 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 07:01:19,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 07:01:19,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:19,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f2e960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19, skipping insertion in model container [2024-11-19 07:01:19,446 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:19,492 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 07:01:19,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:01:19,852 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 07:01:19,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 07:01:19,942 INFO L204 MainTranslator]: Completed translation [2024-11-19 07:01:19,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19 WrapperNode [2024-11-19 07:01:19,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 07:01:19,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 07:01:19,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 07:01:19,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 07:01:19,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:19,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:19,987 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 147 [2024-11-19 07:01:19,988 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 07:01:19,989 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 07:01:19,989 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 07:01:19,989 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 07:01:20,000 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,005 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,039 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 13, 9]. 54 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 8 writes are split as follows [0, 7, 1]. [2024-11-19 07:01:20,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,071 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 07:01:20,072 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 07:01:20,072 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 07:01:20,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 07:01:20,073 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (1/1) ... [2024-11-19 07:01:20,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 07:01:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:20,112 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) [2024-11-19 07:01:20,118 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 [2024-11-19 07:01:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 07:01:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 07:01:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 07:01:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 07:01:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 07:01:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 07:01:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-19 07:01:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-19 07:01:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 07:01:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 07:01:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 07:01:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 07:01:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 07:01:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 07:01:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 07:01:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 07:01:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 07:01:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 07:01:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 07:01:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 07:01:20,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 07:01:20,298 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 07:01:20,300 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 07:01:20,753 INFO L? ?]: Removed 129 outVars from TransFormulas that were not future-live. [2024-11-19 07:01:20,754 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 07:01:20,773 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 07:01:20,773 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 07:01:20,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:20 BoogieIcfgContainer [2024-11-19 07:01:20,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 07:01:20,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 07:01:20,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 07:01:20,784 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 07:01:20,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:01:19" (1/3) ... [2024-11-19 07:01:20,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d96f851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:20, skipping insertion in model container [2024-11-19 07:01:20,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:19" (2/3) ... [2024-11-19 07:01:20,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d96f851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:20, skipping insertion in model container [2024-11-19 07:01:20,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:20" (3/3) ... [2024-11-19 07:01:20,787 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2024-11-19 07:01:20,804 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 07:01:20,805 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-19 07:01:20,860 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 07:01:20,868 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;@36d6cd5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 07:01:20,868 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-19 07:01:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 64 states have (on average 2.0) internal successors, (128), 114 states have internal predecessors, (128), 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) [2024-11-19 07:01:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 07:01:20,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:20,882 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 07:01:20,884 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:20,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 895306133, now seen corresponding path program 1 times [2024-11-19 07:01:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817242585] [2024-11-19 07:01:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817242585] [2024-11-19 07:01:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817242585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:21,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:01:21,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476282114] [2024-11-19 07:01:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:21,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:01:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:01:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:01:21,180 INFO L87 Difference]: Start difference. First operand has 119 states, 64 states have (on average 2.0) internal successors, (128), 114 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-19 07:01:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:21,291 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2024-11-19 07:01:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:01:21,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-19 07:01:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:21,301 INFO L225 Difference]: With dead ends: 116 [2024-11-19 07:01:21,302 INFO L226 Difference]: Without dead ends: 113 [2024-11-19 07:01:21,303 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 [2024-11-19 07:01:21,307 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:21,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 188 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-19 07:01:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-11-19 07:01:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 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) [2024-11-19 07:01:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2024-11-19 07:01:21,348 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 6 [2024-11-19 07:01:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:21,348 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2024-11-19 07:01:21,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-19 07:01:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2024-11-19 07:01:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-19 07:01:21,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:21,349 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 07:01:21,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 07:01:21,350 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:21,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash 895306134, now seen corresponding path program 1 times [2024-11-19 07:01:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099307042] [2024-11-19 07:01:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099307042] [2024-11-19 07:01:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099307042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:21,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:21,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 07:01:21,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460116130] [2024-11-19 07:01:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:21,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:01:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:01:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:01:21,517 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-19 07:01:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:21,615 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2024-11-19 07:01:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:01:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-19 07:01:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:21,617 INFO L225 Difference]: With dead ends: 111 [2024-11-19 07:01:21,617 INFO L226 Difference]: Without dead ends: 111 [2024-11-19 07:01:21,617 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 [2024-11-19 07:01:21,618 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:21,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 189 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:21,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-19 07:01:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-19 07:01:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:01:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2024-11-19 07:01:21,628 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 6 [2024-11-19 07:01:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:21,628 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2024-11-19 07:01:21,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-19 07:01:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2024-11-19 07:01:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 07:01:21,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:21,629 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:21,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 07:01:21,630 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:21,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -437780521, now seen corresponding path program 1 times [2024-11-19 07:01:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844649270] [2024-11-19 07:01:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844649270] [2024-11-19 07:01:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844649270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:21,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:21,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 07:01:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986426803] [2024-11-19 07:01:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:21,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 07:01:21,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 07:01:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 07:01:21,751 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2024-11-19 07:01:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:21,773 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2024-11-19 07:01:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 07:01:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2024-11-19 07:01:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:21,776 INFO L225 Difference]: With dead ends: 118 [2024-11-19 07:01:21,776 INFO L226 Difference]: Without dead ends: 118 [2024-11-19 07:01:21,776 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 [2024-11-19 07:01:21,777 INFO L432 NwaCegarLoop]: 117 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 229 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 [2024-11-19 07:01:21,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 229 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:01:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-19 07:01:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2024-11-19 07:01:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 107 states have internal predecessors, (114), 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) [2024-11-19 07:01:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2024-11-19 07:01:21,795 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 13 [2024-11-19 07:01:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:21,795 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2024-11-19 07:01:21,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2024-11-19 07:01:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2024-11-19 07:01:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 07:01:21,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:21,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:21,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 07:01:21,800 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:21,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1244940260, now seen corresponding path program 1 times [2024-11-19 07:01:21,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:21,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515336846] [2024-11-19 07:01:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:01:21,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515336846] [2024-11-19 07:01:21,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515336846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:21,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:01:21,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553678742] [2024-11-19 07:01:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:21,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:01:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:01:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:01:21,979 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:01:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:22,184 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2024-11-19 07:01:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:01:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-19 07:01:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:22,186 INFO L225 Difference]: With dead ends: 111 [2024-11-19 07:01:22,189 INFO L226 Difference]: Without dead ends: 111 [2024-11-19 07:01:22,189 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 [2024-11-19 07:01:22,191 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:22,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 355 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 07:01:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-19 07:01:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-19 07:01:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 07:01:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2024-11-19 07:01:22,199 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2024-11-19 07:01:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:22,199 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2024-11-19 07:01:22,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:01:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2024-11-19 07:01:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-19 07:01:22,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:22,200 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:22,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 07:01:22,208 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:22,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1244940259, now seen corresponding path program 1 times [2024-11-19 07:01:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:22,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628394033] [2024-11-19 07:01:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628394033] [2024-11-19 07:01:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628394033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:22,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:22,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:01:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673312975] [2024-11-19 07:01:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:22,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:01:22,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:01:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:01:22,470 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:01:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:22,628 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2024-11-19 07:01:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:01:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-19 07:01:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:22,630 INFO L225 Difference]: With dead ends: 110 [2024-11-19 07:01:22,630 INFO L226 Difference]: Without dead ends: 110 [2024-11-19 07:01:22,630 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 [2024-11-19 07:01:22,632 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 1 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:22,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 379 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-19 07:01:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-19 07:01:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 62 states have (on average 1.8064516129032258) internal successors, (112), 105 states have internal predecessors, (112), 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) [2024-11-19 07:01:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2024-11-19 07:01:22,647 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 22 [2024-11-19 07:01:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:22,647 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2024-11-19 07:01:22,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-19 07:01:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2024-11-19 07:01:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 07:01:22,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:22,651 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:22,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 07:01:22,651 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:22,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -972695867, now seen corresponding path program 1 times [2024-11-19 07:01:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:22,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541787248] [2024-11-19 07:01:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541787248] [2024-11-19 07:01:22,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541787248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330742261] [2024-11-19 07:01:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:22,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:22,882 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) [2024-11-19 07:01:22,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 07:01:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:23,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 07:01:23,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:23,051 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 [2024-11-19 07:01:23,106 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 [2024-11-19 07:01:23,183 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 07:01:23,184 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 [2024-11-19 07:01:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-19 07:01:23,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330742261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:23,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:23,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2024-11-19 07:01:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891344408] [2024-11-19 07:01:23,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:23,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 07:01:23,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 07:01:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-19 07:01:23,300 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:23,640 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2024-11-19 07:01:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:01:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-19 07:01:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:23,641 INFO L225 Difference]: With dead ends: 109 [2024-11-19 07:01:23,642 INFO L226 Difference]: Without dead ends: 109 [2024-11-19 07:01:23,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-19 07:01:23,644 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:23,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2024-11-19 07:01:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-19 07:01:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-19 07:01:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 104 states have internal predecessors, (111), 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) [2024-11-19 07:01:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2024-11-19 07:01:23,655 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 25 [2024-11-19 07:01:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:23,655 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2024-11-19 07:01:23,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2024-11-19 07:01:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-19 07:01:23,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:23,656 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:23,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 07:01:23,857 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 [2024-11-19 07:01:23,857 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:23,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -972695866, now seen corresponding path program 1 times [2024-11-19 07:01:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121982530] [2024-11-19 07:01:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121982530] [2024-11-19 07:01:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121982530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989791432] [2024-11-19 07:01:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:24,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:24,265 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) [2024-11-19 07:01:24,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 07:01:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:24,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 07:01:24,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:24,401 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 [2024-11-19 07:01:24,562 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:01:24,563 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 [2024-11-19 07:01:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:24,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989791432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:24,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-11-19 07:01:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581070894] [2024-11-19 07:01:24,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:24,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 07:01:24,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 07:01:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-19 07:01:24,770 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:01:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:25,280 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-19 07:01:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 07:01:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-19 07:01:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:25,283 INFO L225 Difference]: With dead ends: 110 [2024-11-19 07:01:25,283 INFO L226 Difference]: Without dead ends: 110 [2024-11-19 07:01:25,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-19 07:01:25,284 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 4 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:25,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 756 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 07:01:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-19 07:01:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2024-11-19 07:01:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 62 states have (on average 1.7741935483870968) internal successors, (110), 103 states have internal predecessors, (110), 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) [2024-11-19 07:01:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2024-11-19 07:01:25,293 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 25 [2024-11-19 07:01:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:25,293 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2024-11-19 07:01:25,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-19 07:01:25,294 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2024-11-19 07:01:25,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 07:01:25,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:25,297 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:25,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 07:01:25,501 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 [2024-11-19 07:01:25,502 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:25,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1467424927, now seen corresponding path program 1 times [2024-11-19 07:01:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125392911] [2024-11-19 07:01:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:01:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125392911] [2024-11-19 07:01:25,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125392911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781025933] [2024-11-19 07:01:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:25,968 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) [2024-11-19 07:01:25,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 07:01:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:26,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 07:01:26,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:26,104 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 [2024-11-19 07:01:26,113 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 [2024-11-19 07:01:26,158 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:01:26,159 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 [2024-11-19 07:01:26,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-19 07:01:26,248 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|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-19 07:01:26,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:26,290 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 [2024-11-19 07:01:26,344 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 [2024-11-19 07:01:26,367 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 07:01:26,368 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 [2024-11-19 07:01:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2024-11-19 07:01:26,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:26,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781025933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:26,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:26,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2024-11-19 07:01:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970647033] [2024-11-19 07:01:26,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:26,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 07:01:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 07:01:26,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=316, Unknown=2, NotChecked=74, Total=462 [2024-11-19 07:01:26,628 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 07:01:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:27,167 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2024-11-19 07:01:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:01:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-11-19 07:01:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:27,170 INFO L225 Difference]: With dead ends: 118 [2024-11-19 07:01:27,170 INFO L226 Difference]: Without dead ends: 118 [2024-11-19 07:01:27,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=415, Unknown=2, NotChecked=86, Total=600 [2024-11-19 07:01:27,171 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 107 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:27,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 468 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 596 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2024-11-19 07:01:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-19 07:01:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2024-11-19 07:01:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 95 states have internal predecessors, (102), 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) [2024-11-19 07:01:27,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2024-11-19 07:01:27,180 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 37 [2024-11-19 07:01:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:27,180 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2024-11-19 07:01:27,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 07:01:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2024-11-19 07:01:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-19 07:01:27,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:27,181 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:27,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 07:01:27,382 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 [2024-11-19 07:01:27,382 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:27,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1467424928, now seen corresponding path program 1 times [2024-11-19 07:01:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:27,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857327901] [2024-11-19 07:01:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:27,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:27,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857327901] [2024-11-19 07:01:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857327901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:27,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223399442] [2024-11-19 07:01:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:27,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:27,932 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) [2024-11-19 07:01:27,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 07:01:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:28,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 07:01:28,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:28,078 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 [2024-11-19 07:01:28,088 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 [2024-11-19 07:01:28,098 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 [2024-11-19 07:01:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:28,129 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 [2024-11-19 07:01:28,149 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 [2024-11-19 07:01:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:28,187 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 [2024-11-19 07:01:28,252 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 [2024-11-19 07:01:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:28,294 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 [2024-11-19 07:01:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 07:01:28,303 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:01:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223399442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:28,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:01:28,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2024-11-19 07:01:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012311757] [2024-11-19 07:01:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:28,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 07:01:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 07:01:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2024-11-19 07:01:28,305 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:28,446 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2024-11-19 07:01:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 07:01:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-19 07:01:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:28,447 INFO L225 Difference]: With dead ends: 95 [2024-11-19 07:01:28,448 INFO L226 Difference]: Without dead ends: 95 [2024-11-19 07:01:28,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-19 07:01:28,449 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 22 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:28,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2024-11-19 07:01:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-19 07:01:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-19 07:01:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.564516129032258) internal successors, (97), 90 states have internal predecessors, (97), 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) [2024-11-19 07:01:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2024-11-19 07:01:28,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 37 [2024-11-19 07:01:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:28,453 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2024-11-19 07:01:28,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2024-11-19 07:01:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 07:01:28,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:28,454 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:28,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:28,658 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 [2024-11-19 07:01:28,659 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:28,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1446081952, now seen corresponding path program 1 times [2024-11-19 07:01:28,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:28,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900598084] [2024-11-19 07:01:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 07:01:28,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900598084] [2024-11-19 07:01:28,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900598084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:28,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:28,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 07:01:28,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614113832] [2024-11-19 07:01:28,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:28,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:01:28,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:28,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:01:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:01:28,755 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 07:01:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:28,895 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2024-11-19 07:01:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:01:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-19 07:01:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:28,897 INFO L225 Difference]: With dead ends: 93 [2024-11-19 07:01:28,897 INFO L226 Difference]: Without dead ends: 93 [2024-11-19 07:01:28,897 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 [2024-11-19 07:01:28,898 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 19 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:28,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 286 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-19 07:01:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-19 07:01:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.532258064516129) internal successors, (95), 88 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) [2024-11-19 07:01:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2024-11-19 07:01:28,906 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 39 [2024-11-19 07:01:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:28,907 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2024-11-19 07:01:28,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 07:01:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2024-11-19 07:01:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-19 07:01:28,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:28,910 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:28,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 07:01:28,911 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:28,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1446081953, now seen corresponding path program 1 times [2024-11-19 07:01:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655290882] [2024-11-19 07:01:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 07:01:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:29,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655290882] [2024-11-19 07:01:29,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655290882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:29,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712320426] [2024-11-19 07:01:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:29,107 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) [2024-11-19 07:01:29,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 07:01:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:29,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 07:01:29,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:29,266 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 [2024-11-19 07:01:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 07:01:29,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:01:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712320426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:29,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:01:29,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-19 07:01:29,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466977652] [2024-11-19 07:01:29,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:29,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 07:01:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 07:01:29,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-19 07:01:29,350 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 07:01:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:29,469 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2024-11-19 07:01:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 07:01:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-19 07:01:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:29,471 INFO L225 Difference]: With dead ends: 91 [2024-11-19 07:01:29,471 INFO L226 Difference]: Without dead ends: 91 [2024-11-19 07:01:29,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-19 07:01:29,472 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 18 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:29,472 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 298 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-19 07:01:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-19 07:01:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.5) internal successors, (93), 86 states have internal predecessors, (93), 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) [2024-11-19 07:01:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-19 07:01:29,477 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 39 [2024-11-19 07:01:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:29,477 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-19 07:01:29,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-19 07:01:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-19 07:01:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 07:01:29,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:29,479 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:29,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:29,679 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,SelfDestructingSolverStorable10 [2024-11-19 07:01:29,680 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:29,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1884401435, now seen corresponding path program 1 times [2024-11-19 07:01:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082963949] [2024-11-19 07:01:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:01:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082963949] [2024-11-19 07:01:30,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082963949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:30,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323940751] [2024-11-19 07:01:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:30,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:30,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:30,013 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) [2024-11-19 07:01:30,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 07:01:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:30,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 07:01:30,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:30,331 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 [2024-11-19 07:01:30,335 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 [2024-11-19 07:01:30,360 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-19 07:01:30,361 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 [2024-11-19 07:01:30,400 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 [2024-11-19 07:01:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-19 07:01:30,404 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:01:30,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323940751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:30,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:01:30,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2024-11-19 07:01:30,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292731098] [2024-11-19 07:01:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:30,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 07:01:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 07:01:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2024-11-19 07:01:30,407 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:30,596 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2024-11-19 07:01:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 07:01:30,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-19 07:01:30,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:30,597 INFO L225 Difference]: With dead ends: 91 [2024-11-19 07:01:30,597 INFO L226 Difference]: Without dead ends: 91 [2024-11-19 07:01:30,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2024-11-19 07:01:30,598 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:30,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 321 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2024-11-19 07:01:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-19 07:01:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2024-11-19 07:01:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 85 states have internal predecessors, (93), 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) [2024-11-19 07:01:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-11-19 07:01:30,602 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 41 [2024-11-19 07:01:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:30,603 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-11-19 07:01:30,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-11-19 07:01:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-19 07:01:30,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:30,606 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:30,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 07:01:30,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:30,807 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:30,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:30,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1884401434, now seen corresponding path program 1 times [2024-11-19 07:01:30,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660102612] [2024-11-19 07:01:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:31,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660102612] [2024-11-19 07:01:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660102612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191422420] [2024-11-19 07:01:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:31,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:31,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:31,267 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) [2024-11-19 07:01:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 07:01:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:31,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-19 07:01:31,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:31,467 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 [2024-11-19 07:01:31,685 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 [2024-11-19 07:01:31,821 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:01:31,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-19 07:01:31,898 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 [2024-11-19 07:01:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:31,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:32,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191422420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:32,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:32,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2024-11-19 07:01:32,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280268620] [2024-11-19 07:01:32,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:32,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 07:01:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 07:01:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-11-19 07:01:32,141 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:01:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:33,132 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2024-11-19 07:01:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 07:01:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2024-11-19 07:01:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:33,133 INFO L225 Difference]: With dead ends: 104 [2024-11-19 07:01:33,133 INFO L226 Difference]: Without dead ends: 104 [2024-11-19 07:01:33,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2024-11-19 07:01:33,135 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:33,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1039 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 07:01:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-19 07:01:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2024-11-19 07:01:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 95 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) [2024-11-19 07:01:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2024-11-19 07:01:33,139 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 41 [2024-11-19 07:01:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:33,139 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2024-11-19 07:01:33,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:01:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2024-11-19 07:01:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-19 07:01:33,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:33,142 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:33,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 07:01:33,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:33,344 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:33,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1705464428, now seen corresponding path program 1 times [2024-11-19 07:01:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:33,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465958762] [2024-11-19 07:01:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 07:01:33,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:33,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465958762] [2024-11-19 07:01:33,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465958762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:33,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488461652] [2024-11-19 07:01:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:33,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:33,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:33,628 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) [2024-11-19 07:01:33,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 07:01:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:33,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 07:01:33,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:33,806 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 [2024-11-19 07:01:33,810 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 [2024-11-19 07:01:33,837 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 [2024-11-19 07:01:33,842 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 [2024-11-19 07:01:33,913 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:01:33,914 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 [2024-11-19 07:01:33,923 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 [2024-11-19 07:01:33,981 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 [2024-11-19 07:01:34,005 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 [2024-11-19 07:01:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:34,037 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 [2024-11-19 07:01:34,078 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 [2024-11-19 07:01:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:34,113 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 [2024-11-19 07:01:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 12 not checked. [2024-11-19 07:01:34,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:34,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488461652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:34,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:34,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-19 07:01:34,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856603243] [2024-11-19 07:01:34,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:34,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 07:01:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 07:01:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=330, Unknown=1, NotChecked=36, Total=420 [2024-11-19 07:01:34,274 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:01:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:34,788 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2024-11-19 07:01:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 07:01:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-11-19 07:01:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:34,789 INFO L225 Difference]: With dead ends: 99 [2024-11-19 07:01:34,789 INFO L226 Difference]: Without dead ends: 99 [2024-11-19 07:01:34,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=797, Unknown=1, NotChecked=58, Total=992 [2024-11-19 07:01:34,790 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:34,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 696 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 585 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2024-11-19 07:01:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-19 07:01:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-19 07:01:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 90 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) [2024-11-19 07:01:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2024-11-19 07:01:34,793 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 42 [2024-11-19 07:01:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:34,794 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2024-11-19 07:01:34,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-19 07:01:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2024-11-19 07:01:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:01:34,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:34,795 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:34,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:34,995 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,SelfDestructingSolverStorable13 [2024-11-19 07:01:34,996 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:34,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash 419913160, now seen corresponding path program 1 times [2024-11-19 07:01:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:34,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559072034] [2024-11-19 07:01:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:35,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:35,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559072034] [2024-11-19 07:01:35,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559072034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:35,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829026719] [2024-11-19 07:01:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:35,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:35,967 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) [2024-11-19 07:01:35,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 07:01:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:36,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-19 07:01:36,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:36,213 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 [2024-11-19 07:01:36,327 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:01:36,327 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 [2024-11-19 07:01:36,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:01:36,496 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:01:36,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-19 07:01:36,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2024-11-19 07:01:36,622 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 [2024-11-19 07:01:36,694 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$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 [2024-11-19 07:01:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:36,716 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 46 treesize of output 35 [2024-11-19 07:01:36,747 INFO L349 Elim1Store]: treesize reduction 88, result has 36.7 percent of original size [2024-11-19 07:01:36,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2024-11-19 07:01:36,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2024-11-19 07:01:36,895 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 46 treesize of output 26 [2024-11-19 07:01:36,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-19 07:01:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-19 07:01:37,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829026719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:37,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:37,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2024-11-19 07:01:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116041812] [2024-11-19 07:01:37,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:37,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 07:01:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:37,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 07:01:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1765, Unknown=1, NotChecked=84, Total=1980 [2024-11-19 07:01:37,121 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:38,139 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2024-11-19 07:01:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 07:01:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-19 07:01:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:38,141 INFO L225 Difference]: With dead ends: 130 [2024-11-19 07:01:38,141 INFO L226 Difference]: Without dead ends: 130 [2024-11-19 07:01:38,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=216, Invalid=2649, Unknown=1, NotChecked=104, Total=2970 [2024-11-19 07:01:38,143 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 135 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:38,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1312 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1450 Invalid, 0 Unknown, 129 Unchecked, 0.7s Time] [2024-11-19 07:01:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-19 07:01:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2024-11-19 07:01:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 108 states have internal predecessors, (118), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:01:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-11-19 07:01:38,151 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 46 [2024-11-19 07:01:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:38,152 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-11-19 07:01:38,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-11-19 07:01:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-19 07:01:38,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:38,155 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:38,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:38,355 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 [2024-11-19 07:01:38,356 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:38,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 419913161, now seen corresponding path program 1 times [2024-11-19 07:01:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395040288] [2024-11-19 07:01:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:40,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395040288] [2024-11-19 07:01:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395040288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641287277] [2024-11-19 07:01:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:40,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:40,146 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) [2024-11-19 07:01:40,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 07:01:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:40,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-19 07:01:40,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:40,328 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 [2024-11-19 07:01:40,333 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 [2024-11-19 07:01:40,620 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:01:40,620 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 [2024-11-19 07:01:40,640 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:01:40,641 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 [2024-11-19 07:01:40,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:01:40,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:01:40,893 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:01:40,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-19 07:01:40,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-19 07:01:41,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2024-11-19 07:01:41,090 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 15 treesize of output 3 [2024-11-19 07:01:41,095 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 [2024-11-19 07:01:41,099 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 [2024-11-19 07:01:41,235 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 [2024-11-19 07:01:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:41,258 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 63 treesize of output 46 [2024-11-19 07:01:41,274 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-19 07:01:41,274 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 32 treesize of output 34 [2024-11-19 07:01:41,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 07:01:41,287 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 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-19 07:01:41,381 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 60 treesize of output 44 [2024-11-19 07:01:41,526 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 48 treesize of output 28 [2024-11-19 07:01:41,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-19 07:01:41,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-19 07:01:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-19 07:01:41,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:42,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641287277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:42,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:42,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 48 [2024-11-19 07:01:42,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793612885] [2024-11-19 07:01:42,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:42,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-19 07:01:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-19 07:01:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2703, Unknown=1, NotChecked=104, Total=2970 [2024-11-19 07:01:42,038 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 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) [2024-11-19 07:01:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:43,661 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2024-11-19 07:01:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 07:01:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 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 46 [2024-11-19 07:01:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:43,663 INFO L225 Difference]: With dead ends: 132 [2024-11-19 07:01:43,663 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 07:01:43,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=292, Invalid=4681, Unknown=1, NotChecked=138, Total=5112 [2024-11-19 07:01:43,664 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 116 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:43,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1442 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1799 Invalid, 0 Unknown, 131 Unchecked, 0.9s Time] [2024-11-19 07:01:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 07:01:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2024-11-19 07:01:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 88 states have (on average 1.3181818181818181) internal successors, (116), 107 states have internal predecessors, (116), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:01:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2024-11-19 07:01:43,668 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 46 [2024-11-19 07:01:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:43,668 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2024-11-19 07:01:43,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 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) [2024-11-19 07:01:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2024-11-19 07:01:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 07:01:43,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:43,669 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:43,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:43,873 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 [2024-11-19 07:01:43,874 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:43,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash -938716811, now seen corresponding path program 1 times [2024-11-19 07:01:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361044455] [2024-11-19 07:01:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 07:01:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361044455] [2024-11-19 07:01:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361044455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:01:44,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 07:01:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 07:01:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341823763] [2024-11-19 07:01:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:01:44,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 07:01:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 07:01:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 07:01:44,098 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:44,232 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2024-11-19 07:01:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 07:01:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-11-19 07:01:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:44,234 INFO L225 Difference]: With dead ends: 124 [2024-11-19 07:01:44,234 INFO L226 Difference]: Without dead ends: 124 [2024-11-19 07:01:44,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-19 07:01:44,235 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 55 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:44,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 397 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 07:01:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-19 07:01:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2024-11-19 07:01:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 107 states have internal predecessors, (117), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:01:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2024-11-19 07:01:44,240 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 51 [2024-11-19 07:01:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:44,240 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2024-11-19 07:01:44,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 07:01:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2024-11-19 07:01:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 07:01:44,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:44,241 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:44,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 07:01:44,242 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:44,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -938716810, now seen corresponding path program 1 times [2024-11-19 07:01:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250243217] [2024-11-19 07:01:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 07:01:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:45,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250243217] [2024-11-19 07:01:45,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250243217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:45,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826216148] [2024-11-19 07:01:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:45,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:45,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:45,009 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) [2024-11-19 07:01:45,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 07:01:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:45,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 07:01:45,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:45,243 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 [2024-11-19 07:01:45,248 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 [2024-11-19 07:01:45,497 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 9 treesize of output 3 [2024-11-19 07:01:45,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-19 07:01:45,533 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14|) 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 [2024-11-19 07:01:45,575 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:01:45,575 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 [2024-11-19 07:01:45,578 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 [2024-11-19 07:01:45,636 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 [2024-11-19 07:01:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-19 07:01:45,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:45,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826216148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:45,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:45,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 29 [2024-11-19 07:01:45,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5043070] [2024-11-19 07:01:45,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:45,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-19 07:01:45,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-19 07:01:45,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=956, Unknown=1, NotChecked=62, Total=1122 [2024-11-19 07:01:45,826 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 07:01:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:46,401 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2024-11-19 07:01:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 07:01:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2024-11-19 07:01:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:46,402 INFO L225 Difference]: With dead ends: 126 [2024-11-19 07:01:46,402 INFO L226 Difference]: Without dead ends: 126 [2024-11-19 07:01:46,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1408, Unknown=1, NotChecked=76, Total=1640 [2024-11-19 07:01:46,403 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 117 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:46,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 758 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 918 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2024-11-19 07:01:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-19 07:01:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2024-11-19 07:01:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.3076923076923077) internal successors, (119), 109 states have internal predecessors, (119), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:01:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2024-11-19 07:01:46,407 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 51 [2024-11-19 07:01:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:46,407 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2024-11-19 07:01:46,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 07:01:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2024-11-19 07:01:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-19 07:01:46,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:46,408 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-11-19 07:01:46,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 07:01:46,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 07:01:46,609 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:46,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2094130885, now seen corresponding path program 2 times [2024-11-19 07:01:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:46,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948612955] [2024-11-19 07:01:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:01:46,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:46,642 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:01:46,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:01:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948612955] [2024-11-19 07:01:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948612955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099605445] [2024-11-19 07:01:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 07:01:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:47,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:01:47,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 07:01:48,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 07:01:48,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:01:48,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-19 07:01:48,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:48,050 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 [2024-11-19 07:01:48,055 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 [2024-11-19 07:01:48,089 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 [2024-11-19 07:01:48,091 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 [2024-11-19 07:01:48,236 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 07:01:48,237 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 17 treesize of output 21 [2024-11-19 07:01:48,244 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 [2024-11-19 07:01:48,387 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 11 treesize of output 7 [2024-11-19 07:01:48,390 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 [2024-11-19 07:01:48,504 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 07:01:48,504 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 14 treesize of output 13 [2024-11-19 07:01:48,546 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-19 07:01:48,546 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 16 treesize of output 18 [2024-11-19 07:01:48,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2024-11-19 07:01:48,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:01:48,848 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-19 07:01:48,848 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 39 [2024-11-19 07:01:48,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-19 07:01:49,102 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-19 07:01:49,102 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 28 [2024-11-19 07:01:49,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 15 treesize of output 7 [2024-11-19 07:01:49,112 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 11 treesize of output 3 [2024-11-19 07:01:49,115 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 [2024-11-19 07:01:49,400 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8| Int)) (and (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|) 0) 0) (not (= |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8| (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|) 0))) (<= (+ |c_#StackHeapBarrier| 1) |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|))) (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$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 [2024-11-19 07:01:49,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:49,470 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-19 07:01:49,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 52 [2024-11-19 07:01:49,493 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-19 07:01:49,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2024-11-19 07:01:49,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:01:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:49,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2024-11-19 07:01:49,623 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 [2024-11-19 07:01:50,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 07:01:50,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 54 [2024-11-19 07:01:50,018 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 07:01:50,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-19 07:01:50,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-19 07:01:50,299 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 07:01:50,300 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 31 treesize of output 14 [2024-11-19 07:01:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-19 07:01:50,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:50,570 INFO L349 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2024-11-19 07:01:50,571 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 24 treesize of output 23 [2024-11-19 07:01:50,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099605445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:50,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:50,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 57 [2024-11-19 07:01:50,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646277579] [2024-11-19 07:01:50,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:50,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-19 07:01:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:50,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-19 07:01:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3957, Unknown=1, NotChecked=126, Total=4290 [2024-11-19 07:01:50,979 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 57 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:53,721 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2024-11-19 07:01:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 07:01:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 5 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 51 [2024-11-19 07:01:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:53,722 INFO L225 Difference]: With dead ends: 132 [2024-11-19 07:01:53,723 INFO L226 Difference]: Without dead ends: 132 [2024-11-19 07:01:53,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=446, Invalid=6867, Unknown=1, NotChecked=168, Total=7482 [2024-11-19 07:01:53,725 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 144 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:53,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1590 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2202 Invalid, 0 Unknown, 125 Unchecked, 1.2s Time] [2024-11-19 07:01:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-19 07:01:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2024-11-19 07:01:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 100 states have (on average 1.28) internal successors, (128), 118 states have internal predecessors, (128), 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) [2024-11-19 07:01:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2024-11-19 07:01:53,730 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 51 [2024-11-19 07:01:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:53,731 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2024-11-19 07:01:53,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 49 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2024-11-19 07:01:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-19 07:01:53,732 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:53,732 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:53,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 07:01:53,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:53,933 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:53,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1577852825, now seen corresponding path program 1 times [2024-11-19 07:01:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737164951] [2024-11-19 07:01:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:53,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:54,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737164951] [2024-11-19 07:01:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737164951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185429357] [2024-11-19 07:01:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:01:54,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:54,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:54,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:01:54,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 07:01:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:01:55,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-19 07:01:55,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:01:55,247 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 [2024-11-19 07:01:55,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 07:01:55,456 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-19 07:01:55,457 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 17 treesize of output 21 [2024-11-19 07:01:55,568 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 25 treesize of output 13 [2024-11-19 07:01:55,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 07:01:55,793 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 17 treesize of output 3 [2024-11-19 07:01:55,796 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 [2024-11-19 07:01:55,939 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-19 07:01:55,939 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 20 treesize of output 22 [2024-11-19 07:01:55,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 07:01:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:01:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:01:56,255 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 0 case distinctions, treesize of input 45 treesize of output 21 [2024-11-19 07:01:56,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-19 07:01:56,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-19 07:01:56,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-19 07:01:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:01:56,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:01:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185429357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:57,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:01:57,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 51 [2024-11-19 07:01:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091372796] [2024-11-19 07:01:57,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:01:57,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-19 07:01:57,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:01:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-19 07:01:57,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3412, Unknown=69, NotChecked=0, Total=3660 [2024-11-19 07:01:57,221 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:01:59,526 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2024-11-19 07:01:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-19 07:01:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2024-11-19 07:01:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:01:59,527 INFO L225 Difference]: With dead ends: 156 [2024-11-19 07:01:59,527 INFO L226 Difference]: Without dead ends: 156 [2024-11-19 07:01:59,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=523, Invalid=8337, Unknown=70, NotChecked=0, Total=8930 [2024-11-19 07:01:59,530 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 133 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-19 07:01:59,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 2269 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-19 07:01:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-19 07:01:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2024-11-19 07:01:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 127 states have internal predecessors, (136), 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) [2024-11-19 07:01:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2024-11-19 07:01:59,534 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 55 [2024-11-19 07:01:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:01:59,535 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2024-11-19 07:01:59,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 43 states have internal predecessors, (91), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 07:01:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2024-11-19 07:01:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 07:01:59,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:01:59,536 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:01:59,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 07:01:59,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-19 07:01:59,736 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:01:59,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:01:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash -771449702, now seen corresponding path program 3 times [2024-11-19 07:01:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:01:59,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71052568] [2024-11-19 07:01:59,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 07:01:59,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:01:59,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 07:01:59,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:01:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-19 07:01:59,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:01:59,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71052568] [2024-11-19 07:01:59,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71052568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:01:59,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245949484] [2024-11-19 07:01:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 07:01:59,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:01:59,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:01:59,828 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:01:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 07:02:00,067 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 07:02:00,067 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 07:02:00,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 07:02:00,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 07:02:00,085 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 07:02:00,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245949484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 07:02:00,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 07:02:00,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-19 07:02:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644163501] [2024-11-19 07:02:00,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 07:02:00,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 07:02:00,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 07:02:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:00,086 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:00,096 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2024-11-19 07:02:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 07:02:00,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-11-19 07:02:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:00,097 INFO L225 Difference]: With dead ends: 92 [2024-11-19 07:02:00,097 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 07:02:00,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 07:02:00,098 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:00,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 07:02:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 07:02:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-19 07:02:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 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) [2024-11-19 07:02:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2024-11-19 07:02:00,106 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 58 [2024-11-19 07:02:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:00,106 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2024-11-19 07:02:00,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-19 07:02:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2024-11-19 07:02:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-19 07:02:00,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:00,107 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:00,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:00,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:00,308 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:02:00,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash 237986620, now seen corresponding path program 1 times [2024-11-19 07:02:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264120352] [2024-11-19 07:02:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:01,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264120352] [2024-11-19 07:02:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264120352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539663606] [2024-11-19 07:02:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:01,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:01,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:01,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:01,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 07:02:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:02,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-11-19 07:02:02,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:02,371 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 [2024-11-19 07:02:02,537 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 [2024-11-19 07:02:02,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:02,623 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 [2024-11-19 07:02:02,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:02:02,723 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 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-19 07:02:02,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:02:02,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 07:02:03,018 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 [2024-11-19 07:02:03,020 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 11 treesize of output 3 [2024-11-19 07:02:03,023 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 11 treesize of output 3 [2024-11-19 07:02:03,313 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:02:03,313 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 [2024-11-19 07:02:03,318 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 20 treesize of output 15 [2024-11-19 07:02:03,331 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 20 treesize of output 15 [2024-11-19 07:02:04,155 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 36 treesize of output 12 [2024-11-19 07:02:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:02:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 07:02:04,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 10 [2024-11-19 07:02:04,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:04,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-19 07:02:04,782 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 20 treesize of output 15 [2024-11-19 07:02:04,898 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 19 treesize of output 11 [2024-11-19 07:02:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:05,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:05,988 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 71 treesize of output 59 [2024-11-19 07:02:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539663606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:06,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:06,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 69 [2024-11-19 07:02:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371154241] [2024-11-19 07:02:06,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:06,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-19 07:02:06,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-19 07:02:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=6884, Unknown=53, NotChecked=0, Total=7310 [2024-11-19 07:02:06,826 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 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) [2024-11-19 07:02:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:09,800 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2024-11-19 07:02:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 07:02:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 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 60 [2024-11-19 07:02:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:09,801 INFO L225 Difference]: With dead ends: 96 [2024-11-19 07:02:09,802 INFO L226 Difference]: Without dead ends: 96 [2024-11-19 07:02:09,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=727, Invalid=12558, Unknown=55, NotChecked=0, Total=13340 [2024-11-19 07:02:09,804 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 77 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:09,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1644 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 07:02:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-19 07:02:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2024-11-19 07:02:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.25) internal successors, (90), 86 states have internal predecessors, (90), 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) [2024-11-19 07:02:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2024-11-19 07:02:09,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 60 [2024-11-19 07:02:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:09,808 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2024-11-19 07:02:09,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 60 states have internal predecessors, (102), 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) [2024-11-19 07:02:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2024-11-19 07:02:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 07:02:09,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:09,808 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:09,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:10,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:10,009 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:02:10,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1067048647, now seen corresponding path program 1 times [2024-11-19 07:02:10,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:10,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492991587] [2024-11-19 07:02:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:10,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:11,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492991587] [2024-11-19 07:02:11,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492991587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571555323] [2024-11-19 07:02:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:11,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:11,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 07:02:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:11,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-19 07:02:11,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:11,872 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 [2024-11-19 07:02:11,958 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:11,959 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 [2024-11-19 07:02:12,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:02:12,088 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:12,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-19 07:02:12,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2024-11-19 07:02:12,229 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 [2024-11-19 07:02:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 07:02:12,409 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 46 treesize of output 35 [2024-11-19 07:02:12,437 INFO L349 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2024-11-19 07:02:12,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 65 [2024-11-19 07:02:12,690 INFO L349 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2024-11-19 07:02:12,691 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 65 treesize of output 56 [2024-11-19 07:02:12,830 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-11-19 07:02:12,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 88 [2024-11-19 07:02:12,859 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 [2024-11-19 07:02:13,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 104 [2024-11-19 07:02:13,016 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 103 treesize of output 75 [2024-11-19 07:02:13,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 51 [2024-11-19 07:02:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:13,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571555323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:14,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:14,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27] total 54 [2024-11-19 07:02:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692636339] [2024-11-19 07:02:14,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:14,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-19 07:02:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-19 07:02:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3180, Unknown=52, NotChecked=0, Total=3422 [2024-11-19 07:02:14,048 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 55 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:02:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:15,506 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2024-11-19 07:02:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-19 07:02:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2024-11-19 07:02:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:15,508 INFO L225 Difference]: With dead ends: 100 [2024-11-19 07:02:15,508 INFO L226 Difference]: Without dead ends: 100 [2024-11-19 07:02:15,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=361, Invalid=4988, Unknown=53, NotChecked=0, Total=5402 [2024-11-19 07:02:15,509 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 111 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:15,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1296 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-19 07:02:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-19 07:02:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-11-19 07:02:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.263157894736842) internal successors, (96), 90 states have internal predecessors, (96), 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) [2024-11-19 07:02:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2024-11-19 07:02:15,512 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 62 [2024-11-19 07:02:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:15,512 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2024-11-19 07:02:15,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 48 states have internal predecessors, (103), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 07:02:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2024-11-19 07:02:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 07:02:15,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:15,513 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:15,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 07:02:15,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 07:02:15,713 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:02:15,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:15,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1067048648, now seen corresponding path program 1 times [2024-11-19 07:02:15,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:15,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480385305] [2024-11-19 07:02:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:15,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:18,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480385305] [2024-11-19 07:02:18,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480385305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731897367] [2024-11-19 07:02:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:18,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:18,504 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:18,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 07:02:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:18,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-19 07:02:18,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:18,730 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 [2024-11-19 07:02:18,734 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 [2024-11-19 07:02:19,028 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:19,028 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 [2024-11-19 07:02:19,031 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 [2024-11-19 07:02:19,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:02:19,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:02:19,249 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:19,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-19 07:02:19,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-19 07:02:19,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2024-11-19 07:02:19,437 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 15 treesize of output 3 [2024-11-19 07:02:19,441 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 9 treesize of output 3 [2024-11-19 07:02:19,445 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 [2024-11-19 07:02:19,760 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-19 07:02:19,760 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 46 treesize of output 43 [2024-11-19 07:02:19,772 INFO L349 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2024-11-19 07:02:19,772 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 20 treesize of output 25 [2024-11-19 07:02:19,784 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 26 treesize of output 14 [2024-11-19 07:02:19,795 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:02:19,796 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 [2024-11-19 07:02:19,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-19 07:02:20,100 INFO L349 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2024-11-19 07:02:20,100 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 49 treesize of output 52 [2024-11-19 07:02:20,115 INFO L349 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2024-11-19 07:02:20,115 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 27 treesize of output 26 [2024-11-19 07:02:20,236 INFO L349 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2024-11-19 07:02:20,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 87 [2024-11-19 07:02:20,250 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-19 07:02:20,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2024-11-19 07:02:20,257 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 [2024-11-19 07:02:20,261 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 18 treesize of output 14 [2024-11-19 07:02:20,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 44 [2024-11-19 07:02:20,361 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 44 treesize of output 28 [2024-11-19 07:02:20,539 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 [2024-11-19 07:02:20,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-19 07:02:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:20,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:20,986 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_2396 (Array Int Int)) (v_ArrVal_2395 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2396) .cse0) .cse1) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2395) .cse0) .cse1)))) (forall ((v_ArrVal_2396 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2396) .cse0) .cse1) 4))))) is different from false [2024-11-19 07:02:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731897367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:26,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 27] total 61 [2024-11-19 07:02:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722846559] [2024-11-19 07:02:26,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:26,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-19 07:02:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-19 07:02:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4563, Unknown=32, NotChecked=136, Total=4970 [2024-11-19 07:02:26,279 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 62 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 54 states have internal predecessors, (108), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 07:02:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 07:02:29,025 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2024-11-19 07:02:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 07:02:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 54 states have internal predecessors, (108), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2024-11-19 07:02:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 07:02:29,026 INFO L225 Difference]: With dead ends: 102 [2024-11-19 07:02:29,026 INFO L226 Difference]: Without dead ends: 102 [2024-11-19 07:02:29,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=516, Invalid=8012, Unknown=32, NotChecked=182, Total=8742 [2024-11-19 07:02:29,027 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 93 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 07:02:29,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1702 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-19 07:02:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-19 07:02:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-19 07:02:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 92 states have internal predecessors, (98), 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) [2024-11-19 07:02:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-11-19 07:02:29,030 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 62 [2024-11-19 07:02:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 07:02:29,031 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-11-19 07:02:29,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 54 states have internal predecessors, (108), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-19 07:02:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-11-19 07:02:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-19 07:02:29,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 07:02:29,032 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 07:02:29,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 07:02:29,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:29,233 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 07:02:29,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 07:02:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1392344834, now seen corresponding path program 1 times [2024-11-19 07:02:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 07:02:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666604321] [2024-11-19 07:02:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 07:02:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 07:02:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 07:02:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666604321] [2024-11-19 07:02:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666604321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831983358] [2024-11-19 07:02:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 07:02:30,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 07:02:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 07:02:30,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 07:02:30,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 07:02:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 07:02:30,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-19 07:02:30,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 07:02:30,996 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 [2024-11-19 07:02:31,064 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 07:02:31,064 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 [2024-11-19 07:02:31,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 07:02:31,204 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-19 07:02:31,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-11-19 07:02:31,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-19 07:02:31,248 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 [2024-11-19 07:02:31,292 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-19 07:02:31,292 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 [2024-11-19 07:02:35,302 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse1) .cse0)) (exists ((|v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| |c_#memory_$Pointer$#1.base|))) (and (= |c_#memory_$Pointer$#1.base| (store |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| .cse2 (select |c_#memory_$Pointer$#1.base| .cse2))) (not (= (select (select |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| .cse0) .cse1) .cse0)) (= .cse2 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)))))) (not (= |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| .cse0)))) is different from false [2024-11-19 07:02:35,304 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse1) .cse0)) (exists ((|v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| (Array Int (Array Int Int)))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| |c_#memory_$Pointer$#1.base|))) (and (= |c_#memory_$Pointer$#1.base| (store |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| .cse2 (select |c_#memory_$Pointer$#1.base| .cse2))) (not (= (select (select |v_old(#memory_$Pointer$#1.base)_AFTER_CALL_53| .cse0) .cse1) .cse0)) (= .cse2 |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base|)))))) (not (= |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| .cse0)))) is different from true [2024-11-19 07:02:35,366 INFO L349 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2024-11-19 07:02:35,367 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 32 treesize of output 47 [2024-11-19 07:02:35,436 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-11-19 07:02:35,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 49 [2024-11-19 07:02:35,447 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 [2024-11-19 07:02:35,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2024-11-19 07:02:35,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-11-19 07:02:35,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-19 07:02:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 07:02:35,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 07:02:35,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831983358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 07:02:35,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 07:02:35,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 45 [2024-11-19 07:02:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208087743] [2024-11-19 07:02:35,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 07:02:35,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-19 07:02:35,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 07:02:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-19 07:02:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2066, Unknown=45, NotChecked=92, Total=2352 [2024-11-19 07:02:35,884 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 45 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 38 states have internal predecessors, (93), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)