./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.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 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 18:54:13,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 18:54:13,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 18:54:13,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 18:54:13,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 18:54:13,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 18:54:13,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 18:54:13,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 18:54:13,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 18:54:13,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 18:54:13,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 18:54:13,470 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 18:54:13,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 18:54:13,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 18:54:13,472 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 18:54:13,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 18:54:13,472 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 18:54:13,472 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 18:54:13,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 18:54:13,476 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 18:54:13,476 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 18:54:13,477 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 18:54:13,477 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 18:54:13,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 18:54:13,477 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 18:54:13,478 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 18:54:13,478 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 18:54:13,478 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 18:54:13,478 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 18:54:13,479 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 18:54:13,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 18:54:13,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 18:54:13,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 18:54:13,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:54:13,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 18:54:13,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 18:54:13,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 18:54:13,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 18:54:13,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 18:54:13,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 18:54:13,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 18:54:13,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 18:54:13,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2024-11-22 18:54:13,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 18:54:13,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 18:54:13,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 18:54:13,701 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 18:54:13,702 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 18:54:13,702 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2024-11-22 18:54:14,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 18:54:15,060 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 18:54:15,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2024-11-22 18:54:15,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27cffe40/622b193a516745f5903424b7b862ef5f/FLAG23050eb61 [2024-11-22 18:54:15,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27cffe40/622b193a516745f5903424b7b862ef5f [2024-11-22 18:54:15,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 18:54:15,084 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 18:54:15,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 18:54:15,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 18:54:15,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 18:54:15,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691e3af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15, skipping insertion in model container [2024-11-22 18:54:15,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,123 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 18:54:15,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:54:15,370 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 18:54:15,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 18:54:15,437 INFO L204 MainTranslator]: Completed translation [2024-11-22 18:54:15,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15 WrapperNode [2024-11-22 18:54:15,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 18:54:15,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 18:54:15,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 18:54:15,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 18:54:15,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,480 INFO L138 Inliner]: procedures = 129, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 213 [2024-11-22 18:54:15,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 18:54:15,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 18:54:15,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 18:54:15,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 18:54:15,490 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,493 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,512 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 8, 8, 18, 6]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 0, 1]. The 10 writes are split as follows [0, 1, 1, 7, 1]. [2024-11-22 18:54:15,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,524 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,527 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,534 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 18:54:15,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 18:54:15,535 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 18:54:15,535 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 18:54:15,536 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (1/1) ... [2024-11-22 18:54:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 18:54:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:54:15,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 18:54:15,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 18:54:15,599 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-11-22 18:54:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 18:54:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 18:54:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 18:54:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-22 18:54:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-22 18:54:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2024-11-22 18:54:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2024-11-22 18:54:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-22 18:54:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2024-11-22 18:54:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2024-11-22 18:54:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 18:54:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 18:54:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 18:54:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 18:54:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-22 18:54:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2024-11-22 18:54:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2024-11-22 18:54:15,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 18:54:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 18:54:15,726 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 18:54:15,728 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 18:54:16,143 INFO L? ?]: Removed 194 outVars from TransFormulas that were not future-live. [2024-11-22 18:54:16,143 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 18:54:16,162 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 18:54:16,164 INFO L316 CfgBuilder]: Removed 33 assume(true) statements. [2024-11-22 18:54:16,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:54:16 BoogieIcfgContainer [2024-11-22 18:54:16,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 18:54:16,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 18:54:16,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 18:54:16,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 18:54:16,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:54:15" (1/3) ... [2024-11-22 18:54:16,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61898bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:54:16, skipping insertion in model container [2024-11-22 18:54:16,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:54:15" (2/3) ... [2024-11-22 18:54:16,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61898bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:54:16, skipping insertion in model container [2024-11-22 18:54:16,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:54:16" (3/3) ... [2024-11-22 18:54:16,172 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2024-11-22 18:54:16,186 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 18:54:16,186 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2024-11-22 18:54:16,229 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 18:54:16,234 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;@731a4ae9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 18:54:16,234 INFO L334 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2024-11-22 18:54:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 123 states have (on average 2.073170731707317) internal successors, (255), 211 states have internal predecessors, (255), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-22 18:54:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-22 18:54:16,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:16,243 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-22 18:54:16,243 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:16,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash 6467046, now seen corresponding path program 1 times [2024-11-22 18:54:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:16,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659817782] [2024-11-22 18:54:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:16,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:16,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659817782] [2024-11-22 18:54:16,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659817782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:16,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:16,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:54:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321540213] [2024-11-22 18:54:16,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:16,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 18:54:16,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 18:54:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 18:54:16,410 INFO L87 Difference]: Start difference. First operand has 225 states, 123 states have (on average 2.073170731707317) internal successors, (255), 211 states have internal predecessors, (255), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:16,436 INFO L93 Difference]: Finished difference Result 222 states and 243 transitions. [2024-11-22 18:54:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 18:54:16,438 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-22 18:54:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:16,445 INFO L225 Difference]: With dead ends: 222 [2024-11-22 18:54:16,445 INFO L226 Difference]: Without dead ends: 220 [2024-11-22 18:54:16,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 18:54:16,450 INFO L432 NwaCegarLoop]: 243 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:16,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 18:54:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-22 18:54:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-22 18:54:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 117 states have (on average 1.8376068376068375) internal successors, (215), 206 states have internal predecessors, (215), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2024-11-22 18:54:16,488 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 4 [2024-11-22 18:54:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:16,488 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2024-11-22 18:54:16,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2024-11-22 18:54:16,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-22 18:54:16,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:16,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 18:54:16,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 18:54:16,489 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:16,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1928521722, now seen corresponding path program 1 times [2024-11-22 18:54:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:16,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549271421] [2024-11-22 18:54:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:16,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:16,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:16,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549271421] [2024-11-22 18:54:16,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549271421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:16,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:16,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:54:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074944821] [2024-11-22 18:54:16,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:16,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:54:16,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:54:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:54:16,614 INFO L87 Difference]: Start difference. First operand 220 states and 241 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) [2024-11-22 18:54:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:16,757 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2024-11-22 18:54:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:54:16,758 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 [2024-11-22 18:54:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:16,759 INFO L225 Difference]: With dead ends: 218 [2024-11-22 18:54:16,759 INFO L226 Difference]: Without dead ends: 218 [2024-11-22 18:54:16,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:54:16,760 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 2 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:16,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:54:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-22 18:54:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-22 18:54:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 117 states have (on average 1.8205128205128205) internal successors, (213), 204 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 239 transitions. [2024-11-22 18:54:16,776 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 239 transitions. Word has length 6 [2024-11-22 18:54:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:16,777 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 239 transitions. [2024-11-22 18:54:16,777 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) [2024-11-22 18:54:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 239 transitions. [2024-11-22 18:54:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-22 18:54:16,777 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:16,777 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 18:54:16,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 18:54:16,779 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:16,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1928521723, now seen corresponding path program 1 times [2024-11-22 18:54:16,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919678374] [2024-11-22 18:54:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:16,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:16,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919678374] [2024-11-22 18:54:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919678374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:16,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:16,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 18:54:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547252249] [2024-11-22 18:54:16,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:16,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 18:54:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 18:54:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:54:16,886 INFO L87 Difference]: Start difference. First operand 218 states and 239 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) [2024-11-22 18:54:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:16,992 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2024-11-22 18:54:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 18:54:16,993 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 [2024-11-22 18:54:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:16,994 INFO L225 Difference]: With dead ends: 216 [2024-11-22 18:54:16,994 INFO L226 Difference]: Without dead ends: 216 [2024-11-22 18:54:16,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 18:54:16,995 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:16,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 388 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:54:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-22 18:54:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-11-22 18:54:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 117 states have (on average 1.8034188034188035) internal successors, (211), 202 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2024-11-22 18:54:17,013 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 6 [2024-11-22 18:54:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:17,013 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2024-11-22 18:54:17,014 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) [2024-11-22 18:54:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2024-11-22 18:54:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:54:17,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:17,014 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:17,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 18:54:17,014 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:17,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1860239838, now seen corresponding path program 1 times [2024-11-22 18:54:17,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:17,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535870381] [2024-11-22 18:54:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:17,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:17,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535870381] [2024-11-22 18:54:17,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535870381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:17,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:17,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:54:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182632608] [2024-11-22 18:54:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:17,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:54:17,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:17,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:54:17,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:54:17,210 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:17,438 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2024-11-22 18:54:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:54:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 10 [2024-11-22 18:54:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:17,439 INFO L225 Difference]: With dead ends: 211 [2024-11-22 18:54:17,440 INFO L226 Difference]: Without dead ends: 211 [2024-11-22 18:54:17,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:54:17,441 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 40 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:17,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 747 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 18:54:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-22 18:54:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-11-22 18:54:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 117 states have (on average 1.7606837606837606) internal successors, (206), 197 states have internal predecessors, (206), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2024-11-22 18:54:17,447 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 10 [2024-11-22 18:54:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:17,448 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2024-11-22 18:54:17,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2024-11-22 18:54:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-22 18:54:17,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:17,448 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:17,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 18:54:17,449 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:17,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1860239839, now seen corresponding path program 1 times [2024-11-22 18:54:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541930478] [2024-11-22 18:54:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541930478] [2024-11-22 18:54:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541930478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:17,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 18:54:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719389612] [2024-11-22 18:54:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:17,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 18:54:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 18:54:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 18:54:17,604 INFO L87 Difference]: Start difference. First operand 211 states and 232 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:17,816 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2024-11-22 18:54:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:54:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-11-22 18:54:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:17,817 INFO L225 Difference]: With dead ends: 206 [2024-11-22 18:54:17,817 INFO L226 Difference]: Without dead ends: 206 [2024-11-22 18:54:17,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:54:17,818 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 36 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:17,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 18:54:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-22 18:54:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-22 18:54:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 117 states have (on average 1.7179487179487178) internal successors, (201), 192 states have internal predecessors, (201), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 227 transitions. [2024-11-22 18:54:17,824 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 227 transitions. Word has length 10 [2024-11-22 18:54:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:17,824 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 227 transitions. [2024-11-22 18:54:17,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 227 transitions. [2024-11-22 18:54:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:54:17,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:17,825 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:17,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 18:54:17,825 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:17,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1832860119, now seen corresponding path program 1 times [2024-11-22 18:54:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:17,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193284036] [2024-11-22 18:54:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:17,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:17,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:17,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193284036] [2024-11-22 18:54:17,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193284036] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:17,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:17,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 18:54:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429426782] [2024-11-22 18:54:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:17,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 18:54:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:17,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 18:54:17,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 18:54:17,889 INFO L87 Difference]: Start difference. First operand 206 states and 227 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:18,021 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2024-11-22 18:54:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:54:18,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2024-11-22 18:54:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:18,023 INFO L225 Difference]: With dead ends: 205 [2024-11-22 18:54:18,023 INFO L226 Difference]: Without dead ends: 205 [2024-11-22 18:54:18,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 18:54:18,026 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 3 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:18,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 648 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:54:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-22 18:54:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-22 18:54:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 117 states have (on average 1.7094017094017093) internal successors, (200), 191 states have internal predecessors, (200), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2024-11-22 18:54:18,030 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 11 [2024-11-22 18:54:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:18,031 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2024-11-22 18:54:18,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2024-11-22 18:54:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-22 18:54:18,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:18,031 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:18,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 18:54:18,031 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:18,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1832860120, now seen corresponding path program 1 times [2024-11-22 18:54:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:18,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403764755] [2024-11-22 18:54:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403764755] [2024-11-22 18:54:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403764755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 18:54:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652638769] [2024-11-22 18:54:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:18,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:54:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:54:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:54:18,113 INFO L87 Difference]: Start difference. First operand 205 states and 226 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:18,218 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2024-11-22 18:54:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 18:54:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 11 [2024-11-22 18:54:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:18,220 INFO L225 Difference]: With dead ends: 204 [2024-11-22 18:54:18,220 INFO L226 Difference]: Without dead ends: 204 [2024-11-22 18:54:18,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 18:54:18,220 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:18,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 730 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 18:54:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-22 18:54:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-11-22 18:54:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 117 states have (on average 1.7008547008547008) internal successors, (199), 190 states have internal predecessors, (199), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2024-11-22 18:54:18,225 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 11 [2024-11-22 18:54:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:18,225 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2024-11-22 18:54:18,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 18:54:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2024-11-22 18:54:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 18:54:18,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:18,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:18,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 18:54:18,226 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:18,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash -502411055, now seen corresponding path program 1 times [2024-11-22 18:54:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003659591] [2024-11-22 18:54:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:18,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003659591] [2024-11-22 18:54:18,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003659591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:18,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:18,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 18:54:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263298882] [2024-11-22 18:54:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:18,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 18:54:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 18:54:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:54:18,406 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 18:54:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:18,755 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2024-11-22 18:54:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 18:54:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 19 [2024-11-22 18:54:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:18,757 INFO L225 Difference]: With dead ends: 203 [2024-11-22 18:54:18,757 INFO L226 Difference]: Without dead ends: 203 [2024-11-22 18:54:18,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:54:18,759 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 146 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:18,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 495 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:54:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-22 18:54:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-11-22 18:54:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 117 states have (on average 1.6923076923076923) internal successors, (198), 189 states have internal predecessors, (198), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2024-11-22 18:54:18,766 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 19 [2024-11-22 18:54:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:18,767 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2024-11-22 18:54:18,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 18:54:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2024-11-22 18:54:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-22 18:54:18,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:18,770 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:18,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 18:54:18,771 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:18,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash -502411054, now seen corresponding path program 1 times [2024-11-22 18:54:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:18,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542534047] [2024-11-22 18:54:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:18,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:19,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:19,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542534047] [2024-11-22 18:54:19,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542534047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:19,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 18:54:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846022069] [2024-11-22 18:54:19,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:19,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 18:54:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 18:54:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:54:19,011 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 18:54:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:19,352 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2024-11-22 18:54:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 18:54:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 19 [2024-11-22 18:54:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:19,353 INFO L225 Difference]: With dead ends: 202 [2024-11-22 18:54:19,353 INFO L226 Difference]: Without dead ends: 202 [2024-11-22 18:54:19,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-22 18:54:19,354 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 55 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:19,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 593 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:54:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-22 18:54:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2024-11-22 18:54:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 117 states have (on average 1.6837606837606838) internal successors, (197), 188 states have internal predecessors, (197), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2024-11-22 18:54:19,358 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 19 [2024-11-22 18:54:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:19,358 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2024-11-22 18:54:19,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 18:54:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2024-11-22 18:54:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 18:54:19,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:19,359 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:19,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 18:54:19,359 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:19,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 45731933, now seen corresponding path program 1 times [2024-11-22 18:54:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:19,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710531534] [2024-11-22 18:54:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 18:54:19,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:19,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710531534] [2024-11-22 18:54:19,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710531534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:54:19,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484770953] [2024-11-22 18:54:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:19,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:54:19,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:54:19,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:54:19,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 18:54:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:19,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 18:54:19,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:54:19,866 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-22 18:54:19,866 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 21 treesize of output 13 [2024-11-22 18:54:19,895 INFO L349 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2024-11-22 18:54:19,895 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 26 treesize of output 11 [2024-11-22 18:54:19,965 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1))) is different from true [2024-11-22 18:54:19,993 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-22 18:54:19,993 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 22 [2024-11-22 18:54:20,107 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2024-11-22 18:54:20,108 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 3 case distinctions, treesize of input 21 treesize of output 38 [2024-11-22 18:54:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 18:54:20,187 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 18:54:20,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484770953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:20,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 18:54:20,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 14 [2024-11-22 18:54:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937666063] [2024-11-22 18:54:20,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:20,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 18:54:20,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 18:54:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=145, Unknown=1, NotChecked=24, Total=210 [2024-11-22 18:54:20,188 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 18:54:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:20,637 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2024-11-22 18:54:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 18:54:20,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-22 18:54:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:20,640 INFO L225 Difference]: With dead ends: 203 [2024-11-22 18:54:20,640 INFO L226 Difference]: Without dead ends: 203 [2024-11-22 18:54:20,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2024-11-22 18:54:20,641 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 57 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:20,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 709 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 753 Invalid, 0 Unknown, 260 Unchecked, 0.4s Time] [2024-11-22 18:54:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-22 18:54:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-11-22 18:54:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 117 states have (on average 1.6752136752136753) internal successors, (196), 187 states have internal predecessors, (196), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-22 18:54:20,648 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 37 [2024-11-22 18:54:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:20,649 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-22 18:54:20,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 18:54:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-22 18:54:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 18:54:20,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:20,650 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:20,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 18:54:20,854 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,SelfDestructingSolverStorable9 [2024-11-22 18:54:20,855 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:20,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 45731934, now seen corresponding path program 1 times [2024-11-22 18:54:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:20,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959657467] [2024-11-22 18:54:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 18:54:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959657467] [2024-11-22 18:54:21,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959657467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:21,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:21,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 18:54:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104465744] [2024-11-22 18:54:21,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:21,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 18:54:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 18:54:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-22 18:54:21,489 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 18:54:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:21,940 INFO L93 Difference]: Finished difference Result 214 states and 241 transitions. [2024-11-22 18:54:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 18:54:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-22 18:54:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:21,941 INFO L225 Difference]: With dead ends: 214 [2024-11-22 18:54:21,942 INFO L226 Difference]: Without dead ends: 214 [2024-11-22 18:54:21,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-22 18:54:21,942 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 56 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:21,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 563 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 18:54:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-22 18:54:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2024-11-22 18:54:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 126 states have (on average 1.6428571428571428) internal successors, (207), 196 states have internal predecessors, (207), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-22 18:54:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 237 transitions. [2024-11-22 18:54:21,949 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 237 transitions. Word has length 37 [2024-11-22 18:54:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:21,949 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 237 transitions. [2024-11-22 18:54:21,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 18:54:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 237 transitions. [2024-11-22 18:54:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-22 18:54:21,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:21,950 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 18:54:21,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 18:54:21,951 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:21,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:21,951 INFO L85 PathProgramCache]: Analyzing trace with hash -99509326, now seen corresponding path program 1 times [2024-11-22 18:54:21,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:21,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996108992] [2024-11-22 18:54:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:21,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 18:54:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996108992] [2024-11-22 18:54:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996108992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:54:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92858513] [2024-11-22 18:54:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:54:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:54:22,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:54:22,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 18:54:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:22,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-22 18:54:22,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:54:22,990 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-22 18:54:22,991 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 2 case distinctions, treesize of input 12 treesize of output 16 [2024-11-22 18:54:23,031 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-22 18:54:23,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 10 [2024-11-22 18:54:23,048 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) is different from true [2024-11-22 18:54:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,107 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2024-11-22 18:54:23,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 29 [2024-11-22 18:54:23,161 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:23,161 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 7 [2024-11-22 18:54:23,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,286 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-22 18:54:23,378 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:23,378 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 7 [2024-11-22 18:54:23,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 18:54:23,455 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2024-11-22 18:54:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,527 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:23,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-22 18:54:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:23,533 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 [2024-11-22 18:54:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 28 not checked. [2024-11-22 18:54:23,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:54:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92858513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:54:23,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 18:54:23,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2024-11-22 18:54:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578662754] [2024-11-22 18:54:23,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 18:54:23,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 18:54:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 18:54:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=598, Unknown=2, NotChecked=102, Total=812 [2024-11-22 18:54:23,725 INFO L87 Difference]: Start difference. First operand 212 states and 237 transitions. Second operand has 27 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 25 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 18:54:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:24,935 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2024-11-22 18:54:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 18:54:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 25 states have internal predecessors, (91), 6 states have call successors, (6), 2 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 52 [2024-11-22 18:54:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:24,937 INFO L225 Difference]: With dead ends: 218 [2024-11-22 18:54:24,937 INFO L226 Difference]: Without dead ends: 218 [2024-11-22 18:54:24,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1056, Unknown=2, NotChecked=138, Total=1406 [2024-11-22 18:54:24,938 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 137 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:24,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 842 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1386 Invalid, 0 Unknown, 430 Unchecked, 0.8s Time] [2024-11-22 18:54:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-22 18:54:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2024-11-22 18:54:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 186 states have internal predecessors, (195), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2024-11-22 18:54:24,943 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 52 [2024-11-22 18:54:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:24,944 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2024-11-22 18:54:24,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 25 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 18:54:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2024-11-22 18:54:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 18:54:24,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:24,945 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:54:24,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 18:54:25,145 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,SelfDestructingSolverStorable11 [2024-11-22 18:54:25,146 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:25,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1491506621, now seen corresponding path program 1 times [2024-11-22 18:54:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:25,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405066015] [2024-11-22 18:54:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:25,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 18:54:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405066015] [2024-11-22 18:54:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405066015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 18:54:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955608104] [2024-11-22 18:54:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:25,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 18:54:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 18:54:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:54:25,419 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-11-22 18:54:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:25,745 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2024-11-22 18:54:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 18:54:25,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 58 [2024-11-22 18:54:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:25,746 INFO L225 Difference]: With dead ends: 205 [2024-11-22 18:54:25,746 INFO L226 Difference]: Without dead ends: 205 [2024-11-22 18:54:25,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-22 18:54:25,747 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 176 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:25,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 379 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:54:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-22 18:54:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2024-11-22 18:54:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 117 states have (on average 1.606837606837607) internal successors, (188), 179 states have internal predecessors, (188), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-22 18:54:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2024-11-22 18:54:25,750 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 58 [2024-11-22 18:54:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:25,751 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2024-11-22 18:54:25,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-11-22 18:54:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2024-11-22 18:54:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 18:54:25,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:25,751 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:54:25,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 18:54:25,752 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:25,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1491506620, now seen corresponding path program 1 times [2024-11-22 18:54:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690518507] [2024-11-22 18:54:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 18:54:26,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:26,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690518507] [2024-11-22 18:54:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690518507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:26,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:26,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 18:54:26,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045583538] [2024-11-22 18:54:26,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:26,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 18:54:26,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:26,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 18:54:26,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 18:54:26,024 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-11-22 18:54:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:26,379 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2024-11-22 18:54:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 18:54:26,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 58 [2024-11-22 18:54:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:26,381 INFO L225 Difference]: With dead ends: 204 [2024-11-22 18:54:26,381 INFO L226 Difference]: Without dead ends: 204 [2024-11-22 18:54:26,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-22 18:54:26,382 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 190 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:26,383 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 269 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:54:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-22 18:54:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 195. [2024-11-22 18:54:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 124 states have (on average 1.532258064516129) internal successors, (190), 180 states have internal predecessors, (190), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-22 18:54:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 218 transitions. [2024-11-22 18:54:26,389 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 218 transitions. Word has length 58 [2024-11-22 18:54:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:26,390 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 218 transitions. [2024-11-22 18:54:26,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2024-11-22 18:54:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 218 transitions. [2024-11-22 18:54:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-22 18:54:26,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:26,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:54:26,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 18:54:26,392 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:26,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1007935234, now seen corresponding path program 1 times [2024-11-22 18:54:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204677219] [2024-11-22 18:54:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 18:54:26,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:26,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204677219] [2024-11-22 18:54:26,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204677219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:26,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 18:54:26,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 18:54:26,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44751236] [2024-11-22 18:54:26,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:26,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 18:54:26,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 18:54:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-22 18:54:26,752 INFO L87 Difference]: Start difference. First operand 195 states and 218 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:54:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:27,061 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2024-11-22 18:54:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 18:54:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-11-22 18:54:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:27,064 INFO L225 Difference]: With dead ends: 200 [2024-11-22 18:54:27,064 INFO L226 Difference]: Without dead ends: 200 [2024-11-22 18:54:27,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-22 18:54:27,064 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 199 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:27,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 284 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 18:54:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-22 18:54:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2024-11-22 18:54:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 173 states have internal predecessors, (183), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-22 18:54:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 211 transitions. [2024-11-22 18:54:27,068 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 211 transitions. Word has length 59 [2024-11-22 18:54:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:27,068 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 211 transitions. [2024-11-22 18:54:27,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 18:54:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 211 transitions. [2024-11-22 18:54:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-22 18:54:27,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:27,069 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:54:27,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 18:54:27,069 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:27,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1007935235, now seen corresponding path program 1 times [2024-11-22 18:54:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310471920] [2024-11-22 18:54:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 18:54:27,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310471920] [2024-11-22 18:54:27,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310471920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:54:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947646410] [2024-11-22 18:54:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:27,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:54:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:54:27,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:54:27,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 18:54:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:27,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 18:54:27,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:54:27,607 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 18:54:27,607 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 1 case distinctions, treesize of input 9 treesize of output 11 [2024-11-22 18:54:27,622 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-22 18:54:27,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 14 treesize of output 1 [2024-11-22 18:54:27,633 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-22 18:54:27,634 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 1 case distinctions, treesize of input 9 treesize of output 1 [2024-11-22 18:54:27,658 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,662 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 7 [2024-11-22 18:54:27,668 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (<= (+ 1 |chain_node_alloc_node_~ptr~0#1.base|) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) is different from true [2024-11-22 18:54:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,729 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-22 18:54:27,780 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,780 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 7 [2024-11-22 18:54:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,846 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-22 18:54:27,927 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,927 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 7 [2024-11-22 18:54:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:54:27,993 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 18:54:27,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2024-11-22 18:54:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-22 18:54:28,038 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 18:54:28,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947646410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 18:54:28,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 18:54:28,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2024-11-22 18:54:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230892430] [2024-11-22 18:54:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 18:54:28,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 18:54:28,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 18:54:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=144, Unknown=1, NotChecked=24, Total=210 [2024-11-22 18:54:28,039 INFO L87 Difference]: Start difference. First operand 188 states and 211 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 18:54:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:54:28,261 INFO L93 Difference]: Finished difference Result 265 states and 299 transitions. [2024-11-22 18:54:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 18:54:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-22 18:54:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:54:28,263 INFO L225 Difference]: With dead ends: 265 [2024-11-22 18:54:28,263 INFO L226 Difference]: Without dead ends: 265 [2024-11-22 18:54:28,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=144, Unknown=1, NotChecked=24, Total=210 [2024-11-22 18:54:28,263 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 129 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 18:54:28,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 271 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 310 Invalid, 0 Unknown, 337 Unchecked, 0.2s Time] [2024-11-22 18:54:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-22 18:54:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 242. [2024-11-22 18:54:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 173 states have (on average 1.4855491329479769) internal successors, (257), 222 states have internal predecessors, (257), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:54:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 295 transitions. [2024-11-22 18:54:28,268 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 295 transitions. Word has length 59 [2024-11-22 18:54:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:54:28,268 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 295 transitions. [2024-11-22 18:54:28,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 18:54:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 295 transitions. [2024-11-22 18:54:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-22 18:54:28,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:54:28,269 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:54:28,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 18:54:28,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:54:28,470 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:54:28,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:54:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1384284051, now seen corresponding path program 1 times [2024-11-22 18:54:28,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:54:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268700371] [2024-11-22 18:54:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:54:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 18:54:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:54:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268700371] [2024-11-22 18:54:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268700371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:54:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749083542] [2024-11-22 18:54:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:54:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:54:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:54:28,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:54:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 18:54:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:54:28,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-22 18:54:29,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:54:29,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:54:29,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 18:54:29,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-22 18:54:29,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-22 18:54:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:54:29,374 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:54:29,381 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-22 18:54:29,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 23 [2024-11-22 18:54:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 18:54:29,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:54:29,420 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 30 treesize of output 26 [2024-11-22 18:54:29,523 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 30 treesize of output 26 [2024-11-22 18:54:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 18:54:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749083542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:54:29,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:54:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 27 [2024-11-22 18:54:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115214628] [2024-11-22 18:54:29,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:54:29,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 18:54:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:54:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 18:54:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-22 18:54:29,650 INFO L87 Difference]: Start difference. First operand 242 states and 295 transitions. Second operand has 27 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 9 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-22 18:54:33,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:37,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:41,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:45,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:49,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:53,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:54:57,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:01,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:05,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:09,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:55:10,313 INFO L93 Difference]: Finished difference Result 295 states and 350 transitions. [2024-11-22 18:55:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 18:55:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 9 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 66 [2024-11-22 18:55:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:55:10,316 INFO L225 Difference]: With dead ends: 295 [2024-11-22 18:55:10,316 INFO L226 Difference]: Without dead ends: 295 [2024-11-22 18:55:10,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=1987, Unknown=0, NotChecked=0, Total=2256 [2024-11-22 18:55:10,318 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 403 mSDsluCounter, 1977 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 29 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.4s IncrementalHoareTripleChecker+Time [2024-11-22 18:55:10,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 2149 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 717 Invalid, 10 Unknown, 0 Unchecked, 40.4s Time] [2024-11-22 18:55:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-22 18:55:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 268. [2024-11-22 18:55:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 197 states have (on average 1.4619289340101522) internal successors, (288), 246 states have internal predecessors, (288), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:55:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 326 transitions. [2024-11-22 18:55:10,323 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 326 transitions. Word has length 66 [2024-11-22 18:55:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:55:10,325 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 326 transitions. [2024-11-22 18:55:10,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 9 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-22 18:55:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 326 transitions. [2024-11-22 18:55:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-22 18:55:10,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:55:10,325 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:55:10,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 18:55:10,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 18:55:10,526 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:55:10,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:55:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1374309996, now seen corresponding path program 1 times [2024-11-22 18:55:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:55:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729961984] [2024-11-22 18:55:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:10,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:55:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 18:55:11,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:55:11,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729961984] [2024-11-22 18:55:11,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729961984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:55:11,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454793655] [2024-11-22 18:55:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:11,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:55:11,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:55:11,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:55:11,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 18:55:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:11,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-22 18:55:11,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:55:11,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:11,636 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:11,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:55:11,638 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 26 treesize of output 17 [2024-11-22 18:55:11,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:11,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 18:55:11,737 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#valid| |chain_node_alloc_node_~ptr~0#1.base|))))) is different from true [2024-11-22 18:55:11,781 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-22 18:55:11,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-22 18:55:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 18:55:11,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 18:55:11,889 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:11,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:55:11,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2024-11-22 18:55:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-22 18:55:11,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:55:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454793655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:55:12,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 18:55:12,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2024-11-22 18:55:12,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504194482] [2024-11-22 18:55:12,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 18:55:12,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 18:55:12,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:55:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 18:55:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=856, Unknown=1, NotChecked=58, Total=992 [2024-11-22 18:55:12,016 INFO L87 Difference]: Start difference. First operand 268 states and 326 transitions. Second operand has 31 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 18:55:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:55:13,639 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2024-11-22 18:55:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 18:55:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2024-11-22 18:55:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:55:13,642 INFO L225 Difference]: With dead ends: 274 [2024-11-22 18:55:13,642 INFO L226 Difference]: Without dead ends: 274 [2024-11-22 18:55:13,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=1577, Unknown=1, NotChecked=80, Total=1806 [2024-11-22 18:55:13,643 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 280 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-22 18:55:13,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1885 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3047 Invalid, 0 Unknown, 213 Unchecked, 1.3s Time] [2024-11-22 18:55:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-22 18:55:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2024-11-22 18:55:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 197 states have (on average 1.4568527918781726) internal successors, (287), 246 states have internal predecessors, (287), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-22 18:55:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 325 transitions. [2024-11-22 18:55:13,649 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 325 transitions. Word has length 66 [2024-11-22 18:55:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:55:13,649 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 325 transitions. [2024-11-22 18:55:13,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.3) internal successors, (99), 29 states have internal predecessors, (99), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 18:55:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 325 transitions. [2024-11-22 18:55:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-22 18:55:13,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:55:13,652 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:55:13,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 18:55:13,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 18:55:13,853 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:55:13,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:55:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1374309997, now seen corresponding path program 1 times [2024-11-22 18:55:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:55:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705680069] [2024-11-22 18:55:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:55:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 18:55:14,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:55:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705680069] [2024-11-22 18:55:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705680069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:55:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317646166] [2024-11-22 18:55:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:14,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:55:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:55:14,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:55:14,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 18:55:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:14,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-22 18:55:14,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:55:14,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 18:55:14,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 18:55:14,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 18:55:14,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:15,035 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:15,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-22 18:55:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:15,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 18:55:15,043 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 15 treesize of output 10 [2024-11-22 18:55:15,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:15,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 18:55:15,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 18:55:15,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 18:55:15,236 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_12|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-22 18:55:15,266 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 18:55:15,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 18:55:15,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 18:55:15,370 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:15,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-22 18:55:15,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:15,374 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:15,377 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-22 18:55:15,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 13 [2024-11-22 18:55:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 18:55:15,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:55:15,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317646166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:55:15,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 18:55:15,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2024-11-22 18:55:15,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683818772] [2024-11-22 18:55:15,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 18:55:15,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 18:55:15,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:55:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 18:55:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1231, Unknown=1, NotChecked=70, Total=1406 [2024-11-22 18:55:15,581 INFO L87 Difference]: Start difference. First operand 268 states and 325 transitions. Second operand has 33 states, 32 states have (on average 3.09375) internal successors, (99), 30 states have internal predecessors, (99), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 18:55:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 18:55:17,815 INFO L93 Difference]: Finished difference Result 378 states and 423 transitions. [2024-11-22 18:55:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 18:55:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 30 states have internal predecessors, (99), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2024-11-22 18:55:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 18:55:17,817 INFO L225 Difference]: With dead ends: 378 [2024-11-22 18:55:17,817 INFO L226 Difference]: Without dead ends: 378 [2024-11-22 18:55:17,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=2939, Unknown=1, NotChecked=110, Total=3306 [2024-11-22 18:55:17,817 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 387 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 3459 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 3900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-22 18:55:17,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1581 Invalid, 3900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3459 Invalid, 0 Unknown, 386 Unchecked, 1.6s Time] [2024-11-22 18:55:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-11-22 18:55:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 323. [2024-11-22 18:55:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 247 states have (on average 1.4493927125506072) internal successors, (358), 297 states have internal predecessors, (358), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-22 18:55:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 398 transitions. [2024-11-22 18:55:17,823 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 398 transitions. Word has length 66 [2024-11-22 18:55:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 18:55:17,823 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 398 transitions. [2024-11-22 18:55:17,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.09375) internal successors, (99), 30 states have internal predecessors, (99), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 18:55:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 398 transitions. [2024-11-22 18:55:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-22 18:55:17,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 18:55:17,824 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-22 18:55:17,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 18:55:18,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:55:18,025 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-22 18:55:18,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 18:55:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2128471491, now seen corresponding path program 1 times [2024-11-22 18:55:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 18:55:18,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493194777] [2024-11-22 18:55:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:18,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 18:55:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 18:55:18,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 18:55:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493194777] [2024-11-22 18:55:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493194777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 18:55:18,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679387620] [2024-11-22 18:55:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 18:55:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 18:55:18,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 18:55:18,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 18:55:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 18:55:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 18:55:18,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-22 18:55:18,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 18:55:18,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:18,553 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 [2024-11-22 18:55:18,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 18:55:18,859 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:18,859 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 18:55:18,868 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-22 18:55:18,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 23 [2024-11-22 18:55:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 18:55:18,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 18:55:19,009 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 30 treesize of output 26 [2024-11-22 18:55:19,158 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 30 treesize of output 26 [2024-11-22 18:55:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 18:55:19,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679387620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 18:55:19,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 18:55:19,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 16] total 31 [2024-11-22 18:55:19,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942436037] [2024-11-22 18:55:19,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 18:55:19,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 18:55:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 18:55:19,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 18:55:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2024-11-22 18:55:19,265 INFO L87 Difference]: Start difference. First operand 323 states and 398 transitions. Second operand has 31 states, 27 states have (on average 4.555555555555555) internal successors, (123), 30 states have internal predecessors, (123), 8 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-22 18:55:23,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:27,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:31,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:35,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 18:55:39,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-22 18:55:43,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-22 18:55:47,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-22 18:55:51,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]