./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 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd --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 0.3.0-dev-826ab2b [2024-11-13 14:55:55,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:55:55,283 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:55:55,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:55:55,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:55:55,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:55:55,334 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:55:55,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:55:55,335 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:55:55,335 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:55:55,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:55:55,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:55:55,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:55:55,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:55:55,338 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:55:55,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:55:55,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:55:55,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:55:55,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:55:55,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:55:55,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:55:55,342 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd 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 [2024-11-13 14:55:55,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:55:55,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:55:55,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:55:55,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:55:55,750 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:55:55,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i Unable to find full path for "g++" [2024-11-13 14:55:57,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:55:58,174 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:55:58,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2024-11-13 14:55:58,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/data/495468ad2/244fb4915b5d45aea46e9f8615b7f6b2/FLAG9dbd167f0 [2024-11-13 14:55:58,223 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/data/495468ad2/244fb4915b5d45aea46e9f8615b7f6b2 [2024-11-13 14:55:58,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:55:58,229 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:55:58,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:55:58,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:55:58,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:55:58,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:58,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7294cc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58, skipping insertion in model container [2024-11-13 14:55:58,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:58,292 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:55:58,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:55:58,801 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:55:58,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:55:58,914 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:55:58,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58 WrapperNode [2024-11-13 14:55:58,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:55:58,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:55:58,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:55:58,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:55:58,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:58,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:58,985 INFO L138 Inliner]: procedures = 129, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 200 [2024-11-13 14:55:58,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:55:58,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:55:58,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:55:58,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:55:58,995 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:58,995 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,041 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 8, 6, 8, 18]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1, 0, 0]. The 10 writes are split as follows [0, 1, 1, 1, 7]. [2024-11-13 14:55:59,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,041 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,071 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:55:59,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:55:59,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:55:59,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:55:59,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (1/1) ... [2024-11-13 14:55:59,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:55:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:55:59,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:55:59,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:55:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-11-13 14:55:59,176 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-11-13 14:55:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 14:55:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-13 14:55:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-13 14:55:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 14:55:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2024-11-13 14:55:59,179 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-13 14:55:59,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2024-11-13 14:55:59,180 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2024-11-13 14:55:59,180 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2024-11-13 14:55:59,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:55:59,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:55:59,362 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:55:59,364 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:56:00,249 INFO L? ?]: Removed 194 outVars from TransFormulas that were not future-live. [2024-11-13 14:56:00,249 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:56:00,273 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:56:00,273 INFO L316 CfgBuilder]: Removed 33 assume(true) statements. [2024-11-13 14:56:00,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:56:00 BoogieIcfgContainer [2024-11-13 14:56:00,274 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:56:00,276 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:56:00,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:56:00,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:56:00,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:55:58" (1/3) ... [2024-11-13 14:56:00,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebd10da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:56:00, skipping insertion in model container [2024-11-13 14:56:00,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:55:58" (2/3) ... [2024-11-13 14:56:00,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebd10da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:56:00, skipping insertion in model container [2024-11-13 14:56:00,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:56:00" (3/3) ... [2024-11-13 14:56:00,286 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2024-11-13 14:56:00,302 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:56:00,303 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll_to_dll_rev-2.i that has 5 procedures, 225 locations, 1 initial locations, 21 loop locations, and 83 error locations. [2024-11-13 14:56:00,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:56:00,383 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;@1f88b57d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:56:00,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2024-11-13 14:56:00,390 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) [2024-11-13 14:56:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 14:56:00,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:00,400 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 14:56:00,401 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)] === [2024-11-13 14:56:00,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash 6467014, now seen corresponding path program 1 times [2024-11-13 14:56:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:00,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203278956] [2024-11-13 14:56:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:00,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203278956] [2024-11-13 14:56:00,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203278956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:00,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:00,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:56:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125258406] [2024-11-13 14:56:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:00,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 14:56:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:00,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 14:56:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 14:56:00,632 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) [2024-11-13 14:56:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:00,672 INFO L93 Difference]: Finished difference Result 222 states and 243 transitions. [2024-11-13 14:56:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 14:56:00,674 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 [2024-11-13 14:56:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:00,685 INFO L225 Difference]: With dead ends: 222 [2024-11-13 14:56:00,685 INFO L226 Difference]: Without dead ends: 220 [2024-11-13 14:56:00,687 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 [2024-11-13 14:56:00,690 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 [2024-11-13 14:56:00,693 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] [2024-11-13 14:56:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-13 14:56:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-13 14:56:00,750 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) [2024-11-13 14:56:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2024-11-13 14:56:00,759 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 4 [2024-11-13 14:56:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:00,759 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2024-11-13 14:56:00,760 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) [2024-11-13 14:56:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2024-11-13 14:56:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 14:56:00,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:00,760 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 14:56:00,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:56:00,761 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)] === [2024-11-13 14:56:00,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1928194021, now seen corresponding path program 1 times [2024-11-13 14:56:00,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:00,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281714448] [2024-11-13 14:56:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:00,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281714448] [2024-11-13 14:56:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281714448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:00,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:00,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:56:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027320955] [2024-11-13 14:56:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:00,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:56:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:56:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:56:00,949 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) [2024-11-13 14:56:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:01,214 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2024-11-13 14:56:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:56:01,214 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 [2024-11-13 14:56:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:01,217 INFO L225 Difference]: With dead ends: 218 [2024-11-13 14:56:01,218 INFO L226 Difference]: Without dead ends: 218 [2024-11-13 14:56:01,218 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 [2024-11-13 14:56:01,219 INFO L432 NwaCegarLoop]: 233 mSDtfsCounter, 2 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:01,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:56:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-13 14:56:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-13 14:56:01,240 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) [2024-11-13 14:56:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 239 transitions. [2024-11-13 14:56:01,247 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 239 transitions. Word has length 6 [2024-11-13 14:56:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:01,248 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 239 transitions. [2024-11-13 14:56:01,248 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) [2024-11-13 14:56:01,248 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 239 transitions. [2024-11-13 14:56:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 14:56:01,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:01,249 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 14:56:01,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:56:01,249 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)] === [2024-11-13 14:56:01,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:01,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1928194022, now seen corresponding path program 1 times [2024-11-13 14:56:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713502870] [2024-11-13 14:56:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:01,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:01,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713502870] [2024-11-13 14:56:01,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713502870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:01,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:01,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:56:01,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542798116] [2024-11-13 14:56:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:01,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:56:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:56:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:56:01,454 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) [2024-11-13 14:56:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:01,649 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2024-11-13 14:56:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:56:01,649 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 [2024-11-13 14:56:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:01,651 INFO L225 Difference]: With dead ends: 216 [2024-11-13 14:56:01,651 INFO L226 Difference]: Without dead ends: 216 [2024-11-13 14:56:01,651 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 [2024-11-13 14:56:01,652 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:01,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 388 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:56:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-13 14:56:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-11-13 14:56:01,673 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) [2024-11-13 14:56:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2024-11-13 14:56:01,676 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 6 [2024-11-13 14:56:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:01,676 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2024-11-13 14:56:01,676 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) [2024-11-13 14:56:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2024-11-13 14:56:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:56:01,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:01,677 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:01,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:56:01,677 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)] === [2024-11-13 14:56:01,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash -130804663, now seen corresponding path program 1 times [2024-11-13 14:56:01,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:01,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054197442] [2024-11-13 14:56:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:01,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:02,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:02,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054197442] [2024-11-13 14:56:02,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054197442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:02,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:02,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:56:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852128471] [2024-11-13 14:56:02,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:02,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:56:02,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:56:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:56:02,024 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) [2024-11-13 14:56:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:02,442 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2024-11-13 14:56:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:56:02,442 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 [2024-11-13 14:56:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:02,444 INFO L225 Difference]: With dead ends: 211 [2024-11-13 14:56:02,444 INFO L226 Difference]: Without dead ends: 211 [2024-11-13 14:56:02,444 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 [2024-11-13 14:56:02,445 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 40 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:02,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 747 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:56:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-13 14:56:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2024-11-13 14:56:02,458 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) [2024-11-13 14:56:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2024-11-13 14:56:02,463 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 10 [2024-11-13 14:56:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:02,463 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2024-11-13 14:56:02,463 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) [2024-11-13 14:56:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2024-11-13 14:56:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 14:56:02,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:02,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:02,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 14:56:02,464 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)] === [2024-11-13 14:56:02,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash -130804662, now seen corresponding path program 1 times [2024-11-13 14:56:02,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:02,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049674195] [2024-11-13 14:56:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049674195] [2024-11-13 14:56:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049674195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:02,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:02,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:56:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714532616] [2024-11-13 14:56:02,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:02,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:56:02,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:56:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:56:02,878 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) [2024-11-13 14:56:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:03,293 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2024-11-13 14:56:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:56:03,294 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 [2024-11-13 14:56:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:03,295 INFO L225 Difference]: With dead ends: 206 [2024-11-13 14:56:03,295 INFO L226 Difference]: Without dead ends: 206 [2024-11-13 14:56:03,295 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 [2024-11-13 14:56:03,296 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 36 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:03,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 550 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:56:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-13 14:56:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-13 14:56:03,303 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) [2024-11-13 14:56:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 227 transitions. [2024-11-13 14:56:03,304 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 227 transitions. Word has length 10 [2024-11-13 14:56:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:03,305 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 227 transitions. [2024-11-13 14:56:03,305 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) [2024-11-13 14:56:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 227 transitions. [2024-11-13 14:56:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:56:03,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:03,305 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:03,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 14:56:03,306 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)] === [2024-11-13 14:56:03,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 240022732, now seen corresponding path program 1 times [2024-11-13 14:56:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947296409] [2024-11-13 14:56:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:03,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947296409] [2024-11-13 14:56:03,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947296409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:03,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:03,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:56:03,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492076264] [2024-11-13 14:56:03,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:03,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:56:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:03,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:56:03,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:56:03,400 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) [2024-11-13 14:56:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:03,686 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2024-11-13 14:56:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:56:03,686 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 [2024-11-13 14:56:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:03,687 INFO L225 Difference]: With dead ends: 205 [2024-11-13 14:56:03,688 INFO L226 Difference]: Without dead ends: 205 [2024-11-13 14:56:03,688 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 [2024-11-13 14:56:03,689 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 3 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:03,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 648 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 14:56:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-13 14:56:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-13 14:56:03,701 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) [2024-11-13 14:56:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2024-11-13 14:56:03,703 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 11 [2024-11-13 14:56:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:03,704 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2024-11-13 14:56:03,704 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) [2024-11-13 14:56:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2024-11-13 14:56:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 14:56:03,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:03,705 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:03,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:56:03,706 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)] === [2024-11-13 14:56:03,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 240022733, now seen corresponding path program 1 times [2024-11-13 14:56:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264496244] [2024-11-13 14:56:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:03,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:03,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264496244] [2024-11-13 14:56:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264496244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:03,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:56:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138425530] [2024-11-13 14:56:03,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:03,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:56:03,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:56:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 14:56:03,936 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) [2024-11-13 14:56:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:04,137 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2024-11-13 14:56:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:56:04,138 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 [2024-11-13 14:56:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:04,139 INFO L225 Difference]: With dead ends: 204 [2024-11-13 14:56:04,139 INFO L226 Difference]: Without dead ends: 204 [2024-11-13 14:56:04,140 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 [2024-11-13 14:56:04,140 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:04,141 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 730 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 14:56:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-13 14:56:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2024-11-13 14:56:04,150 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) [2024-11-13 14:56:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2024-11-13 14:56:04,153 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 11 [2024-11-13 14:56:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:04,153 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2024-11-13 14:56:04,153 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) [2024-11-13 14:56:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2024-11-13 14:56:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:56:04,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:04,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:04,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 14:56:04,155 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)] === [2024-11-13 14:56:04,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1780861947, now seen corresponding path program 1 times [2024-11-13 14:56:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657653419] [2024-11-13 14:56:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:04,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:04,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657653419] [2024-11-13 14:56:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657653419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:04,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:04,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:56:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566656897] [2024-11-13 14:56:04,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:04,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:56:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:56:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:04,612 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) 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) [2024-11-13 14:56:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:05,252 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2024-11-13 14:56:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:56:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 [2024-11-13 14:56:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:05,253 INFO L225 Difference]: With dead ends: 203 [2024-11-13 14:56:05,254 INFO L226 Difference]: Without dead ends: 203 [2024-11-13 14:56:05,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:05,254 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 55 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:05,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 461 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:56:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-13 14:56:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2024-11-13 14:56:05,262 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) [2024-11-13 14:56:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2024-11-13 14:56:05,266 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 19 [2024-11-13 14:56:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:05,267 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2024-11-13 14:56:05,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2024-11-13 14:56:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2024-11-13 14:56:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 14:56:05,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:05,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:56:05,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:56:05,268 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)] === [2024-11-13 14:56:05,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1780861948, now seen corresponding path program 1 times [2024-11-13 14:56:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:05,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280734624] [2024-11-13 14:56:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:05,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:05,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:56:05,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:05,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280734624] [2024-11-13 14:56:05,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280734624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:05,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:05,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:56:05,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984291032] [2024-11-13 14:56:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:05,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:56:05,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:56:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:05,988 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) [2024-11-13 14:56:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:06,444 INFO L93 Difference]: Finished difference Result 203 states and 225 transitions. [2024-11-13 14:56:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:56:06,445 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 [2024-11-13 14:56:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:06,447 INFO L225 Difference]: With dead ends: 203 [2024-11-13 14:56:06,447 INFO L226 Difference]: Without dead ends: 203 [2024-11-13 14:56:06,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:06,448 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 97 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:06,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 344 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:56:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-13 14:56:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2024-11-13 14:56:06,454 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) [2024-11-13 14:56:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2024-11-13 14:56:06,457 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 19 [2024-11-13 14:56:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:06,457 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2024-11-13 14:56:06,458 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) [2024-11-13 14:56:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2024-11-13 14:56:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 14:56:06,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:06,459 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] [2024-11-13 14:56:06,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 14:56:06,459 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)] === [2024-11-13 14:56:06,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -496847406, now seen corresponding path program 1 times [2024-11-13 14:56:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301637658] [2024-11-13 14:56:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:06,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:07,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:56:07,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:07,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301637658] [2024-11-13 14:56:07,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301637658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:56:07,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359024790] [2024-11-13 14:56:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:07,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:56:07,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:56:07,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:56:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:07,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 14:56:07,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:56:07,583 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-13 14:56:07,585 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 14 treesize of output 19 [2024-11-13 14:56:07,634 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| 1))) is different from true [2024-11-13 14:56:07,715 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-13 14:56:07,716 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 [2024-11-13 14:56:07,960 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 [2024-11-13 14:56:08,042 INFO L349 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2024-11-13 14:56:08,043 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 22 treesize of output 43 [2024-11-13 14:56:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-13 14:56:08,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:56:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:56:09,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359024790] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:56:09,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:56:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2024-11-13 14:56:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838840379] [2024-11-13 14:56:09,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:56:09,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 14:56:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 14:56:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=329, Unknown=2, NotChecked=78, Total=506 [2024-11-13 14:56:09,234 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 23 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 14:56:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:10,956 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2024-11-13 14:56:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:56:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-11-13 14:56:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:10,958 INFO L225 Difference]: With dead ends: 201 [2024-11-13 14:56:10,958 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 14:56:10,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=508, Unknown=2, NotChecked=98, Total=756 [2024-11-13 14:56:10,959 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 254 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:10,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1015 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1241 Invalid, 0 Unknown, 429 Unchecked, 1.4s Time] [2024-11-13 14:56:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 14:56:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-11-13 14:56:10,965 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) [2024-11-13 14:56:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-13 14:56:10,966 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 37 [2024-11-13 14:56:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:10,966 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-13 14:56:10,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.238095238095238) internal successors, (89), 21 states have internal predecessors, (89), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 14:56:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-13 14:56:10,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 14:56:10,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:10,967 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] [2024-11-13 14:56:10,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:56:11,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:11,173 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)] === [2024-11-13 14:56:11,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash -496847405, now seen corresponding path program 1 times [2024-11-13 14:56:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:11,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619254249] [2024-11-13 14:56:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:11,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:11,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:12,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:56:12,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619254249] [2024-11-13 14:56:12,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619254249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:12,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:12,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 14:56:12,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132186540] [2024-11-13 14:56:12,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:12,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 14:56:12,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:12,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 14:56:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:12,125 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2024-11-13 14:56:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:12,594 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2024-11-13 14:56:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:56:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2024-11-13 14:56:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:12,596 INFO L225 Difference]: With dead ends: 200 [2024-11-13 14:56:12,596 INFO L226 Difference]: Without dead ends: 200 [2024-11-13 14:56:12,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-13 14:56:12,597 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 103 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:12,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 327 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 14:56:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-13 14:56:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2024-11-13 14:56:12,603 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) [2024-11-13 14:56:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2024-11-13 14:56:12,605 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 37 [2024-11-13 14:56:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:12,606 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2024-11-13 14:56:12,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2024-11-13 14:56:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2024-11-13 14:56:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 14:56:12,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:12,608 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] [2024-11-13 14:56:12,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:56:12,608 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:56:12,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1817184705, now seen corresponding path program 1 times [2024-11-13 14:56:12,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:12,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460469283] [2024-11-13 14:56:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:12,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:13,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:13,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:13,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:56:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460469283] [2024-11-13 14:56:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460469283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:13,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:13,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 14:56:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294519501] [2024-11-13 14:56:13,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:13,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:56:13,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:56:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:56:13,284 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:13,968 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2024-11-13 14:56:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:56:13,969 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), 1 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 [2024-11-13 14:56:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:13,970 INFO L225 Difference]: With dead ends: 205 [2024-11-13 14:56:13,970 INFO L226 Difference]: Without dead ends: 205 [2024-11-13 14:56:13,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:56:13,971 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 210 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:13,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 382 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 14:56:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-13 14:56:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2024-11-13 14:56:13,982 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) [2024-11-13 14:56:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2024-11-13 14:56:13,984 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 58 [2024-11-13 14:56:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:13,984 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2024-11-13 14:56:13,984 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2024-11-13 14:56:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 14:56:13,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:13,986 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] [2024-11-13 14:56:13,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:56:13,986 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:56:13,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1817184704, now seen corresponding path program 1 times [2024-11-13 14:56:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471024985] [2024-11-13 14:56:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:14,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:14,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:14,456 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:56:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471024985] [2024-11-13 14:56:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471024985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:14,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:14,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 14:56:14,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768388969] [2024-11-13 14:56:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:14,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:56:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:14,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:56:14,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:56:14,588 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:15,308 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2024-11-13 14:56:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:56:15,308 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), 1 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 [2024-11-13 14:56:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:15,310 INFO L225 Difference]: With dead ends: 204 [2024-11-13 14:56:15,310 INFO L226 Difference]: Without dead ends: 204 [2024-11-13 14:56:15,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:56:15,311 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 275 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:15,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 313 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 14:56:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-13 14:56:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 195. [2024-11-13 14:56:15,319 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) [2024-11-13 14:56:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 218 transitions. [2024-11-13 14:56:15,321 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 218 transitions. Word has length 58 [2024-11-13 14:56:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:15,321 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 218 transitions. [2024-11-13 14:56:15,322 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 218 transitions. [2024-11-13 14:56:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 14:56:15,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:15,323 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] [2024-11-13 14:56:15,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 14:56:15,324 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:56:15,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -498150782, now seen corresponding path program 1 times [2024-11-13 14:56:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:15,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982064983] [2024-11-13 14:56:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:15,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:15,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:15,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:15,959 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:56:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982064983] [2024-11-13 14:56:16,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982064983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:16,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:16,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 14:56:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314722084] [2024-11-13 14:56:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:16,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:56:16,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:56:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:56:16,034 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:16,966 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2024-11-13 14:56:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 14:56:16,967 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), 1 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 [2024-11-13 14:56:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:16,968 INFO L225 Difference]: With dead ends: 200 [2024-11-13 14:56:16,968 INFO L226 Difference]: Without dead ends: 200 [2024-11-13 14:56:16,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-13 14:56:16,969 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 148 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:16,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 451 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 14:56:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-13 14:56:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 188. [2024-11-13 14:56:16,975 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) [2024-11-13 14:56:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 211 transitions. [2024-11-13 14:56:16,977 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 211 transitions. Word has length 59 [2024-11-13 14:56:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:16,977 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 211 transitions. [2024-11-13 14:56:16,977 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), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 14:56:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 211 transitions. [2024-11-13 14:56:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 14:56:16,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:16,978 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] [2024-11-13 14:56:16,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 14:56:16,979 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:56:16,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash -498150781, now seen corresponding path program 1 times [2024-11-13 14:56:16,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:16,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933850878] [2024-11-13 14:56:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:17,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:17,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:17,590 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:56:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:17,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:17,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933850878] [2024-11-13 14:56:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933850878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:56:17,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:56:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 14:56:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7764798] [2024-11-13 14:56:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:56:17,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 14:56:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 14:56:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-13 14:56:17,660 INFO L87 Difference]: Start difference. First operand 188 states and 211 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:56:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:56:18,245 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2024-11-13 14:56:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:56:18,245 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), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 59 [2024-11-13 14:56:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:56:18,247 INFO L225 Difference]: With dead ends: 183 [2024-11-13 14:56:18,247 INFO L226 Difference]: Without dead ends: 183 [2024-11-13 14:56:18,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:56:18,248 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 336 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:56:18,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 223 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 14:56:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-13 14:56:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2024-11-13 14:56:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 124 states have (on average 1.4193548387096775) internal successors, (176), 166 states have internal predecessors, (176), 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) [2024-11-13 14:56:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 204 transitions. [2024-11-13 14:56:18,254 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 204 transitions. Word has length 59 [2024-11-13 14:56:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:56:18,254 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 204 transitions. [2024-11-13 14:56:18,255 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), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 14:56:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 204 transitions. [2024-11-13 14:56:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:56:18,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:56:18,256 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] [2024-11-13 14:56:18,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 14:56:18,256 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:56:18,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:56:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2135756851, now seen corresponding path program 1 times [2024-11-13 14:56:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:56:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660580632] [2024-11-13 14:56:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:56:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:18,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:56:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:18,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:56:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:18,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:56:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:56:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660580632] [2024-11-13 14:56:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660580632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:56:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718548370] [2024-11-13 14:56:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:56:18,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:56:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:56:18,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:56:18,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:56:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:56:19,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-13 14:56:19,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:56:19,547 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 [2024-11-13 14:56:19,769 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:56:19,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:56:19,773 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 16 treesize of output 11 [2024-11-13 14:56:19,833 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 [2024-11-13 14:56:20,125 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:56:20,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:56:20,128 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 16 treesize of output 11 [2024-11-13 14:56:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:56:20,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:56:20,174 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 [2024-11-13 14:56:20,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-13 14:56:20,381 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 26 treesize of output 24 [2024-11-13 14:56:20,555 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 [2024-11-13 14:56:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:56:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718548370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:56:21,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:56:21,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 32 [2024-11-13 14:56:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614273404] [2024-11-13 14:56:21,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:56:21,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 14:56:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:56:21,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 14:56:21,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:56:21,136 INFO L87 Difference]: Start difference. First operand 181 states and 204 transitions. Second operand has 32 states, 32 states have (on average 3.40625) internal successors, (109), 30 states have internal predecessors, (109), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 14:56:25,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:29,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:33,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:37,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:41,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:45,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:49,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:53,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:56:57,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:01,865 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] [2024-11-13 14:57:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:57:03,668 INFO L93 Difference]: Finished difference Result 224 states and 249 transitions. [2024-11-13 14:57:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:57:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.40625) internal successors, (109), 30 states have internal predecessors, (109), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2024-11-13 14:57:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:57:03,670 INFO L225 Difference]: With dead ends: 224 [2024-11-13 14:57:03,671 INFO L226 Difference]: Without dead ends: 224 [2024-11-13 14:57:03,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 14:57:03,672 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 441 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 51 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:57:03,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 2009 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1859 Invalid, 10 Unknown, 0 Unchecked, 41.7s Time] [2024-11-13 14:57:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-13 14:57:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2024-11-13 14:57:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 148 states have (on average 1.3986486486486487) internal successors, (207), 190 states have internal predecessors, (207), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 14:57:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2024-11-13 14:57:03,685 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 66 [2024-11-13 14:57:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:57:03,686 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2024-11-13 14:57:03,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.40625) internal successors, (109), 30 states have internal predecessors, (109), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 14:57:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2024-11-13 14:57:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:57:03,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:57:03,689 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] [2024-11-13 14:57:03,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:57:03,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:03,894 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:57:03,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:57:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2126110497, now seen corresponding path program 1 times [2024-11-13 14:57:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:57:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998332060] [2024-11-13 14:57:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:57:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:04,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:57:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:04,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:57:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:04,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:57:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:57:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:57:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998332060] [2024-11-13 14:57:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998332060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:57:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159575385] [2024-11-13 14:57:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:05,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:57:05,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:57:05,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:57:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:05,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 14:57:05,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:57:05,955 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 [2024-11-13 14:57:06,067 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 14:57:06,067 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 [2024-11-13 14:57:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:06,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:06,221 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 25 treesize of output 16 [2024-11-13 14:57:06,283 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 [2024-11-13 14:57:06,373 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 [2024-11-13 14:57:06,508 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 [2024-11-13 14:57:06,546 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 14:57:06,547 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 16 treesize of output 18 [2024-11-13 14:57:06,672 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 [2024-11-13 14:57:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:06,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:06,784 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 [2024-11-13 14:57:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2024-11-13 14:57:06,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:57:07,262 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 [2024-11-13 14:57:07,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:57:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:57:07,536 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 [2024-11-13 14:57:07,543 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 48 treesize of output 44 [2024-11-13 14:57:07,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:07,554 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 40 treesize of output 44 [2024-11-13 14:57:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159575385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:57:07,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:57:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 37 [2024-11-13 14:57:07,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541739704] [2024-11-13 14:57:07,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:57:07,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 14:57:07,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:57:07,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 14:57:07,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1743, Unknown=1, NotChecked=84, Total=1980 [2024-11-13 14:57:07,721 INFO L87 Difference]: Start difference. First operand 207 states and 235 transitions. Second operand has 38 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 14:57:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:57:10,395 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2024-11-13 14:57:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 14:57:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2024-11-13 14:57:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:57:10,397 INFO L225 Difference]: With dead ends: 213 [2024-11-13 14:57:10,397 INFO L226 Difference]: Without dead ends: 213 [2024-11-13 14:57:10,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=333, Invalid=3092, Unknown=1, NotChecked=114, Total=3540 [2024-11-13 14:57:10,400 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 344 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:57:10,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1614 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2636 Invalid, 0 Unknown, 220 Unchecked, 1.9s Time] [2024-11-13 14:57:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-13 14:57:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2024-11-13 14:57:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 148 states have (on average 1.3918918918918919) internal successors, (206), 190 states have internal predecessors, (206), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 14:57:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 234 transitions. [2024-11-13 14:57:10,408 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 234 transitions. Word has length 66 [2024-11-13 14:57:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:57:10,408 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 234 transitions. [2024-11-13 14:57:10,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 35 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 14:57:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 234 transitions. [2024-11-13 14:57:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 14:57:10,409 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:57:10,409 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] [2024-11-13 14:57:10,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:57:10,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 14:57:10,613 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:57:10,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:57:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2126110498, now seen corresponding path program 1 times [2024-11-13 14:57:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:57:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870318904] [2024-11-13 14:57:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:57:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:11,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:57:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:11,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:57:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:11,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:57:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:57:11,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:57:11,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870318904] [2024-11-13 14:57:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870318904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:57:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484563191] [2024-11-13 14:57:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:11,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:57:11,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:57:11,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:57:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:12,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 14:57:12,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:57:12,437 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 [2024-11-13 14:57:12,747 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 [2024-11-13 14:57:12,757 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 [2024-11-13 14:57:13,024 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:13,025 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 [2024-11-13 14:57:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:13,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:13,034 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 [2024-11-13 14:57:13,091 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 [2024-11-13 14:57:13,100 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 [2024-11-13 14:57:13,207 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 [2024-11-13 14:57:13,214 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 [2024-11-13 14:57:13,287 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_13| Int)) (= 0 (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_13|) 0)))) is different from true [2024-11-13 14:57:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:57:13,423 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 [2024-11-13 14:57:13,440 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 14:57:13,440 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 [2024-11-13 14:57:13,681 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:13,682 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 [2024-11-13 14:57:13,692 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:13,693 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:13,703 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-11-13 14:57:13,704 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 [2024-11-13 14:57:13,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2024-11-13 14:57:13,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:57:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484563191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:57:14,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:57:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2024-11-13 14:57:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017654285] [2024-11-13 14:57:14,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:57:14,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 14:57:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:57:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 14:57:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1303, Unknown=1, NotChecked=72, Total=1482 [2024-11-13 14:57:14,248 INFO L87 Difference]: Start difference. First operand 207 states and 234 transitions. Second operand has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 14:57:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:57:18,600 INFO L93 Difference]: Finished difference Result 370 states and 415 transitions. [2024-11-13 14:57:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:57:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 66 [2024-11-13 14:57:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:57:18,603 INFO L225 Difference]: With dead ends: 370 [2024-11-13 14:57:18,603 INFO L226 Difference]: Without dead ends: 370 [2024-11-13 14:57:18,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=282, Invalid=3381, Unknown=1, NotChecked=118, Total=3782 [2024-11-13 14:57:18,605 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 506 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:57:18,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1474 Invalid, 3496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3026 Invalid, 0 Unknown, 374 Unchecked, 2.7s Time] [2024-11-13 14:57:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-13 14:57:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 306. [2024-11-13 14:57:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 237 states have (on average 1.4177215189873418) internal successors, (336), 281 states have internal predecessors, (336), 24 states have call successors, (24), 10 states have call predecessors, (24), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 14:57:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2024-11-13 14:57:18,618 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 66 [2024-11-13 14:57:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:57:18,618 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2024-11-13 14:57:18,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.242424242424242) internal successors, (107), 30 states have internal predecessors, (107), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 14:57:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2024-11-13 14:57:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 14:57:18,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:57:18,619 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] [2024-11-13 14:57:18,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:57:18,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:57:18,820 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:57:18,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:57:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1203023459, now seen corresponding path program 1 times [2024-11-13 14:57:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:57:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991572030] [2024-11-13 14:57:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:57:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:19,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:57:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:19,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:57:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:19,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:57:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:57:19,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:57:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991572030] [2024-11-13 14:57:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991572030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:57:19,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397455850] [2024-11-13 14:57:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:57:19,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:57:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:57:19,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:57:19,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:57:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:57:19,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 14:57:19,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:57:20,049 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 [2024-11-13 14:57:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:20,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:20,257 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 16 treesize of output 11 [2024-11-13 14:57:20,307 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 [2024-11-13 14:57:20,781 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:57:20,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:57:20,785 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 16 treesize of output 11 [2024-11-13 14:57:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 14:57:20,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:57:20,868 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 [2024-11-13 14:57:21,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-13 14:57:21,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-13 14:57:21,259 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 [2024-11-13 14:57:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:57:21,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397455850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:57:21,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:57:21,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 32 [2024-11-13 14:57:21,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030922056] [2024-11-13 14:57:21,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:57:21,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 14:57:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:57:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 14:57:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-11-13 14:57:21,615 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand has 32 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 30 states have internal predecessors, (107), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 14:57:25,686 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] [2024-11-13 14:57:29,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:37,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:41,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:46,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:50,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:54,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:57:58,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 14:58:02,587 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] [2024-11-13 14:58:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:04,101 INFO L93 Difference]: Finished difference Result 333 states and 398 transitions. [2024-11-13 14:58:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 14:58:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 30 states have internal predecessors, (107), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 68 [2024-11-13 14:58:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:04,104 INFO L225 Difference]: With dead ends: 333 [2024-11-13 14:58:04,104 INFO L226 Difference]: Without dead ends: 333 [2024-11-13 14:58:04,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 14:58:04,105 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 280 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 35 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:04,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2407 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2239 Invalid, 10 Unknown, 0 Unchecked, 41.7s Time] [2024-11-13 14:58:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-13 14:58:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 318. [2024-11-13 14:58:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 248 states have (on average 1.3911290322580645) internal successors, (345), 292 states have internal predecessors, (345), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 14:58:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 385 transitions. [2024-11-13 14:58:04,117 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 385 transitions. Word has length 68 [2024-11-13 14:58:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:04,117 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 385 transitions. [2024-11-13 14:58:04,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 30 states have internal predecessors, (107), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 14:58:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 385 transitions. [2024-11-13 14:58:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 14:58:04,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:04,118 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, 1, 1, 1] [2024-11-13 14:58:04,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 14:58:04,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:04,323 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:58:04,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:04,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1870882854, now seen corresponding path program 1 times [2024-11-13 14:58:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:04,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687171] [2024-11-13 14:58:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:04,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:58:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:58:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:06,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:58:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:58:08,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687171] [2024-11-13 14:58:08,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:08,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593857083] [2024-11-13 14:58:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:08,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:08,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:08,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:58:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:08,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-13 14:58:08,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:08,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:58:08,749 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 [2024-11-13 14:58:09,203 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 11 [2024-11-13 14:58:09,210 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 11 [2024-11-13 14:58:09,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 14:58:09,476 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:09,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:58:09,480 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 19 treesize of output 14 [2024-11-13 14:58:10,150 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 11 [2024-11-13 14:58:10,162 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 11 [2024-11-13 14:58:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:10,755 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:10,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 22 [2024-11-13 14:58:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:10,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-13 14:58:11,363 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 43 treesize of output 27 [2024-11-13 14:58:11,369 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 15 treesize of output 7 [2024-11-13 14:58:11,585 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 [2024-11-13 14:58:11,592 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 [2024-11-13 14:58:11,865 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 15 treesize of output 7 [2024-11-13 14:58:11,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 14:58:11,877 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 [2024-11-13 14:58:12,828 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_16| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_16|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_9|) 0) 0))) is different from true [2024-11-13 14:58:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:58:12,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 14:58:12,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:58:12,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 14:58:12,947 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 14:58:12,947 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 [2024-11-13 14:58:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,434 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 34 treesize of output 22 [2024-11-13 14:58:13,459 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,460 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,479 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 14:58:13,479 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 21 [2024-11-13 14:58:13,646 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 14:58:13,651 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:58:13,663 INFO L349 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2024-11-13 14:58:13,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 16 [2024-11-13 14:58:13,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 14:58:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2024-11-13 14:58:14,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:58:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593857083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:15,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:58:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34] total 60 [2024-11-13 14:58:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475625005] [2024-11-13 14:58:15,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:58:15,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 14:58:15,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 14:58:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3979, Unknown=1, NotChecked=126, Total=4290 [2024-11-13 14:58:15,537 INFO L87 Difference]: Start difference. First operand 318 states and 385 transitions. Second operand has 60 states, 57 states have (on average 2.175438596491228) internal successors, (124), 55 states have internal predecessors, (124), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 14:58:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:54,678 INFO L93 Difference]: Finished difference Result 492 states and 577 transitions. [2024-11-13 14:58:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-13 14:58:54,679 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 2.175438596491228) internal successors, (124), 55 states have internal predecessors, (124), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 71 [2024-11-13 14:58:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:54,683 INFO L225 Difference]: With dead ends: 492 [2024-11-13 14:58:54,683 INFO L226 Difference]: Without dead ends: 492 [2024-11-13 14:58:54,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2785 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=723, Invalid=12388, Unknown=3, NotChecked=226, Total=13340 [2024-11-13 14:58:54,687 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 380 mSDsluCounter, 3526 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 5712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:54,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 3631 Invalid, 5712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [77 Valid, 5243 Invalid, 0 Unknown, 392 Unchecked, 14.7s Time] [2024-11-13 14:58:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-13 14:58:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 370. [2024-11-13 14:58:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 292 states have (on average 1.3390410958904109) internal successors, (391), 339 states have internal predecessors, (391), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:58:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 441 transitions. [2024-11-13 14:58:54,705 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 441 transitions. Word has length 71 [2024-11-13 14:58:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:54,705 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 441 transitions. [2024-11-13 14:58:54,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 2.175438596491228) internal successors, (124), 55 states have internal predecessors, (124), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 14:58:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 441 transitions. [2024-11-13 14:58:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:58:54,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:54,707 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, 1, 1, 1, 1, 1] [2024-11-13 14:58:54,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 14:58:54,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:54,908 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:58:54,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1642229733, now seen corresponding path program 1 times [2024-11-13 14:58:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:54,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357513761] [2024-11-13 14:58:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:54,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:58:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,188 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:58:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:58:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:58:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 14:58:55,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:55,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357513761] [2024-11-13 14:58:55,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357513761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:58:55,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:58:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 14:58:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376021536] [2024-11-13 14:58:55,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:58:55,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:58:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:58:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:58:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 14:58:55,314 INFO L87 Difference]: Start difference. First operand 370 states and 441 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:58:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:58:57,073 INFO L93 Difference]: Finished difference Result 369 states and 439 transitions. [2024-11-13 14:58:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:58:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2024-11-13 14:58:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:58:57,075 INFO L225 Difference]: With dead ends: 369 [2024-11-13 14:58:57,076 INFO L226 Difference]: Without dead ends: 369 [2024-11-13 14:58:57,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:58:57,077 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 127 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 14:58:57,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 539 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 14:58:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-11-13 14:58:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2024-11-13 14:58:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 292 states have (on average 1.332191780821918) internal successors, (389), 338 states have internal predecessors, (389), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:58:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 439 transitions. [2024-11-13 14:58:57,092 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 439 transitions. Word has length 73 [2024-11-13 14:58:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:58:57,092 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 439 transitions. [2024-11-13 14:58:57,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 14:58:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 439 transitions. [2024-11-13 14:58:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:58:57,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:58:57,094 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, 1, 1, 1, 1, 1] [2024-11-13 14:58:57,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 14:58:57,094 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:58:57,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:58:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1642229734, now seen corresponding path program 1 times [2024-11-13 14:58:57,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:58:57,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913783302] [2024-11-13 14:58:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:57,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:58:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:58:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:58:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:58:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:58:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:58:58,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:58:58,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913783302] [2024-11-13 14:58:58,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913783302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:58:58,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686474743] [2024-11-13 14:58:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:58:58,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:58:58,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:58:58,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:58:58,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:58:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:58:59,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-13 14:58:59,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:58:59,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 14:59:00,041 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 [2024-11-13 14:59:00,052 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 [2024-11-13 14:59:00,636 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 11 [2024-11-13 14:59:00,647 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 [2024-11-13 14:59:00,941 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 18 [2024-11-13 14:59:00,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 14:59:00,965 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 [2024-11-13 14:59:00,973 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 [2024-11-13 14:59:01,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 14:59:01,626 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 18 [2024-11-13 14:59:01,665 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 14:59:01,665 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 [2024-11-13 14:59:01,677 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 [2024-11-13 14:59:03,306 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:03,308 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:03,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:59:03,325 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 22 [2024-11-13 14:59:03,344 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:03,346 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:03,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:59:03,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 40 [2024-11-13 14:59:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:59:03,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686474743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:05,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:59:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 33 [2024-11-13 14:59:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074646935] [2024-11-13 14:59:05,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:05,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 14:59:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 14:59:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 14:59:05,313 INFO L87 Difference]: Start difference. First operand 369 states and 439 transitions. Second operand has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 31 states have internal predecessors, (119), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 14:59:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:18,583 INFO L93 Difference]: Finished difference Result 400 states and 469 transitions. [2024-11-13 14:59:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 14:59:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 31 states have internal predecessors, (119), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2024-11-13 14:59:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:18,586 INFO L225 Difference]: With dead ends: 400 [2024-11-13 14:59:18,586 INFO L226 Difference]: Without dead ends: 400 [2024-11-13 14:59:18,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=450, Invalid=4952, Unknown=0, NotChecked=0, Total=5402 [2024-11-13 14:59:18,590 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 450 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:18,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1525 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3065 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2024-11-13 14:59:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-13 14:59:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 368. [2024-11-13 14:59:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 292 states have (on average 1.3253424657534247) internal successors, (387), 337 states have internal predecessors, (387), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:59:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 437 transitions. [2024-11-13 14:59:18,603 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 437 transitions. Word has length 73 [2024-11-13 14:59:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:18,603 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 437 transitions. [2024-11-13 14:59:18,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 31 states have internal predecessors, (119), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 14:59:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 437 transitions. [2024-11-13 14:59:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 14:59:18,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:18,605 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:18,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 14:59:18,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 14:59:18,806 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:59:18,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:18,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1641816534, now seen corresponding path program 1 times [2024-11-13 14:59:18,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:18,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115818330] [2024-11-13 14:59:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:19,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:59:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:19,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:59:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:19,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:59:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:19,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 14:59:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 14:59:19,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:19,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115818330] [2024-11-13 14:59:19,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115818330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:19,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852591226] [2024-11-13 14:59:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:19,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:19,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:19,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:19,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:59:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:20,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 14:59:20,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:20,331 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-13 14:59:20,331 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 11 [2024-11-13 14:59:20,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 14:59:20,380 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 10 treesize of output 8 [2024-11-13 14:59:20,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2024-11-13 14:59:20,541 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:20,542 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 [2024-11-13 14:59:21,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:21,041 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:21,041 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 [2024-11-13 14:59:21,436 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:21,437 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 [2024-11-13 14:59:21,443 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 [2024-11-13 14:59:21,525 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|) (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= (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 [2024-11-13 14:59:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:21,746 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:21,746 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 [2024-11-13 14:59:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:21,769 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 [2024-11-13 14:59:22,016 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 [2024-11-13 14:59:22,030 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:22,030 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 [2024-11-13 14:59:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:22,271 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:22,271 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 [2024-11-13 14:59:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:22,295 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 [2024-11-13 14:59:22,381 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:22,381 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 [2024-11-13 14:59:22,397 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 [2024-11-13 14:59:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:22,536 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 14:59:22,536 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 [2024-11-13 14:59:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 55 not checked. [2024-11-13 14:59:22,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:27,145 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_sll_~#list~0#1.offset| 4))) (and (or (< 0 (+ |c_ULTIMATE.start_main_~#p1~0#1.offset| 1)) (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_95| Int) (v_ArrVal_3469 Int)) (or (< (select (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_95| v_ArrVal_3469) |c_ULTIMATE.start_create_sll_~#list~0#1.base|) .cse0) (< |c_#StackHeapBarrier| (+ |v_chain_node_alloc_node_~ptr~0#1.base_95| 1))))) (forall ((|v_chain_node_alloc_node_~ptr~0#1.base_95| Int)) (or (forall ((v_ArrVal_3469 Int)) (let ((.cse1 (store |c_#length| |v_chain_node_alloc_node_~ptr~0#1.base_95| v_ArrVal_3469))) (or (< (select .cse1 |c_ULTIMATE.start_create_sll_~#list~0#1.base|) .cse0) (< (+ |c_ULTIMATE.start_main_~#p1~0#1.offset| 3) (select .cse1 |c_ULTIMATE.start_main_~#p1~0#1.base|))))) (< |c_#StackHeapBarrier| (+ |v_chain_node_alloc_node_~ptr~0#1.base_95| 1)))))) is different from false [2024-11-13 14:59:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852591226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:27,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:59:27,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2024-11-13 14:59:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989635437] [2024-11-13 14:59:27,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:27,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 14:59:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 14:59:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=341, Unknown=3, NotChecked=120, Total=552 [2024-11-13 14:59:27,151 INFO L87 Difference]: Start difference. First operand 368 states and 437 transitions. Second operand has 21 states, 20 states have (on average 5.35) internal successors, (107), 18 states have internal predecessors, (107), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 14:59:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:30,230 INFO L93 Difference]: Finished difference Result 368 states and 438 transitions. [2024-11-13 14:59:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:59:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 18 states have internal predecessors, (107), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 73 [2024-11-13 14:59:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:30,232 INFO L225 Difference]: With dead ends: 368 [2024-11-13 14:59:30,232 INFO L226 Difference]: Without dead ends: 368 [2024-11-13 14:59:30,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=177, Invalid=702, Unknown=3, NotChecked=174, Total=1056 [2024-11-13 14:59:30,233 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 377 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:30,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 418 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 941 Invalid, 0 Unknown, 368 Unchecked, 2.3s Time] [2024-11-13 14:59:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-13 14:59:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 367. [2024-11-13 14:59:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 292 states have (on average 1.321917808219178) internal successors, (386), 336 states have internal predecessors, (386), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:59:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 436 transitions. [2024-11-13 14:59:30,246 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 436 transitions. Word has length 73 [2024-11-13 14:59:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:30,247 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 436 transitions. [2024-11-13 14:59:30,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.35) internal successors, (107), 18 states have internal predecessors, (107), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 14:59:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 436 transitions. [2024-11-13 14:59:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 14:59:30,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:30,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:30,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 14:59:30,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 14:59:30,450 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:59:30,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash -903830836, now seen corresponding path program 1 times [2024-11-13 14:59:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:30,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816443999] [2024-11-13 14:59:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:31,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:59:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:31,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:59:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:32,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:59:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:32,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:59:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 14:59:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816443999] [2024-11-13 14:59:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816443999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631993215] [2024-11-13 14:59:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:32,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:32,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:32,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:32,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:59:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:32,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 14:59:32,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:32,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-13 14:59:32,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-13 14:59:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:32,671 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 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-13 14:59:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:32,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 1 [2024-11-13 14:59:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:32,701 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 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-13 14:59:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:32,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 1 [2024-11-13 14:59:33,473 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 [2024-11-13 14:59:33,680 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 14:59:33,680 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 [2024-11-13 14:59:33,979 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:33,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:59:33,986 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 25 treesize of output 16 [2024-11-13 14:59:34,145 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 [2024-11-13 14:59:34,343 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 [2024-11-13 14:59:34,362 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 [2024-11-13 14:59:34,536 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-13 14:59:34,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-13 14:59:34,742 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 [2024-11-13 14:59:34,755 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base| 1))) is different from true [2024-11-13 14:59:34,837 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 14:59:34,838 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 16 treesize of output 18 [2024-11-13 14:59:35,078 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 [2024-11-13 14:59:35,952 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:35,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 14:59:35,958 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 [2024-11-13 14:59:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 33 not checked. [2024-11-13 14:59:35,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:36,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631993215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:36,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:59:36,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 31 [2024-11-13 14:59:36,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094546065] [2024-11-13 14:59:36,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:36,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 14:59:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 14:59:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=905, Unknown=2, NotChecked=122, Total=1122 [2024-11-13 14:59:36,906 INFO L87 Difference]: Start difference. First operand 367 states and 436 transitions. Second operand has 32 states, 28 states have (on average 4.464285714285714) internal successors, (125), 30 states have internal predecessors, (125), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 14:59:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 14:59:44,691 INFO L93 Difference]: Finished difference Result 379 states and 449 transitions. [2024-11-13 14:59:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 14:59:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 4.464285714285714) internal successors, (125), 30 states have internal predecessors, (125), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 77 [2024-11-13 14:59:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 14:59:44,694 INFO L225 Difference]: With dead ends: 379 [2024-11-13 14:59:44,694 INFO L226 Difference]: Without dead ends: 379 [2024-11-13 14:59:44,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=208, Invalid=1960, Unknown=2, NotChecked=182, Total=2352 [2024-11-13 14:59:44,696 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 363 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-13 14:59:44,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1223 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2504 Invalid, 0 Unknown, 388 Unchecked, 5.8s Time] [2024-11-13 14:59:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-11-13 14:59:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 366. [2024-11-13 14:59:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 292 states have (on average 1.3150684931506849) internal successors, (384), 335 states have internal predecessors, (384), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 14:59:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 434 transitions. [2024-11-13 14:59:44,717 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 434 transitions. Word has length 77 [2024-11-13 14:59:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 14:59:44,718 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 434 transitions. [2024-11-13 14:59:44,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 4.464285714285714) internal successors, (125), 30 states have internal predecessors, (125), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 14:59:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 434 transitions. [2024-11-13 14:59:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 14:59:44,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 14:59:44,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:59:44,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 14:59:44,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 14:59:44,920 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 14:59:44,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:59:44,921 INFO L85 PathProgramCache]: Analyzing trace with hash -903830835, now seen corresponding path program 1 times [2024-11-13 14:59:44,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:59:44,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471242480] [2024-11-13 14:59:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:44,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:59:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:46,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 14:59:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:46,728 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 14:59:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:46,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 14:59:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:47,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 14:59:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 14:59:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:59:47,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471242480] [2024-11-13 14:59:47,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471242480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:47,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939064387] [2024-11-13 14:59:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:59:47,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:59:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:59:47,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:59:47,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:59:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:59:47,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-13 14:59:47,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:59:48,096 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 [2024-11-13 14:59:48,956 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 [2024-11-13 14:59:49,170 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:49,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 14:59:49,785 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 11 [2024-11-13 14:59:49,794 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 [2024-11-13 14:59:50,123 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:50,123 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 30 treesize of output 18 [2024-11-13 14:59:50,131 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 [2024-11-13 14:59:50,138 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 [2024-11-13 14:59:51,522 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 18 [2024-11-13 14:59:51,564 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 14:59:51,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 14:59:51,605 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 14:59:51,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-13 14:59:52,148 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 14:59:52,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 14:59:52,160 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 14:59:52,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 14:59:52,792 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_18| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_18|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_17|) 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 [2024-11-13 14:59:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:52,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:59:52,918 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 14:59:52,918 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 23 treesize of output 21 [2024-11-13 14:59:52,971 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2024-11-13 14:59:52,971 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 20 treesize of output 22 [2024-11-13 14:59:55,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 14:59:55,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 14:59:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:55,736 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 [2024-11-13 14:59:55,744 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:55,745 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 14:59:55,771 INFO L349 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2024-11-13 14:59:55,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 16 [2024-11-13 14:59:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2024-11-13 14:59:55,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:59:56,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-13 14:59:56,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-13 14:59:56,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939064387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:59:56,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:59:56,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31] total 47 [2024-11-13 14:59:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052852124] [2024-11-13 14:59:56,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 14:59:56,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 14:59:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:59:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 14:59:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2276, Unknown=9, NotChecked=96, Total=2550 [2024-11-13 14:59:56,797 INFO L87 Difference]: Start difference. First operand 366 states and 434 transitions. Second operand has 48 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:00:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:13,004 INFO L93 Difference]: Finished difference Result 415 states and 499 transitions. [2024-11-13 15:00:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-13 15:00:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 77 [2024-11-13 15:00:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:13,006 INFO L225 Difference]: With dead ends: 415 [2024-11-13 15:00:13,006 INFO L226 Difference]: Without dead ends: 415 [2024-11-13 15:00:13,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=552, Invalid=5922, Unknown=10, NotChecked=158, Total=6642 [2024-11-13 15:00:13,009 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 484 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 96 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:13,009 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1530 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3481 Invalid, 40 Unknown, 227 Unchecked, 9.5s Time] [2024-11-13 15:00:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2024-11-13 15:00:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 364. [2024-11-13 15:00:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 292 states have (on average 1.3082191780821917) internal successors, (382), 333 states have internal predecessors, (382), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-13 15:00:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 430 transitions. [2024-11-13 15:00:13,026 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 430 transitions. Word has length 77 [2024-11-13 15:00:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:13,026 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 430 transitions. [2024-11-13 15:00:13,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 43 states have internal predecessors, (137), 7 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:00:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 430 transitions. [2024-11-13 15:00:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-13 15:00:13,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:13,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:13,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:00:13,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 15:00:13,232 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:00:13,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2049274622, now seen corresponding path program 1 times [2024-11-13 15:00:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283829252] [2024-11-13 15:00:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:14,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:00:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:15,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:00:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:16,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:00:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:18,450 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:00:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:00:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:18,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283829252] [2024-11-13 15:00:18,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283829252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:18,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934911739] [2024-11-13 15:00:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:18,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:18,461 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:18,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:00:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:18,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 15:00:18,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:19,474 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 [2024-11-13 15:00:19,491 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 [2024-11-13 15:00:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:20,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:00:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:20,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:00:20,500 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 [2024-11-13 15:00:20,508 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 [2024-11-13 15:00:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:21,172 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 15 treesize of output 7 [2024-11-13 15:00:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:21,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:00:21,190 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 39 treesize of output 26 [2024-11-13 15:00:21,397 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 [2024-11-13 15:00:21,405 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 [2024-11-13 15:00:21,703 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 [2024-11-13 15:00:21,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:00:21,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:00:22,823 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_28| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_28|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-13 15:00:22,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:22,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:00:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:00:22,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:00:22,940 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:00:22,940 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 [2024-11-13 15:00:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:25,265 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:25,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:00:25,285 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 40 [2024-11-13 15:00:25,316 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:25,318 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:25,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:00:25,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 40 [2024-11-13 15:00:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-13 15:00:25,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:27,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934911739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:27,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:00:27,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 53 [2024-11-13 15:00:27,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510658264] [2024-11-13 15:00:27,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:27,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 15:00:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 15:00:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3222, Unknown=1, NotChecked=114, Total=3540 [2024-11-13 15:00:27,553 INFO L87 Difference]: Start difference. First operand 364 states and 430 transitions. Second operand has 53 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 50 states have internal predecessors, (132), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:00:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:00:52,040 INFO L93 Difference]: Finished difference Result 569 states and 669 transitions. [2024-11-13 15:00:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 15:00:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 50 states have internal predecessors, (132), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 78 [2024-11-13 15:00:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:00:52,043 INFO L225 Difference]: With dead ends: 569 [2024-11-13 15:00:52,043 INFO L226 Difference]: Without dead ends: 569 [2024-11-13 15:00:52,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=602, Invalid=8331, Unknown=1, NotChecked=186, Total=9120 [2024-11-13 15:00:52,045 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 404 mSDsluCounter, 2921 mSDsCounter, 0 mSdLazyCounter, 4190 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 4710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:00:52,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 3023 Invalid, 4710 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [94 Valid, 4190 Invalid, 0 Unknown, 426 Unchecked, 14.1s Time] [2024-11-13 15:00:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-11-13 15:00:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 364. [2024-11-13 15:00:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 292 states have (on average 1.3047945205479452) internal successors, (381), 333 states have internal predecessors, (381), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-13 15:00:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 429 transitions. [2024-11-13 15:00:52,058 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 429 transitions. Word has length 78 [2024-11-13 15:00:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:00:52,058 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 429 transitions. [2024-11-13 15:00:52,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.5384615384615383) internal successors, (132), 50 states have internal predecessors, (132), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:00:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 429 transitions. [2024-11-13 15:00:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:00:52,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:00:52,060 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:00:52,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:00:52,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 15:00:52,261 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:00:52,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:00:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1394328308, now seen corresponding path program 1 times [2024-11-13 15:00:52,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:00:52,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397826640] [2024-11-13 15:00:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:00:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:53,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:00:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:53,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:00:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:53,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:00:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:54,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 15:00:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:00:54,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:00:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397826640] [2024-11-13 15:00:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397826640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:54,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104759606] [2024-11-13 15:00:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:00:54,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:00:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:00:54,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:00:54,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:00:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:00:54,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-13 15:00:54,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:00:54,896 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 [2024-11-13 15:00:55,622 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 [2024-11-13 15:00:55,630 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 [2024-11-13 15:00:56,164 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:56,165 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 [2024-11-13 15:00:56,185 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:56,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:00:56,191 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 [2024-11-13 15:00:56,353 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 [2024-11-13 15:00:56,361 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 [2024-11-13 15:00:56,602 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 [2024-11-13 15:00:56,608 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 [2024-11-13 15:00:57,166 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| (select |c_#valid| |chain_node_~node~0#1.base|))) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_33| Int)) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_33|) 0) 0))) is different from true [2024-11-13 15:00:57,381 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-13 15:00:57,382 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 [2024-11-13 15:00:57,391 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 [2024-11-13 15:00:57,625 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 [2024-11-13 15:00:57,631 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 [2024-11-13 15:00:57,769 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (= (select |c_old(#valid)| |chain_node_alloc_node_~ptr~0#1.base|) 0) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| (select |c_#length| |chain_node_alloc_node_~ptr~0#1.base|)) |c_#length|))) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_33| Int)) (= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_33|) 0) 0))) is different from true [2024-11-13 15:00:57,952 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:00:57,952 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 [2024-11-13 15:00:57,961 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 [2024-11-13 15:00:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:58,362 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 15:00:58,363 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2024-11-13 15:00:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:00:58,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:00:58,381 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 [2024-11-13 15:00:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 28 not checked. [2024-11-13 15:00:58,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:00:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104759606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:00:59,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:00:59,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2024-11-13 15:00:59,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410425116] [2024-11-13 15:00:59,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:00:59,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 15:00:59,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:00:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 15:00:59,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1606, Unknown=2, NotChecked=162, Total=1892 [2024-11-13 15:00:59,917 INFO L87 Difference]: Start difference. First operand 364 states and 429 transitions. Second operand has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 35 states have internal predecessors, (132), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 15:01:12,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:01:12,065 INFO L93 Difference]: Finished difference Result 403 states and 468 transitions. [2024-11-13 15:01:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:01:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 35 states have internal predecessors, (132), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 81 [2024-11-13 15:01:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:01:12,068 INFO L225 Difference]: With dead ends: 403 [2024-11-13 15:01:12,068 INFO L226 Difference]: Without dead ends: 403 [2024-11-13 15:01:12,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=320, Invalid=3846, Unknown=2, NotChecked=254, Total=4422 [2024-11-13 15:01:12,069 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 453 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3340 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 3907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:01:12,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1602 Invalid, 3907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3340 Invalid, 0 Unknown, 497 Unchecked, 8.1s Time] [2024-11-13 15:01:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-13 15:01:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 312. [2024-11-13 15:01:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 245 states have (on average 1.2653061224489797) internal successors, (310), 285 states have internal predecessors, (310), 24 states have call successors, (24), 13 states have call predecessors, (24), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 15:01:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 350 transitions. [2024-11-13 15:01:12,080 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 350 transitions. Word has length 81 [2024-11-13 15:01:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:01:12,081 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 350 transitions. [2024-11-13 15:01:12,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.473684210526316) internal successors, (132), 35 states have internal predecessors, (132), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-13 15:01:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 350 transitions. [2024-11-13 15:01:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:01:12,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:01:12,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:01:12,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:01:12,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 15:01:12,284 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:01:12,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:01:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1717364299, now seen corresponding path program 1 times [2024-11-13 15:01:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:01:12,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263135137] [2024-11-13 15:01:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:01:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:15,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:01:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:16,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:01:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:19,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:01:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:21,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:01:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:01:21,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:01:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263135137] [2024-11-13 15:01:21,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263135137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627356715] [2024-11-13 15:01:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:01:21,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:01:21,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:01:21,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:01:21,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:01:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:01:22,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-13 15:01:22,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:01:22,723 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 [2024-11-13 15:01:22,739 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 [2024-11-13 15:01:23,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:01:23,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:01:23,841 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 [2024-11-13 15:01:23,866 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 [2024-11-13 15:01:24,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:01:24,737 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 11 [2024-11-13 15:01:24,745 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 [2024-11-13 15:01:25,119 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 43 treesize of output 27 [2024-11-13 15:01:25,130 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 [2024-11-13 15:01:25,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:01:25,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:01:27,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 27 [2024-11-13 15:01:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:01:27,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-13 15:01:27,575 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-13 15:01:27,575 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 29 treesize of output 37 [2024-11-13 15:01:27,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-13 15:01:28,117 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 29 treesize of output 17 [2024-11-13 15:01:28,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:01:28,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:01:28,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:01:30,522 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_23|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_22| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_22|) 0) 0))) is different from true [2024-11-13 15:01:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:01:30,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:01:30,682 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-13 15:01:30,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-13 15:01:30,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:01:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:01:33,221 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 30 treesize of output 18 [2024-11-13 15:01:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:01:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:01:33,268 INFO L349 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2024-11-13 15:01:33,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 16 [2024-11-13 15:01:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2024-11-13 15:01:33,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:01:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627356715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:01:34,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:01:34,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 64 [2024-11-13 15:01:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174604625] [2024-11-13 15:01:34,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:01:34,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 15:01:34,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:01:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 15:01:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4037, Unknown=1, NotChecked=128, Total=4422 [2024-11-13 15:01:34,467 INFO L87 Difference]: Start difference. First operand 312 states and 350 transitions. Second operand has 64 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:02:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:07,747 INFO L93 Difference]: Finished difference Result 450 states and 508 transitions. [2024-11-13 15:02:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-13 15:02:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 82 [2024-11-13 15:02:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:07,749 INFO L225 Difference]: With dead ends: 450 [2024-11-13 15:02:07,749 INFO L226 Difference]: Without dead ends: 450 [2024-11-13 15:02:07,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=850, Invalid=11143, Unknown=1, NotChecked=216, Total=12210 [2024-11-13 15:02:07,752 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 509 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 2338 SdHoareTripleChecker+Invalid, 4482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:07,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 2338 Invalid, 4482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4011 Invalid, 0 Unknown, 342 Unchecked, 13.5s Time] [2024-11-13 15:02:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2024-11-13 15:02:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 311. [2024-11-13 15:02:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 245 states have (on average 1.2612244897959184) internal successors, (309), 284 states have internal predecessors, (309), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-13 15:02:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 348 transitions. [2024-11-13 15:02:07,763 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 348 transitions. Word has length 82 [2024-11-13 15:02:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:07,763 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 348 transitions. [2024-11-13 15:02:07,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:02:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 348 transitions. [2024-11-13 15:02:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:02:07,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:07,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:07,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:02:07,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 15:02:07,966 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:02:07,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1330159756, now seen corresponding path program 1 times [2024-11-13 15:02:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:07,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435993025] [2024-11-13 15:02:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:08,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:02:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:08,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:02:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:08,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:02:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:09,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:02:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 15:02:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:09,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435993025] [2024-11-13 15:02:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435993025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:02:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:02:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 15:02:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873498757] [2024-11-13 15:02:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:02:09,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:02:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:02:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:02:09,054 INFO L87 Difference]: Start difference. First operand 311 states and 348 transitions. Second operand has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:02:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:12,598 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2024-11-13 15:02:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:02:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2024-11-13 15:02:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:12,600 INFO L225 Difference]: With dead ends: 388 [2024-11-13 15:02:12,600 INFO L226 Difference]: Without dead ends: 388 [2024-11-13 15:02:12,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:02:12,601 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:12,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 632 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-13 15:02:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2024-11-13 15:02:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 363. [2024-11-13 15:02:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 293 states have (on average 1.2901023890784984) internal successors, (378), 331 states have internal predecessors, (378), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 15:02:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 427 transitions. [2024-11-13 15:02:12,612 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 427 transitions. Word has length 81 [2024-11-13 15:02:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:12,612 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 427 transitions. [2024-11-13 15:02:12,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:02:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 427 transitions. [2024-11-13 15:02:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 15:02:12,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:12,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:12,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 15:02:12,614 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:02:12,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1330159755, now seen corresponding path program 1 times [2024-11-13 15:02:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:12,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896539191] [2024-11-13 15:02:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:13,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:02:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:13,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:02:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:13,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:02:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:13,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:02:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 15:02:13,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896539191] [2024-11-13 15:02:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896539191] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:02:13,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:02:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:02:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025494614] [2024-11-13 15:02:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:02:13,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:02:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:02:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:02:13,715 INFO L87 Difference]: Start difference. First operand 363 states and 427 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:02:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:17,103 INFO L93 Difference]: Finished difference Result 389 states and 459 transitions. [2024-11-13 15:02:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:02:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2024-11-13 15:02:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:17,105 INFO L225 Difference]: With dead ends: 389 [2024-11-13 15:02:17,105 INFO L226 Difference]: Without dead ends: 389 [2024-11-13 15:02:17,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:02:17,106 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 149 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:17,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 596 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 15:02:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-13 15:02:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 368. [2024-11-13 15:02:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 298 states have (on average 1.2885906040268456) internal successors, (384), 336 states have internal predecessors, (384), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 15:02:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 433 transitions. [2024-11-13 15:02:17,116 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 433 transitions. Word has length 81 [2024-11-13 15:02:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:17,117 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 433 transitions. [2024-11-13 15:02:17,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:02:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 433 transitions. [2024-11-13 15:02:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:02:17,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:17,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:17,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-13 15:02:17,119 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:02:17,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1420737912, now seen corresponding path program 1 times [2024-11-13 15:02:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751236760] [2024-11-13 15:02:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:18,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:02:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:18,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:02:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:19,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:02:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:19,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:02:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:02:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751236760] [2024-11-13 15:02:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751236760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422818611] [2024-11-13 15:02:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:20,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:02:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:02:20,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:02:20,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:02:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:20,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-13 15:02:20,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:02:21,006 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 [2024-11-13 15:02:21,889 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 [2024-11-13 15:02:21,898 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 [2024-11-13 15:02:22,617 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 11 [2024-11-13 15:02:22,911 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 18 [2024-11-13 15:02:22,921 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 [2024-11-13 15:02:22,927 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 [2024-11-13 15:02:24,177 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 11 [2024-11-13 15:02:24,194 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 11 [2024-11-13 15:02:24,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 29 [2024-11-13 15:02:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:02:24,949 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 26 treesize of output 13 [2024-11-13 15:02:24,980 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2024-11-13 15:02:24,980 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 19 treesize of output 19 [2024-11-13 15:02:25,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:02:25,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-11-13 15:02:25,447 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 15 treesize of output 7 [2024-11-13 15:02:27,899 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 29 treesize of output 17 [2024-11-13 15:02:28,642 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:02:28,643 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 25 treesize of output 13 [2024-11-13 15:02:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:02:28,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:02:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:02:28,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:02:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422818611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:02:30,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:02:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2024-11-13 15:02:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55010310] [2024-11-13 15:02:30,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:02:30,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 15:02:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 15:02:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3036, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 15:02:30,107 INFO L87 Difference]: Start difference. First operand 368 states and 433 transitions. Second operand has 53 states, 52 states have (on average 2.6538461538461537) internal successors, (138), 51 states have internal predecessors, (138), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:02:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:50,867 INFO L93 Difference]: Finished difference Result 535 states and 623 transitions. [2024-11-13 15:02:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-13 15:02:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.6538461538461537) internal successors, (138), 51 states have internal predecessors, (138), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 84 [2024-11-13 15:02:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:50,870 INFO L225 Difference]: With dead ends: 535 [2024-11-13 15:02:50,870 INFO L226 Difference]: Without dead ends: 535 [2024-11-13 15:02:50,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=557, Invalid=9145, Unknown=0, NotChecked=0, Total=9702 [2024-11-13 15:02:50,872 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 525 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 5212 mSolverCounterSat, 80 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 5212 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:50,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 2173 Invalid, 5296 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 5212 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2024-11-13 15:02:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2024-11-13 15:02:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 444. [2024-11-13 15:02:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 366 states have (on average 1.319672131147541) internal successors, (483), 405 states have internal predecessors, (483), 33 states have call successors, (33), 16 states have call predecessors, (33), 15 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-13 15:02:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 542 transitions. [2024-11-13 15:02:50,886 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 542 transitions. Word has length 84 [2024-11-13 15:02:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:50,886 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 542 transitions. [2024-11-13 15:02:50,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.6538461538461537) internal successors, (138), 51 states have internal predecessors, (138), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:02:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 542 transitions. [2024-11-13 15:02:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 15:02:50,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:50,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:50,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 15:02:51,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 15:02:51,089 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:02:51,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1420737913, now seen corresponding path program 1 times [2024-11-13 15:02:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991290737] [2024-11-13 15:02:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:52,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:02:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:52,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:02:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:52,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:02:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:52,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:02:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:02:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 15:02:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:02:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991290737] [2024-11-13 15:02:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991290737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:02:52,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:02:52,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2024-11-13 15:02:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700323721] [2024-11-13 15:02:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:02:52,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 15:02:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:02:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 15:02:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:02:52,705 INFO L87 Difference]: Start difference. First operand 444 states and 542 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:02:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:02:58,012 INFO L93 Difference]: Finished difference Result 493 states and 598 transitions. [2024-11-13 15:02:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:02:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 84 [2024-11-13 15:02:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:02:58,015 INFO L225 Difference]: With dead ends: 493 [2024-11-13 15:02:58,015 INFO L226 Difference]: Without dead ends: 493 [2024-11-13 15:02:58,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:02:58,015 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 167 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:02:58,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1179 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-13 15:02:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-13 15:02:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 444. [2024-11-13 15:02:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 366 states have (on average 1.3169398907103824) internal successors, (482), 405 states have internal predecessors, (482), 33 states have call successors, (33), 16 states have call predecessors, (33), 15 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-13 15:02:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 541 transitions. [2024-11-13 15:02:58,031 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 541 transitions. Word has length 84 [2024-11-13 15:02:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:02:58,031 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 541 transitions. [2024-11-13 15:02:58,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:02:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 541 transitions. [2024-11-13 15:02:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:02:58,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:02:58,033 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:02:58,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-13 15:02:58,033 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:02:58,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:02:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -292398032, now seen corresponding path program 1 times [2024-11-13 15:02:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:02:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590386916] [2024-11-13 15:02:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:02:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:02:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:00,515 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:03:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:00,532 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:03:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:01,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:03:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:04,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 15:03:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:03:06,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:03:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590386916] [2024-11-13 15:03:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590386916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889152982] [2024-11-13 15:03:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:03:06,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:03:06,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:03:06,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:03:06,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:03:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:03:07,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-11-13 15:03:07,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:03:08,357 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 [2024-11-13 15:03:08,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:03:09,252 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 11 [2024-11-13 15:03:09,260 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 [2024-11-13 15:03:09,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:03:11,275 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 11 [2024-11-13 15:03:11,293 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 11 [2024-11-13 15:03:12,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-13 15:03:12,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:03:12,698 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 43 treesize of output 27 [2024-11-13 15:03:12,705 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 15 treesize of output 7 [2024-11-13 15:03:13,117 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 [2024-11-13 15:03:13,127 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 [2024-11-13 15:03:13,689 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 15 treesize of output 7 [2024-11-13 15:03:13,703 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 [2024-11-13 15:03:13,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:03:15,767 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_27| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_27|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_41| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_41|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-13 15:03:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:15,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:03:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:15,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:03:15,999 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-11-13 15:03:15,999 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 21 treesize of output 29 [2024-11-13 15:03:16,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:03:16,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:03:16,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:03:19,070 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_27| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_27|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_28|) 0) 0)) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_41| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_41|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-13 15:03:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:03:19,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:03:19,370 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-13 15:03:19,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-13 15:03:19,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:03:20,593 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:20,594 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 34 treesize of output 22 [2024-11-13 15:03:20,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:20,696 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 15:03:20,696 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 21 [2024-11-13 15:03:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:21,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:03:21,142 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:21,144 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:03:21,170 INFO L349 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2024-11-13 15:03:21,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 16 [2024-11-13 15:03:22,236 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 15 treesize of output 7 [2024-11-13 15:03:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 20 not checked. [2024-11-13 15:03:22,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:03:26,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889152982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:03:26,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:03:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 40] total 73 [2024-11-13 15:03:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696861691] [2024-11-13 15:03:26,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:03:26,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-13 15:03:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:03:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-13 15:03:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5588, Unknown=2, NotChecked=302, Total=6162 [2024-11-13 15:03:26,790 INFO L87 Difference]: Start difference. First operand 444 states and 541 transitions. Second operand has 73 states, 70 states have (on average 2.142857142857143) internal successors, (150), 68 states have internal predecessors, (150), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:04:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:09,934 INFO L93 Difference]: Finished difference Result 669 states and 811 transitions. [2024-11-13 15:04:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-13 15:04:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 70 states have (on average 2.142857142857143) internal successors, (150), 68 states have internal predecessors, (150), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 86 [2024-11-13 15:04:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:09,937 INFO L225 Difference]: With dead ends: 669 [2024-11-13 15:04:09,937 INFO L226 Difference]: Without dead ends: 669 [2024-11-13 15:04:09,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=916, Invalid=15346, Unknown=2, NotChecked=506, Total=16770 [2024-11-13 15:04:09,938 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 432 mSDsluCounter, 3481 mSDsCounter, 0 mSdLazyCounter, 6194 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 7047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:09,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 3580 Invalid, 7047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [99 Valid, 6194 Invalid, 0 Unknown, 754 Unchecked, 21.8s Time] [2024-11-13 15:04:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2024-11-13 15:04:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 537. [2024-11-13 15:04:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 449 states have (on average 1.3051224944320712) internal successors, (586), 489 states have internal predecessors, (586), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:04:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 657 transitions. [2024-11-13 15:04:09,955 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 657 transitions. Word has length 86 [2024-11-13 15:04:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:09,955 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 657 transitions. [2024-11-13 15:04:09,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 70 states have (on average 2.142857142857143) internal successors, (150), 68 states have internal predecessors, (150), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:04:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 657 transitions. [2024-11-13 15:04:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:04:09,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:09,956 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:04:09,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 15:04:10,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-13 15:04:10,157 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting check_seq_nextErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:04:10,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:10,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1310937702, now seen corresponding path program 1 times [2024-11-13 15:04:10,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:10,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465597588] [2024-11-13 15:04:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:10,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:12,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:04:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:12,083 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:04:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:12,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:04:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:14,166 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 15:04:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:04:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:15,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465597588] [2024-11-13 15:04:15,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465597588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48618976] [2024-11-13 15:04:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:15,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:15,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:04:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:16,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-13 15:04:16,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:18,152 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 [2024-11-13 15:04:20,179 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 11 [2024-11-13 15:04:20,533 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 [2024-11-13 15:04:20,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 26 [2024-11-13 15:04:20,928 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2024-11-13 15:04:20,929 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 37 treesize of output 53 [2024-11-13 15:04:21,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 47 [2024-11-13 15:04:21,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-11-13 15:04:21,744 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 [2024-11-13 15:04:21,753 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 [2024-11-13 15:04:22,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2024-11-13 15:04:22,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:04:23,494 WARN L873 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= |c_#valid| (store |c_old(#valid)| |chain_node_~node~0#1.base| 1)) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2024-11-13 15:04:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:04:23,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 46 [2024-11-13 15:04:23,670 INFO L349 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2024-11-13 15:04:23,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 65 [2024-11-13 15:04:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:04:24,384 INFO L349 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2024-11-13 15:04:24,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 53 [2024-11-13 15:04:25,280 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-13 15:04:25,280 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 128 treesize of output 108 [2024-11-13 15:04:25,387 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-13 15:04:25,388 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 96 treesize of output 88 [2024-11-13 15:04:27,288 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 64 treesize of output 40 [2024-11-13 15:04:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 12 not checked. [2024-11-13 15:04:28,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:04:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48618976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:28,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:04:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 65 [2024-11-13 15:04:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478971547] [2024-11-13 15:04:28,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:04:28,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-13 15:04:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:04:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-13 15:04:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4085, Unknown=1, NotChecked=128, Total=4422 [2024-11-13 15:04:28,731 INFO L87 Difference]: Start difference. First operand 537 states and 657 transitions. Second operand has 66 states, 64 states have (on average 2.390625) internal successors, (153), 61 states have internal predecessors, (153), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:04:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:04:45,199 INFO L93 Difference]: Finished difference Result 637 states and 787 transitions. [2024-11-13 15:04:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:04:45,200 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 2.390625) internal successors, (153), 61 states have internal predecessors, (153), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 86 [2024-11-13 15:04:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:04:45,201 INFO L225 Difference]: With dead ends: 637 [2024-11-13 15:04:45,201 INFO L226 Difference]: Without dead ends: 637 [2024-11-13 15:04:45,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=458, Invalid=7201, Unknown=1, NotChecked=172, Total=7832 [2024-11-13 15:04:45,202 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 490 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 4419 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 4802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:04:45,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 2339 Invalid, 4802 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [100 Valid, 4419 Invalid, 0 Unknown, 283 Unchecked, 12.0s Time] [2024-11-13 15:04:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2024-11-13 15:04:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 545. [2024-11-13 15:04:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 457 states have (on average 1.312910284463895) internal successors, (600), 497 states have internal predecessors, (600), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 27 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:04:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 671 transitions. [2024-11-13 15:04:45,217 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 671 transitions. Word has length 86 [2024-11-13 15:04:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:04:45,218 INFO L471 AbstractCegarLoop]: Abstraction has 545 states and 671 transitions. [2024-11-13 15:04:45,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 2.390625) internal successors, (153), 61 states have internal predecessors, (153), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:04:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 671 transitions. [2024-11-13 15:04:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:04:45,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:04:45,220 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:04:45,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:04:45,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-13 15:04:45,421 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting check_seq_nextErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:04:45,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:04:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1310937701, now seen corresponding path program 1 times [2024-11-13 15:04:45,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:04:45,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768516352] [2024-11-13 15:04:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:45,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:04:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:47,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:04:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:47,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:04:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:48,013 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:04:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:49,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 15:04:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:04:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:04:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768516352] [2024-11-13 15:04:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768516352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:04:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101792693] [2024-11-13 15:04:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:04:52,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:04:52,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:04:52,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:04:52,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:04:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:04:52,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-13 15:04:52,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:04:53,141 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 [2024-11-13 15:04:53,696 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 [2024-11-13 15:04:53,708 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 [2024-11-13 15:04:55,681 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 11 [2024-11-13 15:04:55,720 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 11 [2024-11-13 15:04:56,160 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_chain_node_~ppnode#1.offset_107| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_107|)) (.cse3 (select |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base|)) (.cse0 (select |c_old(#memory_$Pointer$#2.offset)| |c_chain_node_#in~ppnode#1.base|)) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_107|))) (and (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |c_chain_node_#in~ppnode#1.base| (store .cse0 |v_chain_node_~ppnode#1.offset_107| .cse1))) (<= .cse1 0) (= |c_#valid| (store |c_old(#valid)| .cse2 1)) (= (select .cse3 |v_chain_node_~ppnode#1.offset_107|) (select (select |c_#memory_$Pointer$#4.base| .cse2) 0)) (<= 0 |v_chain_node_~ppnode#1.offset_107|) (= (store |c_old(#length)| .cse2 (select |c_#length| .cse2)) |c_#length|) (<= |v_chain_node_~ppnode#1.offset_107| |c_chain_node_#in~ppnode#1.offset|) (= (store |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base| (store .cse3 |v_chain_node_~ppnode#1.offset_107| .cse2)) |c_#memory_$Pointer$#2.base|) (= (select |c_old(#valid)| .cse2) 0) (= (select .cse0 |v_chain_node_~ppnode#1.offset_107|) (select (select |c_#memory_$Pointer$#4.offset| .cse2) 0))))) is different from true [2024-11-13 15:04:56,311 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-13 15:04:56,311 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 29 treesize of output 37 [2024-11-13 15:04:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:56,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 30 [2024-11-13 15:04:56,335 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 30 treesize of output 17 [2024-11-13 15:04:56,347 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:56,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 15 [2024-11-13 15:04:56,880 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:56,881 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 70 treesize of output 42 [2024-11-13 15:04:56,891 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:04:56,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:04:56,898 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 [2024-11-13 15:04:57,212 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 [2024-11-13 15:04:57,221 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 [2024-11-13 15:04:57,624 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 43 treesize of output 19 [2024-11-13 15:04:57,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 15:04:57,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:04:57,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:04:59,097 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_50| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_50|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (select |c_#length| |chain_node_~node~0#1.base|))) (= (store |c_old(#memory_$Pointer$#4.offset)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$#4.offset|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-13 15:04:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:04:59,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2024-11-13 15:04:59,261 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-13 15:04:59,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-13 15:04:59,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-13 15:04:59,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:05:00,014 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:00,014 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 48 treesize of output 28 [2024-11-13 15:05:00,022 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:00,023 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:00,072 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 15:05:00,072 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 21 [2024-11-13 15:05:00,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-13 15:05:00,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:05:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 10 not checked. [2024-11-13 15:05:01,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:05:04,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101792693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:05:04,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:05:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2024-11-13 15:05:04,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464007135] [2024-11-13 15:05:04,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:05:04,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-13 15:05:04,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:05:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-13 15:05:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=3508, Unknown=2, NotChecked=238, Total=3906 [2024-11-13 15:05:04,684 INFO L87 Difference]: Start difference. First operand 545 states and 671 transitions. Second operand has 56 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 51 states have internal predecessors, (139), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:05:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:05:38,302 INFO L93 Difference]: Finished difference Result 721 states and 888 transitions. [2024-11-13 15:05:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 15:05:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 51 states have internal predecessors, (139), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 86 [2024-11-13 15:05:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:05:38,305 INFO L225 Difference]: With dead ends: 721 [2024-11-13 15:05:38,305 INFO L226 Difference]: Without dead ends: 721 [2024-11-13 15:05:38,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=494, Invalid=8254, Unknown=2, NotChecked=370, Total=9120 [2024-11-13 15:05:38,306 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 401 mSDsluCounter, 2791 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 7101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 693 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:05:38,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2888 Invalid, 7101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 6351 Invalid, 0 Unknown, 693 Unchecked, 22.3s Time] [2024-11-13 15:05:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2024-11-13 15:05:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 534. [2024-11-13 15:05:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 446 states have (on average 1.311659192825112) internal successors, (585), 487 states have internal predecessors, (585), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:05:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 656 transitions. [2024-11-13 15:05:38,322 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 656 transitions. Word has length 86 [2024-11-13 15:05:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:05:38,323 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 656 transitions. [2024-11-13 15:05:38,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.5272727272727273) internal successors, (139), 51 states have internal predecessors, (139), 8 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:05:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 656 transitions. [2024-11-13 15:05:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:05:38,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:05:38,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:05:38,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 15:05:38,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-13 15:05:38,525 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:05:38,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:05:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash 470475035, now seen corresponding path program 1 times [2024-11-13 15:05:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:05:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883478171] [2024-11-13 15:05:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:05:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:05:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:38,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:05:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:38,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:05:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:38,723 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:05:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:38,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:05:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 15:05:38,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:05:38,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883478171] [2024-11-13 15:05:38,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883478171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:05:38,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:05:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:05:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2797910] [2024-11-13 15:05:38,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:05:38,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:05:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:05:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:05:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:05:38,739 INFO L87 Difference]: Start difference. First operand 534 states and 656 transitions. Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:05:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:05:39,849 INFO L93 Difference]: Finished difference Result 534 states and 653 transitions. [2024-11-13 15:05:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:05:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 86 [2024-11-13 15:05:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:05:39,853 INFO L225 Difference]: With dead ends: 534 [2024-11-13 15:05:39,853 INFO L226 Difference]: Without dead ends: 534 [2024-11-13 15:05:39,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:05:39,854 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 56 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:05:39,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 328 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:05:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2024-11-13 15:05:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 534. [2024-11-13 15:05:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 446 states have (on average 1.304932735426009) internal successors, (582), 487 states have internal predecessors, (582), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:05:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 653 transitions. [2024-11-13 15:05:39,887 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 653 transitions. Word has length 86 [2024-11-13 15:05:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:05:39,887 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 653 transitions. [2024-11-13 15:05:39,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 15:05:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 653 transitions. [2024-11-13 15:05:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 15:05:39,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:05:39,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:05:39,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-13 15:05:39,893 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:05:39,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:05:39,893 INFO L85 PathProgramCache]: Analyzing trace with hash 470475036, now seen corresponding path program 1 times [2024-11-13 15:05:39,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:05:39,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349670723] [2024-11-13 15:05:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:05:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:05:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:41,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:05:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:41,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:05:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:41,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:05:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:41,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:05:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:05:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:05:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349670723] [2024-11-13 15:05:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349670723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:05:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248627112] [2024-11-13 15:05:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:05:41,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:05:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:05:41,972 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:05:41,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:05:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:05:42,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-13 15:05:42,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:05:43,151 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 11 [2024-11-13 15:05:43,163 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 11 [2024-11-13 15:05:43,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:05:43,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:05:44,000 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 11 [2024-11-13 15:05:44,033 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 11 [2024-11-13 15:05:44,315 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_chain_node_~ppnode#1.offset_111| Int)) (let ((.cse2 (select |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base|)) (.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_111|)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_111|)) (.cse3 (select |c_old(#memory_$Pointer$#2.offset)| |c_chain_node_#in~ppnode#1.base|))) (and (= (select (select |c_#memory_$Pointer$#4.base| .cse0) .cse1) (select .cse2 |v_chain_node_~ppnode#1.offset_111|)) (<= |v_chain_node_~ppnode#1.offset_111| |c_chain_node_#in~ppnode#1.offset|) (<= 0 |v_chain_node_~ppnode#1.offset_111|) (= |c_#memory_$Pointer$#2.offset| (store |c_old(#memory_$Pointer$#2.offset)| |c_chain_node_#in~ppnode#1.base| (store .cse3 |v_chain_node_~ppnode#1.offset_111| .cse1))) (= (store |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base| (store .cse2 |v_chain_node_~ppnode#1.offset_111| .cse0)) |c_#memory_$Pointer$#2.base|) (= (select (select |c_#memory_$Pointer$#4.offset| .cse0) .cse1) (select .cse3 |v_chain_node_~ppnode#1.offset_111|))))) is different from true [2024-11-13 15:05:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:44,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2024-11-13 15:05:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:44,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2024-11-13 15:05:44,773 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:44,774 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 46 treesize of output 34 [2024-11-13 15:05:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:44,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:05:44,795 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 38 treesize of output 29 [2024-11-13 15:05:45,646 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:45,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:05:45,661 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:05:45,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:05:45,667 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 19 treesize of output 14 [2024-11-13 15:05:46,711 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 23 treesize of output 15 [2024-11-13 15:05:46,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-13 15:05:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:05:47,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:05:47,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:05:47,646 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 31 treesize of output 35 [2024-11-13 15:05:48,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:05:48,575 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 83 treesize of output 109 [2024-11-13 15:05:53,000 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 153 treesize of output 135 [2024-11-13 15:05:53,008 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 221 treesize of output 185 [2024-11-13 15:05:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248627112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:05:53,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:05:53,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2024-11-13 15:05:53,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449051022] [2024-11-13 15:05:53,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:05:53,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 15:05:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:05:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 15:05:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2144, Unknown=1, NotChecked=92, Total=2352 [2024-11-13 15:05:53,725 INFO L87 Difference]: Start difference. First operand 534 states and 653 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:06:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:06:14,658 INFO L93 Difference]: Finished difference Result 693 states and 835 transitions. [2024-11-13 15:06:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 15:06:14,659 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 86 [2024-11-13 15:06:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:06:14,661 INFO L225 Difference]: With dead ends: 693 [2024-11-13 15:06:14,661 INFO L226 Difference]: Without dead ends: 693 [2024-11-13 15:06:14,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=432, Invalid=7053, Unknown=1, NotChecked=170, Total=7656 [2024-11-13 15:06:14,662 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 466 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:06:14,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 2328 Invalid, 5432 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [90 Valid, 4910 Invalid, 0 Unknown, 432 Unchecked, 13.8s Time] [2024-11-13 15:06:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-11-13 15:06:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 537. [2024-11-13 15:06:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 449 states have (on average 1.3051224944320712) internal successors, (586), 490 states have internal predecessors, (586), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:06:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 657 transitions. [2024-11-13 15:06:14,677 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 657 transitions. Word has length 86 [2024-11-13 15:06:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:06:14,678 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 657 transitions. [2024-11-13 15:06:14,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 39 states have internal predecessors, (134), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 15:06:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 657 transitions. [2024-11-13 15:06:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 15:06:14,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:06:14,680 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:14,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 15:06:14,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 15:06:14,880 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:06:14,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1377324300, now seen corresponding path program 1 times [2024-11-13 15:06:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:14,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790595846] [2024-11-13 15:06:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:16,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:06:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:16,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:06:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:16,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 15:06:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:17,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 15:06:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:06:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790595846] [2024-11-13 15:06:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790595846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700974463] [2024-11-13 15:06:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:19,059 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:19,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 15:06:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:19,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-13 15:06:19,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:20,761 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 [2024-11-13 15:06:22,001 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 11 [2024-11-13 15:06:22,297 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 [2024-11-13 15:06:22,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2024-11-13 15:06:22,939 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 29 treesize of output 17 [2024-11-13 15:06:22,959 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 15 treesize of output 7 [2024-11-13 15:06:23,188 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 [2024-11-13 15:06:23,197 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 [2024-11-13 15:06:23,541 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 [2024-11-13 15:06:23,552 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 12 treesize of output 4 [2024-11-13 15:06:24,993 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_57| Int)) (<= (select (select |c_#memory_$Pointer$#3.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_57|) 0) 0)) (exists ((|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$#4.base| (store |c_old(#memory_$Pointer$#4.base)| |chain_node_~node~0#1.base| (select |c_#memory_$Pointer$#4.base| |chain_node_~node~0#1.base|))) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0)))) is different from true [2024-11-13 15:06:25,134 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:06:25,135 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 [2024-11-13 15:06:25,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2024-11-13 15:06:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:25,833 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 20 treesize of output 12 [2024-11-13 15:06:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:25,849 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:25,908 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 15:06:25,909 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 21 [2024-11-13 15:06:26,750 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 [2024-11-13 15:06:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 12 not checked. [2024-11-13 15:06:26,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:06:28,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700974463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:28,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:06:28,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33] total 55 [2024-11-13 15:06:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477877159] [2024-11-13 15:06:28,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:06:28,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 15:06:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:06:28,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 15:06:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3231, Unknown=2, NotChecked=114, Total=3540 [2024-11-13 15:06:28,457 INFO L87 Difference]: Start difference. First operand 537 states and 657 transitions. Second operand has 55 states, 54 states have (on average 2.574074074074074) internal successors, (139), 50 states have internal predecessors, (139), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:06:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:06:46,742 INFO L93 Difference]: Finished difference Result 646 states and 778 transitions. [2024-11-13 15:06:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 15:06:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.574074074074074) internal successors, (139), 50 states have internal predecessors, (139), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 88 [2024-11-13 15:06:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:06:46,746 INFO L225 Difference]: With dead ends: 646 [2024-11-13 15:06:46,752 INFO L226 Difference]: Without dead ends: 646 [2024-11-13 15:06:46,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=644, Invalid=8670, Unknown=2, NotChecked=190, Total=9506 [2024-11-13 15:06:46,757 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 504 mSDsluCounter, 2448 mSDsCounter, 0 mSdLazyCounter, 3930 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 4390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:06:46,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 2557 Invalid, 4390 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 3930 Invalid, 0 Unknown, 374 Unchecked, 11.1s Time] [2024-11-13 15:06:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2024-11-13 15:06:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 537. [2024-11-13 15:06:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 449 states have (on average 1.3028953229398663) internal successors, (585), 490 states have internal predecessors, (585), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-13 15:06:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 656 transitions. [2024-11-13 15:06:46,813 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 656 transitions. Word has length 88 [2024-11-13 15:06:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:06:46,813 INFO L471 AbstractCegarLoop]: Abstraction has 537 states and 656 transitions. [2024-11-13 15:06:46,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.574074074074074) internal successors, (139), 50 states have internal predecessors, (139), 10 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 15:06:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 656 transitions. [2024-11-13 15:06:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-13 15:06:46,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:06:46,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:06:46,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 15:06:47,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:47,018 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:06:47,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:06:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1443761025, now seen corresponding path program 1 times [2024-11-13 15:06:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:06:47,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914499187] [2024-11-13 15:06:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:06:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:51,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:06:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:52,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:06:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:52,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:06:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:53,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:06:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 15:06:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:06:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914499187] [2024-11-13 15:06:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914499187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:06:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401410906] [2024-11-13 15:06:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:06:53,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:06:53,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:06:54,000 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:06:54,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 15:06:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:06:54,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-11-13 15:06:54,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:06:55,018 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 [2024-11-13 15:06:56,338 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 [2024-11-13 15:06:56,346 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 [2024-11-13 15:06:57,379 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:57,380 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 15 treesize of output 7 [2024-11-13 15:06:57,871 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 11 [2024-11-13 15:06:57,879 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 [2024-11-13 15:06:58,440 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:06:58,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:06:58,447 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 30 treesize of output 21 [2024-11-13 15:06:58,456 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 [2024-11-13 15:06:58,463 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 [2024-11-13 15:07:01,041 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 [2024-11-13 15:07:01,105 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_31| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#p2~0#1.base_BEFORE_CALL_31|) 0) 0)) (exists ((|v_chain_node_~ppnode#1.offset_124| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_124|))) (let ((.cse1 (select |c_#length| .cse0))) (and (= (select |c_old(#valid)| .cse0) 0) (<= .cse1 8) (= (store |c_old(#length)| .cse0 .cse1) |c_#length|) (<= |v_chain_node_~ppnode#1.offset_124| |c_chain_node_#in~ppnode#1.offset|) (= (store |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base| (store (select |c_old(#memory_$Pointer$#2.base)| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_124| .cse0)) |c_#memory_$Pointer$#2.base|) (= |c_#valid| (store |c_old(#valid)| .cse0 1)) (= (select (select |c_#memory_$Pointer$#2.offset| |c_chain_node_#in~ppnode#1.base|) |v_chain_node_~ppnode#1.offset_124|) 0) (<= 0 |v_chain_node_~ppnode#1.offset_124|)))))) is different from true [2024-11-13 15:07:01,231 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:01,234 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:01,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2024-11-13 15:07:01,352 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-13 15:07:01,352 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 29 treesize of output 37 [2024-11-13 15:07:01,378 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 26 treesize of output 13 [2024-11-13 15:07:02,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:07:03,503 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 11 [2024-11-13 15:07:03,513 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 [2024-11-13 15:07:04,149 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 42 treesize of output 26 [2024-11-13 15:07:04,158 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 19 treesize of output 7 [2024-11-13 15:07:04,166 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 19 treesize of output 7 [2024-11-13 15:07:06,697 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 11 [2024-11-13 15:07:07,285 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 [2024-11-13 15:07:09,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 41 [2024-11-13 15:07:09,740 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-13 15:07:09,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2024-11-13 15:07:09,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2024-11-13 15:07:11,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 40 [2024-11-13 15:07:11,028 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 23 treesize of output 15 [2024-11-13 15:07:14,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:14,382 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 15:07:14,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 13 [2024-11-13 15:07:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:20,486 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:20,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:07:20,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 110 [2024-11-13 15:07:20,629 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:20,633 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:20,642 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 15:07:20,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 39 [2024-11-13 15:07:23,020 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:07:23,077 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 15:07:23,077 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 74 treesize of output 57 [2024-11-13 15:07:26,530 INFO L349 Elim1Store]: treesize reduction 170, result has 26.7 percent of original size [2024-11-13 15:07:26,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 122 [2024-11-13 15:07:28,042 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-13 15:07:28,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2024-11-13 15:07:32,619 INFO L349 Elim1Store]: treesize reduction 32, result has 83.1 percent of original size [2024-11-13 15:07:32,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 259 treesize of output 326 [2024-11-13 15:07:32,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-11-13 15:07:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:07:39,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:07:46,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:07:46,346 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 76 treesize of output 94 [2024-11-13 15:07:47,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401410906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:07:47,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:07:47,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 50] total 85 [2024-11-13 15:07:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728840618] [2024-11-13 15:07:47,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:07:47,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-13 15:07:47,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:07:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-13 15:07:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=8863, Unknown=2, NotChecked=188, Total=9312 [2024-11-13 15:07:47,762 INFO L87 Difference]: Start difference. First operand 537 states and 656 transitions. Second operand has 86 states, 81 states have (on average 1.8518518518518519) internal successors, (150), 82 states have internal predecessors, (150), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:09:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:09:12,091 INFO L93 Difference]: Finished difference Result 802 states and 971 transitions. [2024-11-13 15:09:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-13 15:09:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 81 states have (on average 1.8518518518518519) internal successors, (150), 82 states have internal predecessors, (150), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 89 [2024-11-13 15:09:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:09:12,093 INFO L225 Difference]: With dead ends: 802 [2024-11-13 15:09:12,094 INFO L226 Difference]: Without dead ends: 802 [2024-11-13 15:09:12,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6359 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=1096, Invalid=30058, Unknown=2, NotChecked=350, Total=31506 [2024-11-13 15:09:12,096 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 822 mSDsluCounter, 4116 mSDsCounter, 0 mSdLazyCounter, 12029 mSolverCounterSat, 151 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 4194 SdHoareTripleChecker+Invalid, 12715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 12029 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:09:12,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 4194 Invalid, 12715 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 12029 Invalid, 7 Unknown, 528 Unchecked, 42.7s Time] [2024-11-13 15:09:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2024-11-13 15:09:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 558. [2024-11-13 15:09:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 469 states have (on average 1.2963752665245203) internal successors, (608), 510 states have internal predecessors, (608), 39 states have call successors, (39), 20 states have call predecessors, (39), 20 states have return successors, (33), 27 states have call predecessors, (33), 32 states have call successors, (33) [2024-11-13 15:09:12,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 680 transitions. [2024-11-13 15:09:12,112 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 680 transitions. Word has length 89 [2024-11-13 15:09:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:09:12,112 INFO L471 AbstractCegarLoop]: Abstraction has 558 states and 680 transitions. [2024-11-13 15:09:12,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 81 states have (on average 1.8518518518518519) internal successors, (150), 82 states have internal predecessors, (150), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:09:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 680 transitions. [2024-11-13 15:09:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-13 15:09:12,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:09:12,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:12,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 15:09:12,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:12,315 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, chain_nodeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2024-11-13 15:09:12,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1443761024, now seen corresponding path program 1 times [2024-11-13 15:09:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:12,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350825116] [2024-11-13 15:09:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:12,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:14,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 15:09:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:14,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 15:09:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:15,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 15:09:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:16,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-13 15:09:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:09:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350825116] [2024-11-13 15:09:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350825116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491504408] [2024-11-13 15:09:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:16,739 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:16,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb24bdf1-e19a-4774-83c7-93f135511664/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 15:09:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:17,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-13 15:09:17,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:18,335 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 [2024-11-13 15:09:19,077 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 11 [2024-11-13 15:09:19,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:09:20,345 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 [2024-11-13 15:09:20,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2024-11-13 15:09:21,186 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 11 [2024-11-13 15:09:21,193 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 [2024-11-13 15:09:21,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:09:22,681 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 11 [2024-11-13 15:09:22,699 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 11 [2024-11-13 15:09:23,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2024-11-13 15:09:23,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:09:23,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-11-13 15:09:23,948 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 34 treesize of output 22 [2024-11-13 15:09:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:25,112 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:25,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:09:25,129 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 18 [2024-11-13 15:09:28,373 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:28,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:28,424 INFO L349 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2024-11-13 15:09:28,424 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 38 treesize of output 37 [2024-11-13 15:09:28,841 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 23 treesize of output 15 [2024-11-13 15:09:28,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:09:29,742 INFO L349 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2024-11-13 15:09:29,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 30 [2024-11-13 15:09:30,546 INFO L349 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2024-11-13 15:09:30,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 33 [2024-11-13 15:09:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:30,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:31,445 INFO L349 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2024-11-13 15:09:31,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2024-11-13 15:09:32,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491504408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:32,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:09:32,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 43] total 70 [2024-11-13 15:09:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726886648] [2024-11-13 15:09:32,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:32,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 15:09:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 15:09:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=5610, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 15:09:32,525 INFO L87 Difference]: Start difference. First operand 558 states and 680 transitions. Second operand has 71 states, 67 states have (on average 2.298507462686567) internal successors, (154), 67 states have internal predecessors, (154), 7 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8)