./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU --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 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:30,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:31,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:14:31,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:31,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:31,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:31,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:31,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:31,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:31,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:31,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:31,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:31,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:31,074 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:31,076 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:31,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:31,077 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:31,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:31,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:31,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:31,081 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:14:31,082 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:14:31,082 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:14:31,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:31,083 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:14:31,084 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:31,084 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:14:31,085 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:31,085 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:31,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:31,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:31,086 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:31,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:31,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:31,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:31,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:31,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:31,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:31,089 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:31,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:31,090 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:31,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:31,091 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2024-10-31 22:14:31,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:31,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:31,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:31,462 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:31,462 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:31,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i Unable to find full path for "g++" [2024-10-31 22:14:33,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:34,134 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:34,135 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2024-10-31 22:14:34,164 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/data/b0a0846b1/87daf48ff28547229a105420b4b24f69/FLAG8ceaa8936 [2024-10-31 22:14:34,360 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/data/b0a0846b1/87daf48ff28547229a105420b4b24f69 [2024-10-31 22:14:34,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:34,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:34,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:34,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:34,381 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:34,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:34" (1/1) ... [2024-10-31 22:14:34,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4351cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:34, skipping insertion in model container [2024-10-31 22:14:34,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:34" (1/1) ... [2024-10-31 22:14:34,453 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:35,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:35,047 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:35,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:35,155 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:35,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35 WrapperNode [2024-10-31 22:14:35,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:35,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:35,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:35,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:35,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,261 INFO L138 Inliner]: procedures = 127, calls = 41, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 145 [2024-10-31 22:14:35,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:35,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:35,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:35,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:35,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,354 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 16, 6]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 9 writes are split as follows [0, 8, 1]. [2024-10-31 22:14:35,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:35,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:35,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:35,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:35,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (1/1) ... [2024-10-31 22:14:35,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:35,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:35,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:14:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:14:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:14:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:14:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:14:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:14:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-10-31 22:14:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-10-31 22:14:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:14:35,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:35,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:14:35,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:14:35,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:14:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:14:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:14:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:14:35,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:14:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:14:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:14:35,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:14:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:14:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:14:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:14:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:35,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:35,768 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:35,771 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:36,301 INFO L? ?]: Removed 122 outVars from TransFormulas that were not future-live. [2024-10-31 22:14:36,301 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:36,325 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:36,329 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:14:36,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:36 BoogieIcfgContainer [2024-10-31 22:14:36,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:36,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:36,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:36,340 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:36,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:34" (1/3) ... [2024-10-31 22:14:36,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150dfa8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:36, skipping insertion in model container [2024-10-31 22:14:36,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:35" (2/3) ... [2024-10-31 22:14:36,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150dfa8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:36, skipping insertion in model container [2024-10-31 22:14:36,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:36" (3/3) ... [2024-10-31 22:14:36,345 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2024-10-31 22:14:36,372 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:36,372 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2024-10-31 22:14:36,502 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:36,514 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;@431fb1b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:36,515 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-31 22:14:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 108 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:14:36,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:36,546 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:36,549 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:36,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1816241367, now seen corresponding path program 1 times [2024-10-31 22:14:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373837395] [2024-10-31 22:14:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:36,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373837395] [2024-10-31 22:14:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373837395] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:36,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:36,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:36,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995591690] [2024-10-31 22:14:36,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:36,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:37,030 INFO L87 Difference]: Start difference. First operand has 112 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 108 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:37,209 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2024-10-31 22:14:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:14:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:37,223 INFO L225 Difference]: With dead ends: 108 [2024-10-31 22:14:37,223 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 22:14:37,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:37,233 INFO L432 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:37,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 174 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 22:14:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-10-31 22:14:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.896551724137931) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2024-10-31 22:14:37,295 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 7 [2024-10-31 22:14:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:37,296 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2024-10-31 22:14:37,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2024-10-31 22:14:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-31 22:14:37,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:37,297 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:37,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:37,298 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:37,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1816241368, now seen corresponding path program 1 times [2024-10-31 22:14:37,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:37,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243031860] [2024-10-31 22:14:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:37,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:37,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243031860] [2024-10-31 22:14:37,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243031860] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:37,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:37,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072509789] [2024-10-31 22:14:37,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:37,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:37,489 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:37,614 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2024-10-31 22:14:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-31 22:14:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:37,617 INFO L225 Difference]: With dead ends: 102 [2024-10-31 22:14:37,617 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 22:14:37,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:37,618 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 3 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:37,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 22:14:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-10-31 22:14:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.8448275862068966) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2024-10-31 22:14:37,633 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 7 [2024-10-31 22:14:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:37,634 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2024-10-31 22:14:37,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2024-10-31 22:14:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:14:37,635 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:37,635 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:37,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:37,635 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:37,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2097530290, now seen corresponding path program 1 times [2024-10-31 22:14:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908912860] [2024-10-31 22:14:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:38,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:38,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:38,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908912860] [2024-10-31 22:14:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908912860] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:38,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:38,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:14:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221232380] [2024-10-31 22:14:38,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:38,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:38,300 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-31 22:14:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:38,682 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2024-10-31 22:14:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:38,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2024-10-31 22:14:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:38,684 INFO L225 Difference]: With dead ends: 100 [2024-10-31 22:14:38,684 INFO L226 Difference]: Without dead ends: 100 [2024-10-31 22:14:38,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:38,691 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 7 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:38,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 372 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:14:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-31 22:14:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-10-31 22:14:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 58 states have (on average 1.8103448275862069) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2024-10-31 22:14:38,705 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 14 [2024-10-31 22:14:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:38,706 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2024-10-31 22:14:38,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-31 22:14:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2024-10-31 22:14:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-31 22:14:38,708 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:38,708 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:38,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:38,708 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:38,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2097530291, now seen corresponding path program 1 times [2024-10-31 22:14:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566035353] [2024-10-31 22:14:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:38,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:38,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:38,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566035353] [2024-10-31 22:14:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566035353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:38,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:38,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:14:38,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546011671] [2024-10-31 22:14:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:38,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:38,924 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-31 22:14:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:39,262 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2024-10-31 22:14:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 14 [2024-10-31 22:14:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:39,264 INFO L225 Difference]: With dead ends: 98 [2024-10-31 22:14:39,264 INFO L226 Difference]: Without dead ends: 98 [2024-10-31 22:14:39,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:14:39,266 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 8 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:39,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 356 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:14:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-31 22:14:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-10-31 22:14:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2024-10-31 22:14:39,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 14 [2024-10-31 22:14:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:39,281 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2024-10-31 22:14:39,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2024-10-31 22:14:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2024-10-31 22:14:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:14:39,282 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:39,282 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:39,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:14:39,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:39,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -493202511, now seen corresponding path program 1 times [2024-10-31 22:14:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301095106] [2024-10-31 22:14:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:39,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:39,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-31 22:14:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:39,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:39,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301095106] [2024-10-31 22:14:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301095106] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:39,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:39,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415528640] [2024-10-31 22:14:39,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:39,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:39,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:39,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:39,445 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-31 22:14:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:39,589 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2024-10-31 22:14:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:39,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2024-10-31 22:14:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:39,591 INFO L225 Difference]: With dead ends: 108 [2024-10-31 22:14:39,591 INFO L226 Difference]: Without dead ends: 108 [2024-10-31 22:14:39,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:39,593 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 9 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:39,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 248 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-31 22:14:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2024-10-31 22:14:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-10-31 22:14:39,603 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 16 [2024-10-31 22:14:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:39,603 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-10-31 22:14:39,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-10-31 22:14:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-10-31 22:14:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-31 22:14:39,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:39,605 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:39,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:14:39,606 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:39,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash -45722425, now seen corresponding path program 1 times [2024-10-31 22:14:39,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:39,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137467905] [2024-10-31 22:14:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:39,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:39,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:39,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:39,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137467905] [2024-10-31 22:14:39,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137467905] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:39,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:39,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:14:39,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713170318] [2024-10-31 22:14:39,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:39,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:39,761 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-10-31 22:14:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:39,916 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-10-31 22:14:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2024-10-31 22:14:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:39,918 INFO L225 Difference]: With dead ends: 104 [2024-10-31 22:14:39,918 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 22:14:39,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:39,920 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:39,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 22:14:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-31 22:14:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.7142857142857142) internal successors, (108), 99 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-10-31 22:14:39,936 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 17 [2024-10-31 22:14:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:39,936 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-10-31 22:14:39,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-10-31 22:14:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-10-31 22:14:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 22:14:39,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:39,938 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:39,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:14:39,938 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:39,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash 714012245, now seen corresponding path program 1 times [2024-10-31 22:14:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:39,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108772407] [2024-10-31 22:14:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:40,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:40,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 22:14:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 22:14:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108772407] [2024-10-31 22:14:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108772407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937521040] [2024-10-31 22:14:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:40,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:40,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:40,136 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:40,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:40,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:14:40,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:40,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 22:14:40,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937521040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:40,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:40,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-10-31 22:14:40,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863689762] [2024-10-31 22:14:40,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:40,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:40,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:40,483 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:14:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:40,633 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-10-31 22:14:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-10-31 22:14:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:40,634 INFO L225 Difference]: With dead ends: 106 [2024-10-31 22:14:40,635 INFO L226 Difference]: Without dead ends: 106 [2024-10-31 22:14:40,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:40,636 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 9 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:40,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 255 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:14:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-31 22:14:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-10-31 22:14:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 101 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2024-10-31 22:14:40,649 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 31 [2024-10-31 22:14:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:40,654 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2024-10-31 22:14:40,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-31 22:14:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2024-10-31 22:14:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 22:14:40,655 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:40,655 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:40,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:14:40,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:40,856 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:40,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1276770653, now seen corresponding path program 1 times [2024-10-31 22:14:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:40,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882890598] [2024-10-31 22:14:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:40,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:41,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:41,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882890598] [2024-10-31 22:14:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882890598] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775730383] [2024-10-31 22:14:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:41,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:41,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:41,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:14:41,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:41,583 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-10-31 22:14:41,691 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:14:41,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:14:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:41,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775730383] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:41,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:41,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2024-10-31 22:14:41,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512862823] [2024-10-31 22:14:41,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:41,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:14:41,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:41,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:14:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2024-10-31 22:14:41,790 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:14:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:42,191 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2024-10-31 22:14:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-10-31 22:14:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:42,193 INFO L225 Difference]: With dead ends: 105 [2024-10-31 22:14:42,193 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 22:14:42,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2024-10-31 22:14:42,195 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:42,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 415 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 350 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2024-10-31 22:14:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 22:14:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-10-31 22:14:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.676923076923077) internal successors, (109), 100 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-10-31 22:14:42,205 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 32 [2024-10-31 22:14:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:42,206 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-10-31 22:14:42,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:14:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-10-31 22:14:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-31 22:14:42,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:42,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:42,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:42,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:42,409 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:42,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1276770652, now seen corresponding path program 1 times [2024-10-31 22:14:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029737348] [2024-10-31 22:14:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029737348] [2024-10-31 22:14:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029737348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944894751] [2024-10-31 22:14:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:43,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:43,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:43,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:43,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:14:43,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:43,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:14:43,965 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-10-31 22:14:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:44,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:44,058 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:14:44,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:14:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-10-31 22:14:44,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944894751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:44,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-10-31 22:14:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215411011] [2024-10-31 22:14:44,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:14:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:14:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=329, Unknown=1, NotChecked=36, Total=420 [2024-10-31 22:14:44,307 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:14:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:45,373 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-10-31 22:14:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:14:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-10-31 22:14:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:45,376 INFO L225 Difference]: With dead ends: 104 [2024-10-31 22:14:45,376 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 22:14:45,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=476, Unknown=1, NotChecked=44, Total=600 [2024-10-31 22:14:45,377 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:45,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 739 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 654 Invalid, 0 Unknown, 105 Unchecked, 0.8s Time] [2024-10-31 22:14:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 22:14:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-10-31 22:14:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 99 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-10-31 22:14:45,388 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 32 [2024-10-31 22:14:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:45,388 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-10-31 22:14:45,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:14:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-10-31 22:14:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-31 22:14:45,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:45,389 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:45,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:45,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:45,597 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:45,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:45,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1274296113, now seen corresponding path program 2 times [2024-10-31 22:14:45,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:45,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962208560] [2024-10-31 22:14:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:45,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,875 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 22:14:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 22:14:45,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:45,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962208560] [2024-10-31 22:14:45,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962208560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506991380] [2024-10-31 22:14:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:45,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:45,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:45,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:46,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:14:46,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:46,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-31 22:14:46,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:46,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:14:46,263 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 [2024-10-31 22:14:46,409 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:14:46,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-31 22:14:46,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-10-31 22:14:46,698 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:14:46,698 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 20 treesize of output 19 [2024-10-31 22:14:46,989 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 [2024-10-31 22:14:47,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:47,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:14:47,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506991380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:47,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:47,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 23 [2024-10-31 22:14:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777703062] [2024-10-31 22:14:47,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:47,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:14:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:14:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=514, Unknown=5, NotChecked=0, Total=600 [2024-10-31 22:14:47,231 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 18 states have internal predecessors, (68), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:48,578 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-10-31 22:14:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:14:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 18 states have internal predecessors, (68), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-10-31 22:14:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:48,580 INFO L225 Difference]: With dead ends: 111 [2024-10-31 22:14:48,581 INFO L226 Difference]: Without dead ends: 111 [2024-10-31 22:14:48,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=939, Unknown=5, NotChecked=0, Total=1122 [2024-10-31 22:14:48,582 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 396 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:48,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 625 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 22:14:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-31 22:14:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2024-10-31 22:14:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2024-10-31 22:14:48,593 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 46 [2024-10-31 22:14:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:48,594 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2024-10-31 22:14:48,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 18 states have internal predecessors, (68), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:14:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2024-10-31 22:14:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:14:48,597 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:48,598 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:48,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:48,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:14:48,799 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:48,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2029013930, now seen corresponding path program 1 times [2024-10-31 22:14:48,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:48,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208837191] [2024-10-31 22:14:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 22:14:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:14:50,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:50,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208837191] [2024-10-31 22:14:50,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208837191] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329336456] [2024-10-31 22:14:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:50,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:50,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:50,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:14:50,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:50,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:14:50,267 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 [2024-10-31 22:14:50,288 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-10-31 22:14:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:50,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:50,387 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 [2024-10-31 22:14:50,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:50,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:50,560 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 [2024-10-31 22:14:50,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:50,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-31 22:14:50,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:50,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329336456] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:50,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2024-10-31 22:14:50,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874865622] [2024-10-31 22:14:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:50,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:14:50,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:14:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2024-10-31 22:14:50,646 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:50,797 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2024-10-31 22:14:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2024-10-31 22:14:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:50,799 INFO L225 Difference]: With dead ends: 96 [2024-10-31 22:14:50,799 INFO L226 Difference]: Without dead ends: 96 [2024-10-31 22:14:50,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-10-31 22:14:50,800 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:50,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 232 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2024-10-31 22:14:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-31 22:14:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-10-31 22:14:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.523076923076923) internal successors, (99), 91 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2024-10-31 22:14:50,804 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 47 [2024-10-31 22:14:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:50,804 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2024-10-31 22:14:50,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:14:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2024-10-31 22:14:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:14:50,805 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:50,806 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:50,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:14:51,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:14:51,010 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:51,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1423390737, now seen corresponding path program 1 times [2024-10-31 22:14:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:51,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637466622] [2024-10-31 22:14:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,527 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 22:14:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:14:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637466622] [2024-10-31 22:14:51,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637466622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256571238] [2024-10-31 22:14:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:51,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:51,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:51,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:14:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 22:14:51,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:51,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:14:52,207 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 [2024-10-31 22:14:52,240 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-10-31 22:14:52,274 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-31 22:14:52,274 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 [2024-10-31 22:14:52,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-31 22:14:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 7 not checked. [2024-10-31 22:14:52,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:52,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2024-10-31 22:14:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:52,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256571238] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:52,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:52,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 22 [2024-10-31 22:14:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571372598] [2024-10-31 22:14:52,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:52,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:14:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:14:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=405, Unknown=1, NotChecked=40, Total=506 [2024-10-31 22:14:52,621 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 19 states have internal predecessors, (80), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 22:14:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:53,559 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-10-31 22:14:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:14:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 19 states have internal predecessors, (80), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2024-10-31 22:14:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:53,564 INFO L225 Difference]: With dead ends: 95 [2024-10-31 22:14:53,564 INFO L226 Difference]: Without dead ends: 95 [2024-10-31 22:14:53,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=717, Unknown=1, NotChecked=54, Total=870 [2024-10-31 22:14:53,566 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 74 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:53,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 712 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 856 Invalid, 0 Unknown, 96 Unchecked, 0.8s Time] [2024-10-31 22:14:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-31 22:14:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-10-31 22:14:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 66 states have (on average 1.5) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-10-31 22:14:53,571 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 51 [2024-10-31 22:14:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:53,572 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-10-31 22:14:53,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 19 states have internal predecessors, (80), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-31 22:14:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-10-31 22:14:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:14:53,574 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:53,574 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:53,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:14:53,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:14:53,776 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:53,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1423390736, now seen corresponding path program 1 times [2024-10-31 22:14:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:53,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998549969] [2024-10-31 22:14:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:53,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 22:14:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:14:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998549969] [2024-10-31 22:14:54,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998549969] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:54,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822357056] [2024-10-31 22:14:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:54,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:54,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:54,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:14:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-31 22:14:55,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:55,380 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 9 treesize of output 3 [2024-10-31 22:14:55,571 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-31 22:14:55,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-10-31 22:14:55,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-31 22:14:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:55,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:56,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822357056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:56,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:56,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2024-10-31 22:14:56,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655262344] [2024-10-31 22:14:56,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:56,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 22:14:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 22:14:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-10-31 22:14:56,116 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 28 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 22:14:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:14:57,569 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2024-10-31 22:14:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 22:14:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2024-10-31 22:14:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:14:57,571 INFO L225 Difference]: With dead ends: 109 [2024-10-31 22:14:57,571 INFO L226 Difference]: Without dead ends: 109 [2024-10-31 22:14:57,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=1892, Unknown=0, NotChecked=0, Total=2070 [2024-10-31 22:14:57,574 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 85 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:14:57,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 965 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 22:14:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-31 22:14:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2024-10-31 22:14:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 100 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:14:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2024-10-31 22:14:57,579 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 51 [2024-10-31 22:14:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:14:57,581 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2024-10-31 22:14:57,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 22:14:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2024-10-31 22:14:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 22:14:57,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:14:57,584 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:57,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:14:57,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:14:57,785 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:14:57,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1423543604, now seen corresponding path program 1 times [2024-10-31 22:14:57,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:57,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438287357] [2024-10-31 22:14:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,159 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:14:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:14:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 22:14:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:14:58,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:58,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438287357] [2024-10-31 22:14:58,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438287357] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459721816] [2024-10-31 22:14:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:58,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:58,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:58,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:58,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:14:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 22:14:58,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:58,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:14:58,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:14:58,591 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 [2024-10-31 22:14:58,596 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 [2024-10-31 22:14:58,758 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-31 22:14:58,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-31 22:14:58,795 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:14:58,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:14:58,987 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 [2024-10-31 22:14:59,048 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-10-31 22:14:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:59,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:59,192 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 [2024-10-31 22:14:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:14:59,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:14:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 14 not checked. [2024-10-31 22:14:59,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:59,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459721816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:59,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:14:59,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2024-10-31 22:14:59,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524940548] [2024-10-31 22:14:59,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:59,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:14:59,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:14:59,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=366, Unknown=1, NotChecked=38, Total=462 [2024-10-31 22:14:59,479 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 15 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 22:15:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:00,286 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2024-10-31 22:15:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:15:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 15 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2024-10-31 22:15:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:00,288 INFO L225 Difference]: With dead ends: 103 [2024-10-31 22:15:00,289 INFO L226 Difference]: Without dead ends: 103 [2024-10-31 22:15:00,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=855, Unknown=1, NotChecked=60, Total=1056 [2024-10-31 22:15:00,290 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 58 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:00,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 656 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 821 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2024-10-31 22:15:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-10-31 22:15:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-10-31 22:15:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4) internal successors, (105), 97 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:15:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2024-10-31 22:15:00,295 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 51 [2024-10-31 22:15:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:00,296 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2024-10-31 22:15:00,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 15 states have internal predecessors, (71), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-31 22:15:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2024-10-31 22:15:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 22:15:00,298 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:00,298 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:00,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:00,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88c34d8a-88a1-494b-8c54-f25eaac71a5d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:15:00,502 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:15:00,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash -21300460, now seen corresponding path program 1 times [2024-10-31 22:15:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928075615] [2024-10-31 22:15:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,658 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-31 22:15:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-31 22:15:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-31 22:15:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-31 22:15:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928075615] [2024-10-31 22:15:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928075615] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:00,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:00,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:15:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814127401] [2024-10-31 22:15:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:00,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:15:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:15:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:00,723 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:15:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:15:00,913 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2024-10-31 22:15:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:15:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-10-31 22:15:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:15:00,915 INFO L225 Difference]: With dead ends: 102 [2024-10-31 22:15:00,915 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 22:15:00,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:00,915 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:15:00,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 301 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:15:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 22:15:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-10-31 22:15:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:15:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2024-10-31 22:15:00,920 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 54 [2024-10-31 22:15:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:15:00,920 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2024-10-31 22:15:00,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:15:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2024-10-31 22:15:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-31 22:15:00,921 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:15:00,922 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:00,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:15:00,922 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:15:00,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash -21300459, now seen corresponding path program 1 times [2024-10-31 22:15:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:00,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625787483] [2024-10-31 22:15:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat