./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/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_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:13:12,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:13:12,328 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2024-10-31 22:13:12,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:13:12,333 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:13:12,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:13:12,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:13:12,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:13:12,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:13:12,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:13:12,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:13:12,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:13:12,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:13:12,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:13:12,376 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:13:12,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:13:12,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:13:12,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:13:12,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:13:12,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:13:12,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:13:12,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:13:12,385 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:13:12,385 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:13:12,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:13:12,386 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:13:12,386 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:13:12,386 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:13:12,386 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:13:12,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:13:12,387 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:13:12,387 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:13:12,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:13:12,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:13:12,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:13:12,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:13:12,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:12,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:13:12,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:13:12,391 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:13:12,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:13:12,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:13:12,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:13:12,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:13:12,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:13:12,393 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_24e89639-342e-4e56-86d2-041d2d82db2c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2024-10-31 22:13:12,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:13:12,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:13:12,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:13:12,771 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:13:12,771 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:13:12,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i Unable to find full path for "g++" [2024-10-31 22:13:14,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:13:15,094 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:13:15,095 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2024-10-31 22:13:15,123 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/data/c29450002/00128e43d59e42e6851c1a1241db62df/FLAGa64b0a935 [2024-10-31 22:13:15,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/data/c29450002/00128e43d59e42e6851c1a1241db62df [2024-10-31 22:13:15,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:13:15,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:13:15,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:15,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:13:15,359 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:13:15,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:15,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7369cce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15, skipping insertion in model container [2024-10-31 22:13:15,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:15,407 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:13:15,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:15,881 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:13:15,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:15,992 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:13:15,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15 WrapperNode [2024-10-31 22:13:15,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:15,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:15,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:13:15,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:13:16,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,059 INFO L138 Inliner]: procedures = 129, calls = 80, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 210 [2024-10-31 22:13:16,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:16,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:16,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:16,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:16,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,077 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,111 INFO L175 MemorySlicer]: Split 42 memory accesses to 5 slices as follows [2, 8, 18, 6, 8]. 43 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 0, 1, 0]. The 10 writes are split as follows [0, 1, 7, 1, 1]. [2024-10-31 22:13:16,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,139 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,153 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:16,154 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:16,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:16,156 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:16,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (1/1) ... [2024-10-31 22:13:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:16,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-10-31 22:13:16,240 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-10-31 22:13:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:13:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-31 22:13:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2024-10-31 22:13:16,242 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2024-10-31 22:13:16,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-10-31 22:13:16,243 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2024-10-31 22:13:16,244 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2024-10-31 22:13:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:13:16,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:13:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:13:16,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-31 22:13:16,248 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2024-10-31 22:13:16,248 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2024-10-31 22:13:16,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:16,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:16,495 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:16,499 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:13:16,948 INFO L? ?]: Removed 50 outVars from TransFormulas that were not future-live. [2024-10-31 22:13:16,949 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:13:16,969 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:13:16,969 INFO L316 CfgBuilder]: Removed 33 assume(true) statements. [2024-10-31 22:13:16,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:16 BoogieIcfgContainer [2024-10-31 22:13:16,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:13:16,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:13:16,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:13:16,976 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:13:16,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:13:15" (1/3) ... [2024-10-31 22:13:16,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a0944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:16, skipping insertion in model container [2024-10-31 22:13:16,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:15" (2/3) ... [2024-10-31 22:13:16,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a0944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:16, skipping insertion in model container [2024-10-31 22:13:16,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:16" (3/3) ... [2024-10-31 22:13:16,981 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2024-10-31 22:13:17,004 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:13:17,004 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-31 22:13:17,070 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:13:17,079 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;@7455e127, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:13:17,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-31 22:13:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 87 states have internal predecessors, (130), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-10-31 22:13:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:13:17,096 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:13:17,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:17,098 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-10-31 22:13:17,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash 479704127, now seen corresponding path program 1 times [2024-10-31 22:13:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970089561] [2024-10-31 22:13:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:17,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970089561] [2024-10-31 22:13:17,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970089561] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:17,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:17,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287352741] [2024-10-31 22:13:17,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:17,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:13:17,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:13:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:13:17,436 INFO L87 Difference]: Start difference. First operand has 100 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 87 states have internal predecessors, (130), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:13:17,470 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2024-10-31 22:13:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:13:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-31 22:13:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:13:17,482 INFO L225 Difference]: With dead ends: 97 [2024-10-31 22:13:17,483 INFO L226 Difference]: Without dead ends: 95 [2024-10-31 22:13:17,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:13:17,488 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:13:17,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:13:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-31 22:13:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-10-31 22:13:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 82 states have internal predecessors, (90), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:13:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2024-10-31 22:13:17,555 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 18 [2024-10-31 22:13:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:13:17,555 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2024-10-31 22:13:17,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2024-10-31 22:13:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:13:17,558 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:13:17,558 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:17,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:13:17,558 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-10-31 22:13:17,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1855159230, now seen corresponding path program 1 times [2024-10-31 22:13:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802117288] [2024-10-31 22:13:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:13:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-31 22:13:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802117288] [2024-10-31 22:13:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802117288] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:19,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80517317] [2024-10-31 22:13:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:19,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:19,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:19,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:13:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 22:13:19,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:19,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:13:19,604 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 24 treesize of output 16 [2024-10-31 22:13:19,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-31 22:13:19,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-31 22:13:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:19,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:19,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-10-31 22:13:19,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-10-31 22:13:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80517317] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:19,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:19,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 13 [2024-10-31 22:13:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696745449] [2024-10-31 22:13:19,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:19,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:13:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:13:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:13:19,983 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:13:24,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:28,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:32,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:36,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:40,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:44,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:48,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:13:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:13:49,567 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2024-10-31 22:13:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:13:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-31 22:13:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:13:49,575 INFO L225 Difference]: With dead ends: 120 [2024-10-31 22:13:49,576 INFO L226 Difference]: Without dead ends: 120 [2024-10-31 22:13:49,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:13:49,578 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 189 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 43 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:13:49,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 478 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 666 Invalid, 7 Unknown, 0 Unchecked, 29.1s Time] [2024-10-31 22:13:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-31 22:13:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2024-10-31 22:13:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 98 states have internal predecessors, (109), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:13:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2024-10-31 22:13:49,605 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 35 [2024-10-31 22:13:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:13:49,605 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2024-10-31 22:13:49,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:13:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2024-10-31 22:13:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:13:49,610 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:13:49,610 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:49,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:13:49,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:49,812 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-10-31 22:13:49,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1766628120, now seen corresponding path program 1 times [2024-10-31 22:13:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:49,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915020065] [2024-10-31 22:13:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:50,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:13:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:50,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-31 22:13:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915020065] [2024-10-31 22:13:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915020065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632013625] [2024-10-31 22:13:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:50,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:50,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:50,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e89639-342e-4e56-86d2-041d2d82db2c/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:13:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:50,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-31 22:13:50,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:50,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:13:50,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 22:13:51,083 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 27 treesize of output 19 [2024-10-31 22:13:51,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 22:13:51,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-31 22:13:51,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:13:51,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:13:51,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:13:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:51,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:51,833 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 32 treesize of output 28 [2024-10-31 22:13:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:13:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:13:51,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2024-10-31 22:13:51,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-10-31 22:13:52,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-10-31 22:13:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:52,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632013625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:52,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:52,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 28 [2024-10-31 22:13:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949653717] [2024-10-31 22:13:52,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:52,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 22:13:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 22:13:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:13:52,131 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 28 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 9 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)