./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/dll-backwards.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-backwards.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB --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 64bit --witnessprinter.graph.data.programhash c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:28:21,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:28:21,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-27 23:28:21,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:28:21,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:28:21,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:28:21,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:28:21,900 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:28:21,901 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:28:21,901 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:28:21,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:28:21,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:28:21,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:28:21,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:28:21,904 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:28:21,905 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:28:21,905 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:28:21,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:28:21,906 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:28:21,907 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:28:21,907 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:28:21,907 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:28:21,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:28:21,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:28:21,907 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:28:21,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:21,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:28:21,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:28:21,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:28:21,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:21,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:28:21,910 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:28:21,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:28:21,911 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 [2024-11-27 23:28:22,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:28:22,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:28:22,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:28:22,326 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:28:22,326 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:28:22,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-11-27 23:28:25,957 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/663b99891/62e63a6147ee4926bf9d3d64b5b4b91b/FLAG4cc9b29ab [2024-11-27 23:28:26,298 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:28:26,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-11-27 23:28:26,330 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/663b99891/62e63a6147ee4926bf9d3d64b5b4b91b/FLAG4cc9b29ab [2024-11-27 23:28:26,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/663b99891/62e63a6147ee4926bf9d3d64b5b4b91b [2024-11-27 23:28:26,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:28:26,355 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:28:26,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:28:26,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:28:26,362 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:28:26,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba0246c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26, skipping insertion in model container [2024-11-27 23:28:26,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,431 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:28:26,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:28:26,831 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:28:26,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:28:26,929 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:28:26,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26 WrapperNode [2024-11-27 23:28:26,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:28:26,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:28:26,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:28:26,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:28:26,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,973 INFO L138 Inliner]: procedures = 119, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2024-11-27 23:28:26,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:28:26,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:28:26,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:28:26,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:28:26,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:26,990 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,008 INFO L175 MemorySlicer]: Split 9 memory accesses to 1 slices as follows [9]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-11-27 23:28:27,008 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,008 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,016 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,025 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:28:27,026 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:28:27,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:28:27,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:28:27,027 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (1/1) ... [2024-11-27 23:28:27,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:28:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:27,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:28:27,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:28:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-27 23:28:27,098 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-27 23:28:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:28:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 23:28:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 23:28:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:28:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:28:27,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:28:27,213 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:28:27,215 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:28:27,532 INFO L? ?]: Removed 75 outVars from TransFormulas that were not future-live. [2024-11-27 23:28:27,532 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:28:27,546 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:28:27,546 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:28:27,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:28:27 BoogieIcfgContainer [2024-11-27 23:28:27,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:28:27,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:28:27,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:28:27,558 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:28:27,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:28:26" (1/3) ... [2024-11-27 23:28:27,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b71709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:28:27, skipping insertion in model container [2024-11-27 23:28:27,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:28:26" (2/3) ... [2024-11-27 23:28:27,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b71709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:28:27, skipping insertion in model container [2024-11-27 23:28:27,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:28:27" (3/3) ... [2024-11-27 23:28:27,562 INFO L128 eAbstractionObserver]: Analyzing ICFG dll-backwards.i [2024-11-27 23:28:27,577 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:28:27,579 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll-backwards.i that has 2 procedures, 64 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-11-27 23:28:27,626 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:28:27,641 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;@784a3c24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:28:27,642 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-27 23:28:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-11-27 23:28:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-27 23:28:27,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:27,652 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 23:28:27,653 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:27,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:27,657 INFO L85 PathProgramCache]: Analyzing trace with hash 37374253, now seen corresponding path program 1 times [2024-11-27 23:28:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:27,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201035331] [2024-11-27 23:28:27,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:27,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201035331] [2024-11-27 23:28:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201035331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:27,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:27,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:28:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166305996] [2024-11-27 23:28:27,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:27,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:28:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:27,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:28:27,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:28:27,985 INFO L87 Difference]: Start difference. First operand has 64 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 60 states have internal predecessors, (68), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:28,097 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2024-11-27 23:28:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:28:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-27 23:28:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:28,107 INFO L225 Difference]: With dead ends: 62 [2024-11-27 23:28:28,107 INFO L226 Difference]: Without dead ends: 60 [2024-11-27 23:28:28,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:28:28,112 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:28,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 101 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-27 23:28:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-27 23:28:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 56 states have internal predecessors, (60), 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) [2024-11-27 23:28:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-27 23:28:28,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 5 [2024-11-27 23:28:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:28,152 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-27 23:28:28,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-27 23:28:28,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-27 23:28:28,152 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:28,152 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 23:28:28,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:28:28,153 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:28,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 37374254, now seen corresponding path program 1 times [2024-11-27 23:28:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:28,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41353981] [2024-11-27 23:28:28,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:28,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:28,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41353981] [2024-11-27 23:28:28,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41353981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:28,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:28,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:28:28,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726993951] [2024-11-27 23:28:28,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:28,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:28:28,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:28,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:28:28,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:28:28,318 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:28,389 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2024-11-27 23:28:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:28:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-27 23:28:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:28,390 INFO L225 Difference]: With dead ends: 58 [2024-11-27 23:28:28,390 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 23:28:28,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:28:28,392 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:28,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 23:28:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 23:28:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 54 states have internal predecessors, (58), 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) [2024-11-27 23:28:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-27 23:28:28,405 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 5 [2024-11-27 23:28:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:28,406 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-27 23:28:28,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:28:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-27 23:28:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 23:28:28,409 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:28,409 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:28,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:28:28,409 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:28,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash -183705932, now seen corresponding path program 1 times [2024-11-27 23:28:28,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:28,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248453383] [2024-11-27 23:28:28,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:28,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248453383] [2024-11-27 23:28:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248453383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:28,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:28,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:28:28,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885505951] [2024-11-27 23:28:28,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:28,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:28:28,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:28,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:28:28,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:28,714 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:28,969 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-27 23:28:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:28:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 15 [2024-11-27 23:28:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:28,972 INFO L225 Difference]: With dead ends: 64 [2024-11-27 23:28:28,972 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 23:28:28,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:28,973 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:28,974 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 233 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 23:28:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-11-27 23:28:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 59 states have internal predecessors, (65), 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) [2024-11-27 23:28:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-11-27 23:28:28,981 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 15 [2024-11-27 23:28:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:28,982 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-11-27 23:28:28,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-11-27 23:28:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 23:28:28,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:28,983 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:28,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:28:28,983 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:28,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash -183705931, now seen corresponding path program 1 times [2024-11-27 23:28:28,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:28,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655377469] [2024-11-27 23:28:28,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:29,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655377469] [2024-11-27 23:28:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655377469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:28:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748508649] [2024-11-27 23:28:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:29,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:28:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:29,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:28:29,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:29,407 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:29,618 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-11-27 23:28:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:28:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 15 [2024-11-27 23:28:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:29,620 INFO L225 Difference]: With dead ends: 68 [2024-11-27 23:28:29,623 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 23:28:29,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:29,624 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:29,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 269 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:29,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 23:28:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-11-27 23:28:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 59 states have internal predecessors, (64), 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) [2024-11-27 23:28:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-27 23:28:29,635 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 15 [2024-11-27 23:28:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:29,636 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-27 23:28:29,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-27 23:28:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:28:29,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:29,638 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:29,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:28:29,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:29,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1866185865, now seen corresponding path program 1 times [2024-11-27 23:28:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877479630] [2024-11-27 23:28:29,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877479630] [2024-11-27 23:28:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877479630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593566596] [2024-11-27 23:28:30,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:30,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:30,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:28:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:30,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:28:30,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:30,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:30,291 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2024-11-27 23:28:30,405 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-27 23:28:30,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-27 23:28:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-27 23:28:30,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593566596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:30,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:30,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2024-11-27 23:28:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690975998] [2024-11-27 23:28:30,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:30,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:28:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:30,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:28:30,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-27 23:28:30,520 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:30,792 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-11-27 23:28:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:28:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-27 23:28:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:30,794 INFO L225 Difference]: With dead ends: 63 [2024-11-27 23:28:30,795 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 23:28:30,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-27 23:28:30,796 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:30,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 228 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2024-11-27 23:28:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 23:28:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 23:28:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-27 23:28:30,805 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 20 [2024-11-27 23:28:30,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:30,805 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-27 23:28:30,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-27 23:28:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:28:30,806 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:30,806 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:30,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:28:31,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:31,011 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:31,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1866185864, now seen corresponding path program 1 times [2024-11-27 23:28:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:31,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196567429] [2024-11-27 23:28:31,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:31,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:31,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196567429] [2024-11-27 23:28:31,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196567429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121705196] [2024-11-27 23:28:31,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:31,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:31,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:28:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:31,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:28:31,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:31,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:31,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:28:31,808 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-27 23:28:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:28:31,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:28:31,892 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:31,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-27 23:28:31,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121705196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:32,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:32,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2024-11-27 23:28:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331040052] [2024-11-27 23:28:32,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:32,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:28:32,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:32,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:28:32,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=127, Unknown=1, NotChecked=22, Total=182 [2024-11-27 23:28:32,064 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:32,399 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-11-27 23:28:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:28:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-27 23:28:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:32,401 INFO L225 Difference]: With dead ends: 70 [2024-11-27 23:28:32,401 INFO L226 Difference]: Without dead ends: 70 [2024-11-27 23:28:32,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=171, Unknown=1, NotChecked=26, Total=240 [2024-11-27 23:28:32,402 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:32,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 273 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2024-11-27 23:28:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-27 23:28:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-27 23:28:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-27 23:28:32,412 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 20 [2024-11-27 23:28:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:32,412 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-27 23:28:32,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-27 23:28:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-27 23:28:32,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:32,413 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:32,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:32,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:32,621 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:32,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash -782186931, now seen corresponding path program 1 times [2024-11-27 23:28:32,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:32,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318409779] [2024-11-27 23:28:32,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318409779] [2024-11-27 23:28:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318409779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:32,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:28:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954217742] [2024-11-27 23:28:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:32,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:28:32,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:32,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:28:32,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:32,997 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:33,177 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2024-11-27 23:28:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-27 23:28:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:33,178 INFO L225 Difference]: With dead ends: 71 [2024-11-27 23:28:33,179 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 23:28:33,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:28:33,179 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:33,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 387 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 23:28:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-27 23:28:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.44) internal successors, (72), 65 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2024-11-27 23:28:33,185 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 19 [2024-11-27 23:28:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:33,185 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2024-11-27 23:28:33,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2024-11-27 23:28:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:28:33,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:33,186 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:33,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-27 23:28:33,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:33,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:33,187 INFO L85 PathProgramCache]: Analyzing trace with hash -60380993, now seen corresponding path program 1 times [2024-11-27 23:28:33,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:33,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157412727] [2024-11-27 23:28:33,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:33,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:33,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157412727] [2024-11-27 23:28:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157412727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:33,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:33,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:28:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936198006] [2024-11-27 23:28:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:33,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:28:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:33,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:28:33,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:33,392 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:33,620 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-27 23:28:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 21 [2024-11-27 23:28:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:33,622 INFO L225 Difference]: With dead ends: 72 [2024-11-27 23:28:33,622 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 23:28:33,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:33,623 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:33,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 263 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 23:28:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 23:28:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 67 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-11-27 23:28:33,629 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 21 [2024-11-27 23:28:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:33,629 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-11-27 23:28:33,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-11-27 23:28:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:28:33,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:33,630 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:33,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 23:28:33,631 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:33,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -60380992, now seen corresponding path program 1 times [2024-11-27 23:28:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:33,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036440975] [2024-11-27 23:28:33,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:33,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036440975] [2024-11-27 23:28:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036440975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:33,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:33,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:28:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646601921] [2024-11-27 23:28:33,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:33,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:28:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:33,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:28:33,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:33,976 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:34,231 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2024-11-27 23:28:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 21 [2024-11-27 23:28:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:34,233 INFO L225 Difference]: With dead ends: 76 [2024-11-27 23:28:34,233 INFO L226 Difference]: Without dead ends: 76 [2024-11-27 23:28:34,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:34,234 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:34,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 295 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-27 23:28:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-27 23:28:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-27 23:28:34,240 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2024-11-27 23:28:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:34,240 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-27 23:28:34,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-27 23:28:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:28:34,242 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:34,242 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:34,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 23:28:34,242 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:34,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1486426742, now seen corresponding path program 1 times [2024-11-27 23:28:34,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304106135] [2024-11-27 23:28:34,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:28:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304106135] [2024-11-27 23:28:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304106135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:28:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117130750] [2024-11-27 23:28:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:34,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:28:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:34,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:28:34,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:28:34,395 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:34,532 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-27 23:28:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:28:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-27 23:28:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:34,533 INFO L225 Difference]: With dead ends: 75 [2024-11-27 23:28:34,533 INFO L226 Difference]: Without dead ends: 75 [2024-11-27 23:28:34,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:34,534 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:34,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 206 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-27 23:28:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-27 23:28:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 70 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-11-27 23:28:34,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 23 [2024-11-27 23:28:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:34,540 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-11-27 23:28:34,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-11-27 23:28:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:28:34,541 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:34,541 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:34,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 23:28:34,542 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:34,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1486426741, now seen corresponding path program 1 times [2024-11-27 23:28:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:34,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332300558] [2024-11-27 23:28:34,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:34,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332300558] [2024-11-27 23:28:34,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332300558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:34,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:34,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:28:34,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579801059] [2024-11-27 23:28:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:34,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:28:34,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:34,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:28:34,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:28:34,841 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:34,984 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2024-11-27 23:28:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:28:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2024-11-27 23:28:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:34,985 INFO L225 Difference]: With dead ends: 74 [2024-11-27 23:28:34,985 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 23:28:34,986 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:28:34,986 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:34,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 231 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 23:28:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-27 23:28:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.375) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2024-11-27 23:28:34,992 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 23 [2024-11-27 23:28:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:34,992 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2024-11-27 23:28:34,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2024-11-27 23:28:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:28:34,994 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:34,994 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:34,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 23:28:34,994 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:34,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2103476040, now seen corresponding path program 1 times [2024-11-27 23:28:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457322041] [2024-11-27 23:28:34,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:35,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:35,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457322041] [2024-11-27 23:28:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457322041] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:35,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:28:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687092895] [2024-11-27 23:28:35,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:35,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:28:35,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:35,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:28:35,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:35,159 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:35,271 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2024-11-27 23:28:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:28:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 23 [2024-11-27 23:28:35,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:35,273 INFO L225 Difference]: With dead ends: 82 [2024-11-27 23:28:35,273 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 23:28:35,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:28:35,274 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:35,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 378 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 23:28:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-27 23:28:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2024-11-27 23:28:35,279 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 23 [2024-11-27 23:28:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:35,280 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2024-11-27 23:28:35,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2024-11-27 23:28:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 23:28:35,281 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:35,281 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:35,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 23:28:35,281 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:35,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash 781182005, now seen corresponding path program 1 times [2024-11-27 23:28:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:35,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882590402] [2024-11-27 23:28:35,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:35,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882590402] [2024-11-27 23:28:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882590402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736732098] [2024-11-27 23:28:35,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:35,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:35,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:35,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:35,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:28:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:35,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-27 23:28:35,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:35,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:28:35,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-27 23:28:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:36,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:36,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736732098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:36,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:36,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2024-11-27 23:28:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735247265] [2024-11-27 23:28:36,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:36,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:28:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:36,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:28:36,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:28:36,517 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:36,841 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2024-11-27 23:28:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:28:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-27 23:28:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:36,842 INFO L225 Difference]: With dead ends: 82 [2024-11-27 23:28:36,842 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 23:28:36,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:28:36,843 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:36,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 638 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:28:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 23:28:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-27 23:28:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.359375) internal successors, (87), 77 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2024-11-27 23:28:36,848 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 24 [2024-11-27 23:28:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:36,848 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2024-11-27 23:28:36,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2024-11-27 23:28:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:28:36,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:36,849 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:36,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:28:37,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:28:37,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:37,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -903301826, now seen corresponding path program 1 times [2024-11-27 23:28:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335969380] [2024-11-27 23:28:37,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:37,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335969380] [2024-11-27 23:28:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335969380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:28:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454367589] [2024-11-27 23:28:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:37,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:28:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:37,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:28:37,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:37,224 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:37,443 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2024-11-27 23:28:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 26 [2024-11-27 23:28:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:37,444 INFO L225 Difference]: With dead ends: 83 [2024-11-27 23:28:37,444 INFO L226 Difference]: Without dead ends: 83 [2024-11-27 23:28:37,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:37,445 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:37,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 240 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-27 23:28:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-27 23:28:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 78 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2024-11-27 23:28:37,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2024-11-27 23:28:37,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:37,450 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2024-11-27 23:28:37,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:37,450 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2024-11-27 23:28:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:28:37,451 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:37,451 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:37,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 23:28:37,451 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:37,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -903301825, now seen corresponding path program 1 times [2024-11-27 23:28:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:37,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147284365] [2024-11-27 23:28:37,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:37,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147284365] [2024-11-27 23:28:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147284365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:28:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462900417] [2024-11-27 23:28:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:37,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:28:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:37,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:28:37,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:37,758 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:38,015 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2024-11-27 23:28:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 26 [2024-11-27 23:28:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:38,016 INFO L225 Difference]: With dead ends: 88 [2024-11-27 23:28:38,016 INFO L226 Difference]: Without dead ends: 88 [2024-11-27 23:28:38,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:38,017 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:38,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 281 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-27 23:28:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-27 23:28:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.352112676056338) internal successors, (96), 83 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2024-11-27 23:28:38,022 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 26 [2024-11-27 23:28:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:38,022 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2024-11-27 23:28:38,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2024-11-27 23:28:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:28:38,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:38,023 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:38,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 23:28:38,027 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:38,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2062416867, now seen corresponding path program 1 times [2024-11-27 23:28:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850527972] [2024-11-27 23:28:38,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850527972] [2024-11-27 23:28:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850527972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:38,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:28:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480905162] [2024-11-27 23:28:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:38,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:28:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:38,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:28:38,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:38,188 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:38,322 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2024-11-27 23:28:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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 27 [2024-11-27 23:28:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:38,325 INFO L225 Difference]: With dead ends: 103 [2024-11-27 23:28:38,325 INFO L226 Difference]: Without dead ends: 103 [2024-11-27 23:28:38,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:38,326 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:38,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 382 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-27 23:28:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2024-11-27 23:28:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-11-27 23:28:38,335 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 27 [2024-11-27 23:28:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:38,335 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-11-27 23:28:38,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-11-27 23:28:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 23:28:38,339 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:38,340 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:38,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 23:28:38,340 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:38,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2000442979, now seen corresponding path program 1 times [2024-11-27 23:28:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:38,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926182235] [2024-11-27 23:28:38,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:38,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:38,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926182235] [2024-11-27 23:28:38,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926182235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:28:38,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:28:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:28:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702773794] [2024-11-27 23:28:38,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:28:38,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:28:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:38,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:28:38,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:38,564 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:38,751 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2024-11-27 23:28:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 29 [2024-11-27 23:28:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:38,753 INFO L225 Difference]: With dead ends: 102 [2024-11-27 23:28:38,753 INFO L226 Difference]: Without dead ends: 102 [2024-11-27 23:28:38,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:28:38,754 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:38,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 340 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-27 23:28:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-27 23:28:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 93 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2024-11-27 23:28:38,759 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 29 [2024-11-27 23:28:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:38,759 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2024-11-27 23:28:38,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2024-11-27 23:28:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:28:38,763 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:38,765 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 23:28:38,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 23:28:38,765 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:38,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2088370990, now seen corresponding path program 1 times [2024-11-27 23:28:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706503374] [2024-11-27 23:28:38,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:28:38,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:38,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706503374] [2024-11-27 23:28:38,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706503374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:38,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831620367] [2024-11-27 23:28:38,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:38,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:38,902 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:38,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:28:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:39,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:28:39,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:28:39,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:39,098 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 23:28:39,098 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 12 treesize of output 11 [2024-11-27 23:28:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:28:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831620367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:39,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-11-27 23:28:39,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868419852] [2024-11-27 23:28:39,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:39,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:28:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:39,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:28:39,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:28:39,122 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-11-27 23:28:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:39,233 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2024-11-27 23:28:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:28:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 31 [2024-11-27 23:28:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:39,236 INFO L225 Difference]: With dead ends: 105 [2024-11-27 23:28:39,236 INFO L226 Difference]: Without dead ends: 105 [2024-11-27 23:28:39,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:28:39,237 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:39,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 206 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:28:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-27 23:28:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-11-27 23:28:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.367816091954023) internal successors, (119), 99 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-11-27 23:28:39,243 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 31 [2024-11-27 23:28:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:39,243 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-11-27 23:28:39,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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) [2024-11-27 23:28:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-11-27 23:28:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:28:39,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:39,244 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 23:28:39,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:28:39,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:28:39,445 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:39,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:39,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2088370991, now seen corresponding path program 1 times [2024-11-27 23:28:39,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:39,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066234693] [2024-11-27 23:28:39,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:39,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:39,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066234693] [2024-11-27 23:28:39,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066234693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:39,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868470207] [2024-11-27 23:28:39,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:39,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:39,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:39,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:28:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:39,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:28:39,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:28:40,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:40,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:40,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2024-11-27 23:28:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:28:40,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868470207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:40,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:40,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-11-27 23:28:40,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673025177] [2024-11-27 23:28:40,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:40,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:28:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:40,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:28:40,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:28:40,187 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:28:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:40,390 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2024-11-27 23:28:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-11-27 23:28:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:40,391 INFO L225 Difference]: With dead ends: 109 [2024-11-27 23:28:40,392 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 23:28:40,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:28:40,392 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:40,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 482 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:28:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 23:28:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2024-11-27 23:28:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 99 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-11-27 23:28:40,397 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 31 [2024-11-27 23:28:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:40,398 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-11-27 23:28:40,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:28:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-11-27 23:28:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-27 23:28:40,400 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:40,400 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:40,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:40,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:40,605 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:40,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:40,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1769282234, now seen corresponding path program 1 times [2024-11-27 23:28:40,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:40,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994071161] [2024-11-27 23:28:40,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:40,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994071161] [2024-11-27 23:28:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994071161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10960500] [2024-11-27 23:28:41,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:41,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:41,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:41,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:41,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:28:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:41,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-27 23:28:41,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:41,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:28:41,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:28:41,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:41,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-27 23:28:41,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:41,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-27 23:28:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:41,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:42,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2024-11-27 23:28:42,216 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 14 treesize of output 12 [2024-11-27 23:28:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:42,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10960500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:42,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:42,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2024-11-27 23:28:42,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262673947] [2024-11-27 23:28:42,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:42,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 23:28:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:42,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 23:28:42,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2024-11-27 23:28:42,224 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:42,714 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-27 23:28:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:28:42,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-27 23:28:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:42,716 INFO L225 Difference]: With dead ends: 107 [2024-11-27 23:28:42,716 INFO L226 Difference]: Without dead ends: 107 [2024-11-27 23:28:42,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-11-27 23:28:42,718 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:42,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 623 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:28:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-27 23:28:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-27 23:28:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 102 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2024-11-27 23:28:42,723 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 32 [2024-11-27 23:28:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:42,723 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2024-11-27 23:28:42,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:28:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2024-11-27 23:28:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 23:28:42,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:42,724 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:42,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:28:42,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:42,929 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:42,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash 986827995, now seen corresponding path program 1 times [2024-11-27 23:28:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:42,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118331161] [2024-11-27 23:28:42,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:42,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118331161] [2024-11-27 23:28:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118331161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:43,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253029751] [2024-11-27 23:28:43,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:43,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:43,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:43,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:28:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:43,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 23:28:43,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:43,389 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 13 treesize of output 9 [2024-11-27 23:28:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:43,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:43,510 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_#t~ret4#1.base_26| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_26|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_create_#t~ret4#1.base_26| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-27 23:28:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253029751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:43,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:43,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2024-11-27 23:28:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733913871] [2024-11-27 23:28:43,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:43,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:28:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:43,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:28:43,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=157, Unknown=1, NotChecked=24, Total=210 [2024-11-27 23:28:43,513 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:43,812 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2024-11-27 23:28:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:28:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 33 [2024-11-27 23:28:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:43,813 INFO L225 Difference]: With dead ends: 109 [2024-11-27 23:28:43,813 INFO L226 Difference]: Without dead ends: 88 [2024-11-27 23:28:43,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=157, Unknown=1, NotChecked=24, Total=210 [2024-11-27 23:28:43,815 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:43,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 344 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:28:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-27 23:28:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-27 23:28:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 83 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-11-27 23:28:43,820 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 33 [2024-11-27 23:28:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:43,820 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-11-27 23:28:43,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:28:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-11-27 23:28:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 23:28:43,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:43,822 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:43,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:44,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 23:28:44,024 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:44,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:44,025 INFO L85 PathProgramCache]: Analyzing trace with hash -467870915, now seen corresponding path program 1 times [2024-11-27 23:28:44,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:44,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297855598] [2024-11-27 23:28:44,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:44,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:28:44,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297855598] [2024-11-27 23:28:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297855598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:44,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156873944] [2024-11-27 23:28:44,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:44,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:44,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:44,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:28:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:44,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 23:28:44,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:44,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:44,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:44,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:44,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:44,979 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:28:44,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-27 23:28:44,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:28:45,019 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base 1))) is different from true [2024-11-27 23:28:45,045 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 23:28:45,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-27 23:28:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 10 not checked. [2024-11-27 23:28:45,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:45,304 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-27 23:28:45,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:28:45,310 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_519 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_519) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) |c_ULTIMATE.start_create_#t~mem7#1.base|)) is different from false [2024-11-27 23:28:45,320 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_519 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_519) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) .cse0))) is different from false [2024-11-27 23:28:45,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:45,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-27 23:28:45,341 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 30 treesize of output 22 [2024-11-27 23:28:45,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:28:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156873944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:45,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 30 [2024-11-27 23:28:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338693290] [2024-11-27 23:28:45,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:45,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:28:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:45,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:28:45,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=679, Unknown=3, NotChecked=162, Total=930 [2024-11-27 23:28:45,484 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-27 23:28:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:45,955 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-11-27 23:28:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:28:45,959 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 36 [2024-11-27 23:28:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:45,960 INFO L225 Difference]: With dead ends: 87 [2024-11-27 23:28:45,960 INFO L226 Difference]: Without dead ends: 87 [2024-11-27 23:28:45,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=936, Unknown=3, NotChecked=192, Total=1260 [2024-11-27 23:28:45,962 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 15 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:45,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 629 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 383 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2024-11-27 23:28:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-27 23:28:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-27 23:28:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.408450704225352) internal successors, (100), 82 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-11-27 23:28:45,971 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 36 [2024-11-27 23:28:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:45,971 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-11-27 23:28:45,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 25 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-27 23:28:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-11-27 23:28:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 23:28:45,972 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:45,972 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:45,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:46,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:46,173 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:46,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -467870914, now seen corresponding path program 1 times [2024-11-27 23:28:46,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:46,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855194125] [2024-11-27 23:28:46,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:46,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855194125] [2024-11-27 23:28:47,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855194125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998518733] [2024-11-27 23:28:47,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:47,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:28:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:47,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-27 23:28:47,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:47,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:47,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 23:28:47,435 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:47,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:47,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:28:47,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:47,622 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:28:47,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-27 23:28:47,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 23:28:47,720 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 18 [2024-11-27 23:28:47,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:28:47,849 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2024-11-27 23:28:47,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:28:47,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:28:47,897 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:47,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2024-11-27 23:28:47,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998518733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:48,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:48,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2024-11-27 23:28:48,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81146714] [2024-11-27 23:28:48,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:48,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 23:28:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:48,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 23:28:48,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=960, Unknown=1, NotChecked=62, Total=1122 [2024-11-27 23:28:48,104 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 23:28:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:48,998 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2024-11-27 23:28:48,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:28:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-11-27 23:28:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:49,000 INFO L225 Difference]: With dead ends: 84 [2024-11-27 23:28:49,000 INFO L226 Difference]: Without dead ends: 84 [2024-11-27 23:28:49,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=1533, Unknown=1, NotChecked=80, Total=1806 [2024-11-27 23:28:49,002 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:49,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 629 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 509 Invalid, 0 Unknown, 58 Unchecked, 0.5s Time] [2024-11-27 23:28:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-27 23:28:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-27 23:28:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-11-27 23:28:49,006 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 36 [2024-11-27 23:28:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:49,006 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-11-27 23:28:49,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 25 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-27 23:28:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-11-27 23:28:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:28:49,007 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:49,007 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:49,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:28:49,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:49,212 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:49,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -598532665, now seen corresponding path program 1 times [2024-11-27 23:28:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351544391] [2024-11-27 23:28:49,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351544391] [2024-11-27 23:28:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351544391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300105868] [2024-11-27 23:28:49,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:49,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:49,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:28:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:49,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-27 23:28:49,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:49,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:50,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:50,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:50,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:50,266 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:28:50,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-27 23:28:50,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:28:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:50,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:50,460 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-11-27 23:28:50,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:28:50,466 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_668 (Array Int Int))) (= |c_ULTIMATE.start_create_#t~mem7#1.base| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_668) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) is different from false [2024-11-27 23:28:50,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:50,541 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-27 23:28:50,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:50,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2024-11-27 23:28:50,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:28:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300105868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:50,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2024-11-27 23:28:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775084979] [2024-11-27 23:28:50,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:50,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:28:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:50,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:28:50,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=4, NotChecked=62, Total=1122 [2024-11-27 23:28:50,660 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:28:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:51,336 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2024-11-27 23:28:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:28:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-11-27 23:28:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:51,337 INFO L225 Difference]: With dead ends: 90 [2024-11-27 23:28:51,337 INFO L226 Difference]: Without dead ends: 90 [2024-11-27 23:28:51,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=4, NotChecked=72, Total=1482 [2024-11-27 23:28:51,339 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 19 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:51,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 687 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:28:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-27 23:28:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-11-27 23:28:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 83 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-27 23:28:51,347 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 35 [2024-11-27 23:28:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:51,347 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-27 23:28:51,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:28:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-27 23:28:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:28:51,348 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:51,348 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:51,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:51,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:51,553 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:51,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash -598532664, now seen corresponding path program 1 times [2024-11-27 23:28:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:51,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388142957] [2024-11-27 23:28:51,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388142957] [2024-11-27 23:28:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388142957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845284694] [2024-11-27 23:28:52,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:52,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:52,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:52,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:52,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:28:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:52,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-27 23:28:52,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:52,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:52,568 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:52,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:52,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:52,767 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:28:52,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2024-11-27 23:28:52,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2024-11-27 23:28:52,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-11-27 23:28:52,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-27 23:28:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:53,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:53,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:53,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2024-11-27 23:28:53,442 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_prenex_4) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) (+ |c_ULTIMATE.start_create_#t~mem7#1.offset| 9))) (forall ((v_ArrVal_729 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_729) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (forall ((v_ArrVal_730 (Array Int Int))) (= |c_ULTIMATE.start_create_#t~mem7#1.base| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_730) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) is different from false [2024-11-27 23:28:53,465 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_730 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_730) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) .cse0)) (forall ((v_prenex_4 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_prenex_4) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|) (+ 9 (select (select |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)))) (forall ((v_ArrVal_729 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_729) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))))) is different from false [2024-11-27 23:28:53,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:53,494 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2024-11-27 23:28:53,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:53,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2024-11-27 23:28:53,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:53,518 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 60 [2024-11-27 23:28:53,525 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 51 treesize of output 49 [2024-11-27 23:28:53,532 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 49 treesize of output 47 [2024-11-27 23:28:53,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:53,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 71 [2024-11-27 23:28:53,559 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 55 treesize of output 53 [2024-11-27 23:28:53,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845284694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:53,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 29 [2024-11-27 23:28:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988693937] [2024-11-27 23:28:53,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:53,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 23:28:53,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:53,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 23:28:53,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1234, Unknown=2, NotChecked=142, Total=1482 [2024-11-27 23:28:53,775 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:54,606 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2024-11-27 23:28:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:28:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-11-27 23:28:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:54,607 INFO L225 Difference]: With dead ends: 94 [2024-11-27 23:28:54,607 INFO L226 Difference]: Without dead ends: 94 [2024-11-27 23:28:54,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=173, Invalid=1903, Unknown=2, NotChecked=178, Total=2256 [2024-11-27 23:28:54,608 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:54,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 803 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:28:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-27 23:28:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2024-11-27 23:28:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.36) internal successors, (102), 83 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2024-11-27 23:28:54,612 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 35 [2024-11-27 23:28:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:54,612 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2024-11-27 23:28:54,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:28:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2024-11-27 23:28:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 23:28:54,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:54,613 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:54,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:28:54,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:54,814 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:54,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 337709498, now seen corresponding path program 1 times [2024-11-27 23:28:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935700465] [2024-11-27 23:28:54,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:55,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935700465] [2024-11-27 23:28:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935700465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:55,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986736369] [2024-11-27 23:28:55,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:28:55,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:55,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:55,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:55,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:28:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:55,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-27 23:28:55,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:55,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:55,704 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:55,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:55,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:28:55,864 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:28:55,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2024-11-27 23:28:56,002 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 12 [2024-11-27 23:28:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:56,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:56,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:56,365 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-27 23:28:56,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:28:56,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2024-11-27 23:28:56,379 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 20 treesize of output 18 [2024-11-27 23:28:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986736369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:56,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:28:56,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2024-11-27 23:28:56,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680113630] [2024-11-27 23:28:56,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:56,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 23:28:56,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:56,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 23:28:56,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1456, Unknown=2, NotChecked=0, Total=1560 [2024-11-27 23:28:56,564 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:28:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:57,388 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-27 23:28:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:28:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-11-27 23:28:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:57,390 INFO L225 Difference]: With dead ends: 89 [2024-11-27 23:28:57,390 INFO L226 Difference]: Without dead ends: 89 [2024-11-27 23:28:57,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=2359, Unknown=2, NotChecked=0, Total=2550 [2024-11-27 23:28:57,391 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:57,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 819 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:28:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-27 23:28:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-11-27 23:28:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 83 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:28:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-11-27 23:28:57,401 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 37 [2024-11-27 23:28:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:57,402 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-11-27 23:28:57,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 26 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:28:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-11-27 23:28:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:28:57,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:57,403 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:57,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:28:57,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:57,603 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:28:57,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 511394784, now seen corresponding path program 2 times [2024-11-27 23:28:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922208664] [2024-11-27 23:28:57,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:57,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:57,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:58,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922208664] [2024-11-27 23:28:58,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922208664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408156436] [2024-11-27 23:28:58,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:58,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:58,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:58,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:58,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:28:58,880 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:58,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:58,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-27 23:28:58,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:58,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:28:58,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:28:58,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:28:58,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 23:28:58,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-27 23:28:59,008 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:28:59,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-27 23:28:59,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-27 23:28:59,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-27 23:28:59,154 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-27 23:28:59,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 50 [2024-11-27 23:28:59,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2024-11-27 23:28:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:28:59,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:01,344 INFO L349 Elim1Store]: treesize reduction 3117, result has 36.0 percent of original size [2024-11-27 23:29:01,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 7517 treesize of output 5494 [2024-11-27 23:29:01,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:29:01,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 7918 treesize of output 8010 [2024-11-27 23:29:08,096 WARN L286 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 685 DAG size of output: 386 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:29:08,098 INFO L349 Elim1Store]: treesize reduction 3122, result has 37.3 percent of original size [2024-11-27 23:29:08,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 109 case distinctions, treesize of input 46080 treesize of output 23003 [2024-11-27 23:29:11,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:29:11,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 14687 treesize of output 13875 [2024-11-27 23:32:00,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-27 23:32:00,054 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 23:32:00,058 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 23:32:00,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:32:00,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 23:32:00,259 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:360) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-27 23:32:00,267 INFO L158 Benchmark]: Toolchain (without parser) took 213912.34ms. Allocated memory was 142.6MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 115.5MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-27 23:32:00,267 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 117.4MB. Free memory was 74.7MB in the beginning and 74.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:32:00,267 INFO L158 Benchmark]: CACSL2BoogieTranslator took 573.41ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 96.5MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:32:00,268 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.91ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 95.0MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:32:00,268 INFO L158 Benchmark]: Boogie Preprocessor took 47.99ms. Allocated memory is still 142.6MB. Free memory was 95.0MB in the beginning and 92.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:32:00,268 INFO L158 Benchmark]: RCFGBuilder took 520.82ms. Allocated memory is still 142.6MB. Free memory was 92.9MB in the beginning and 76.9MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 23:32:00,272 INFO L158 Benchmark]: TraceAbstraction took 212714.16ms. Allocated memory was 142.6MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 76.2MB in the beginning and 1.3GB in the end (delta: -1.3GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-27 23:32:00,273 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 117.4MB. Free memory was 74.7MB in the beginning and 74.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 573.41ms. Allocated memory is still 142.6MB. Free memory was 115.3MB in the beginning and 96.5MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.91ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 95.0MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.99ms. Allocated memory is still 142.6MB. Free memory was 95.0MB in the beginning and 92.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 520.82ms. Allocated memory is still 142.6MB. Free memory was 92.9MB in the beginning and 76.9MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 212714.16ms. Allocated memory was 142.6MB in the beginning and 2.2GB in the end (delta: 2.0GB). Free memory was 76.2MB in the beginning and 1.3GB in the end (delta: -1.3GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/dll-backwards.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB --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 64bit --witnessprinter.graph.data.programhash c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:32:02,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:32:02,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2024-11-27 23:32:02,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:32:02,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:32:03,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:32:03,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:32:03,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:32:03,021 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:32:03,021 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:32:03,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:32:03,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:32:03,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:32:03,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:32:03,022 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:32:03,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:32:03,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:32:03,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:32:03,023 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:32:03,024 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:03,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:32:03,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:03,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 23:32:03,025 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:32:03,026 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:32:03,026 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:32:03,026 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:32:03,026 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c60e32c20f00ce4bcc840493e283bd0e8c8c7f70f8b1b7ef734d9ded702e93b8 [2024-11-27 23:32:03,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:32:03,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:32:03,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:32:03,457 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:32:03,459 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:32:03,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-11-27 23:32:07,395 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/0f1a64162/8c906e69af7146bdab3bff28dd2fd01f/FLAG29276fc69 [2024-11-27 23:32:07,872 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:32:07,875 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/sv-benchmarks/c/memsafety-broom/dll-backwards.i [2024-11-27 23:32:07,917 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/0f1a64162/8c906e69af7146bdab3bff28dd2fd01f/FLAG29276fc69 [2024-11-27 23:32:07,937 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/data/0f1a64162/8c906e69af7146bdab3bff28dd2fd01f [2024-11-27 23:32:07,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:32:07,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:32:07,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:07,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:32:07,950 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:32:07,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:07" (1/1) ... [2024-11-27 23:32:07,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5732cac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:07, skipping insertion in model container [2024-11-27 23:32:07,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:32:07" (1/1) ... [2024-11-27 23:32:08,029 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:32:08,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:08,519 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:32:08,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:32:08,647 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:32:08,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08 WrapperNode [2024-11-27 23:32:08,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:32:08,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:08,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:32:08,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:32:08,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,716 INFO L138 Inliner]: procedures = 120, calls = 19, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2024-11-27 23:32:08,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:32:08,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:32:08,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:32:08,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:32:08,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,730 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,763 INFO L175 MemorySlicer]: Split 9 memory accesses to 1 slices as follows [9]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 4 writes are split as follows [4]. [2024-11-27 23:32:08,764 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,764 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,780 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,780 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,796 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:32:08,799 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:32:08,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:32:08,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:32:08,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (1/1) ... [2024-11-27 23:32:08,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:32:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:08,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:32:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:32:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2024-11-27 23:32:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2024-11-27 23:32:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:32:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 23:32:08,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 23:32:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:32:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:32:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:32:09,040 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:32:09,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:32:09,602 INFO L? ?]: Removed 75 outVars from TransFormulas that were not future-live. [2024-11-27 23:32:09,603 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:32:09,614 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:32:09,614 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 23:32:09,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:09 BoogieIcfgContainer [2024-11-27 23:32:09,615 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:32:09,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:32:09,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:32:09,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:32:09,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:32:07" (1/3) ... [2024-11-27 23:32:09,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c7f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:09, skipping insertion in model container [2024-11-27 23:32:09,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:32:08" (2/3) ... [2024-11-27 23:32:09,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c7f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:32:09, skipping insertion in model container [2024-11-27 23:32:09,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:32:09" (3/3) ... [2024-11-27 23:32:09,626 INFO L128 eAbstractionObserver]: Analyzing ICFG dll-backwards.i [2024-11-27 23:32:09,642 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:32:09,643 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll-backwards.i that has 2 procedures, 64 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-11-27 23:32:09,683 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:32:09,697 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;@4e39f6a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:32:09,697 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-27 23:32:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-11-27 23:32:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-27 23:32:09,708 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:09,708 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 23:32:09,709 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:09,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash 37374253, now seen corresponding path program 1 times [2024-11-27 23:32:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905257074] [2024-11-27 23:32:09,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:09,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:09,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:09,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:09,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:32:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:09,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 23:32:09,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:09,917 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 7 [2024-11-27 23:32:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:09,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:09,948 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905257074] [2024-11-27 23:32:09,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905257074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:09,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:09,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710692694] [2024-11-27 23:32:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:09,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:09,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:09,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:09,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:09,983 INFO L87 Difference]: Start difference. First operand has 64 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 60 states have internal predecessors, (68), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:10,162 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2024-11-27 23:32:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-27 23:32:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:10,171 INFO L225 Difference]: With dead ends: 62 [2024-11-27 23:32:10,171 INFO L226 Difference]: Without dead ends: 60 [2024-11-27 23:32:10,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:10,175 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:10,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 101 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:32:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-27 23:32:10,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-27 23:32:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 56 states have internal predecessors, (60), 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) [2024-11-27 23:32:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-27 23:32:10,213 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 5 [2024-11-27 23:32:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:10,214 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-27 23:32:10,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-27 23:32:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-27 23:32:10,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:10,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 23:32:10,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:10,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:10,416 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:10,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 37374254, now seen corresponding path program 1 times [2024-11-27 23:32:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:10,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141249640] [2024-11-27 23:32:10,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:10,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:10,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:10,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:10,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:32:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:10,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:32:10,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:10,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:10,549 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:10,549 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141249640] [2024-11-27 23:32:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141249640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:10,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:10,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:32:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198822833] [2024-11-27 23:32:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:10,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:32:10,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:10,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:32:10,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:10,554 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:10,828 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2024-11-27 23:32:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:32:10,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 5 [2024-11-27 23:32:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:10,830 INFO L225 Difference]: With dead ends: 58 [2024-11-27 23:32:10,830 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 23:32:10,830 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:32:10,831 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:10,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:32:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 23:32:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 23:32:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 54 states have internal predecessors, (58), 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) [2024-11-27 23:32:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-27 23:32:10,838 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 5 [2024-11-27 23:32:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:10,838 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-27 23:32:10,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:32:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-27 23:32:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 23:32:10,839 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:10,841 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:10,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:32:11,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:11,042 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:11,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:11,042 INFO L85 PathProgramCache]: Analyzing trace with hash -183705932, now seen corresponding path program 1 times [2024-11-27 23:32:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11150436] [2024-11-27 23:32:11,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:11,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:11,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:32:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:11,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:32:11,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:11,264 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:11,264 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:11,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11150436] [2024-11-27 23:32:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11150436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:11,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:32:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746784037] [2024-11-27 23:32:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:11,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:32:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:11,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:32:11,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:11,267 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:11,720 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2024-11-27 23:32:11,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 15 [2024-11-27 23:32:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:11,722 INFO L225 Difference]: With dead ends: 64 [2024-11-27 23:32:11,722 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 23:32:11,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:11,723 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:11,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 233 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:32:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 23:32:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-11-27 23:32:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 59 states have internal predecessors, (65), 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) [2024-11-27 23:32:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2024-11-27 23:32:11,734 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 15 [2024-11-27 23:32:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:11,734 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2024-11-27 23:32:11,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2024-11-27 23:32:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 23:32:11,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:11,735 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:11,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:32:11,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:11,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:11,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -183705931, now seen corresponding path program 1 times [2024-11-27 23:32:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:11,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114155389] [2024-11-27 23:32:11,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:11,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:11,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:11,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:11,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:32:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:12,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:32:12,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:12,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:12,292 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:12,292 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114155389] [2024-11-27 23:32:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114155389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:32:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755007242] [2024-11-27 23:32:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:12,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:32:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:12,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:32:12,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:12,294 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:12,810 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-11-27 23:32:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 15 [2024-11-27 23:32:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:12,812 INFO L225 Difference]: With dead ends: 68 [2024-11-27 23:32:12,812 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 23:32:12,812 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:12,813 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 5 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:12,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 269 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:32:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 23:32:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-11-27 23:32:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 59 states have internal predecessors, (64), 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) [2024-11-27 23:32:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-27 23:32:12,828 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 15 [2024-11-27 23:32:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:12,829 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-27 23:32:12,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-27 23:32:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:32:12,830 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:12,830 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:12,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:32:13,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:13,031 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:13,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1866185865, now seen corresponding path program 1 times [2024-11-27 23:32:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:13,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456859037] [2024-11-27 23:32:13,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:13,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:13,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:13,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:32:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:13,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 23:32:13,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:13,396 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 23:32:13,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-27 23:32:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:13,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:20,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456859037] [2024-11-27 23:32:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456859037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:20,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:20,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2024-11-27 23:32:20,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346451429] [2024-11-27 23:32:20,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:20,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:32:20,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:20,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:32:20,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2024-11-27 23:32:20,669 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:32:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:21,347 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-11-27 23:32:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-27 23:32:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:21,349 INFO L225 Difference]: With dead ends: 63 [2024-11-27 23:32:21,349 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 23:32:21,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2024-11-27 23:32:21,351 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:21,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 228 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:32:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 23:32:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 23:32:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-27 23:32:21,367 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 20 [2024-11-27 23:32:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:21,367 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-27 23:32:21,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:32:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-27 23:32:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:32:21,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:21,368 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:21,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:32:21,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:21,569 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:21,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1866185864, now seen corresponding path program 1 times [2024-11-27 23:32:21,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:21,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259441378] [2024-11-27 23:32:21,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:21,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:21,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:21,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:32:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:21,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:32:21,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:21,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:22,111 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-27 23:32:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:22,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:32:22,231 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:32:22,231 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 13 treesize of output 13 [2024-11-27 23:32:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-27 23:32:22,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:22,786 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259441378] [2024-11-27 23:32:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259441378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020882920] [2024-11-27 23:32:22,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:32:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:32:22,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:32:22,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-27 23:32:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:22,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 23:32:22,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:22,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:23,003 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 7 [2024-11-27 23:32:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:32:23,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:32:23,346 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:32:23,347 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 13 treesize of output 13 [2024-11-27 23:32:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-27 23:32:23,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020882920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:23,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:23,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2024-11-27 23:32:23,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710365066] [2024-11-27 23:32:23,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:23,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:23,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:23,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:23,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2024-11-27 23:32:23,692 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:24,622 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2024-11-27 23:32:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:32:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-27 23:32:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:24,623 INFO L225 Difference]: With dead ends: 70 [2024-11-27 23:32:24,623 INFO L226 Difference]: Without dead ends: 70 [2024-11-27 23:32:24,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2024-11-27 23:32:24,624 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:24,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 226 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 70 Unchecked, 0.7s Time] [2024-11-27 23:32:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-27 23:32:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-27 23:32:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-11-27 23:32:24,630 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 20 [2024-11-27 23:32:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:24,631 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-11-27 23:32:24,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:32:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-11-27 23:32:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-27 23:32:24,632 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:24,632 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:24,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-27 23:32:24,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:25,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:25,033 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:25,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash -782186931, now seen corresponding path program 1 times [2024-11-27 23:32:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:25,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550889190] [2024-11-27 23:32:25,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:25,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:25,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:25,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:32:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:25,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 23:32:25,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:25,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:25,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:25,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-27 23:32:25,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-27 23:32:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:26,027 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:26,027 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:26,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550889190] [2024-11-27 23:32:26,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550889190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:26,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:26,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:32:26,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142336528] [2024-11-27 23:32:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:26,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:32:26,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:26,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:32:26,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:26,029 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:26,920 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2024-11-27 23:32:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-27 23:32:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:26,922 INFO L225 Difference]: With dead ends: 71 [2024-11-27 23:32:26,922 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 23:32:26,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:32:26,923 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:26,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 387 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:32:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 23:32:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-27 23:32:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.44) internal successors, (72), 65 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2024-11-27 23:32:26,930 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 19 [2024-11-27 23:32:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:26,931 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2024-11-27 23:32:26,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2024-11-27 23:32:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:32:26,932 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:26,932 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:26,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:32:27,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:27,133 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:27,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:27,133 INFO L85 PathProgramCache]: Analyzing trace with hash -60380993, now seen corresponding path program 1 times [2024-11-27 23:32:27,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:27,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290268599] [2024-11-27 23:32:27,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:27,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:27,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:27,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:32:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:27,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 23:32:27,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:27,491 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:27,491 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:27,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290268599] [2024-11-27 23:32:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290268599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:27,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:32:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995322465] [2024-11-27 23:32:27,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:27,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:27,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:27,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:27,493 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:28,399 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-27 23:32:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:32:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 21 [2024-11-27 23:32:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:28,401 INFO L225 Difference]: With dead ends: 72 [2024-11-27 23:32:28,401 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 23:32:28,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:28,402 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:28,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 263 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:32:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 23:32:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 23:32:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 67 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2024-11-27 23:32:28,409 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 21 [2024-11-27 23:32:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:28,410 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2024-11-27 23:32:28,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2024-11-27 23:32:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-27 23:32:28,411 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:28,411 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:28,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:32:28,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:28,612 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:28,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash -60380992, now seen corresponding path program 1 times [2024-11-27 23:32:28,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:28,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84537599] [2024-11-27 23:32:28,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:28,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:28,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:28,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:32:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:28,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 23:32:28,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:28,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:29,200 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:29,200 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84537599] [2024-11-27 23:32:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84537599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:32:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752008257] [2024-11-27 23:32:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:29,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:29,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:29,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:29,203 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:30,112 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2024-11-27 23:32:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:32:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 21 [2024-11-27 23:32:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:30,115 INFO L225 Difference]: With dead ends: 76 [2024-11-27 23:32:30,115 INFO L226 Difference]: Without dead ends: 76 [2024-11-27 23:32:30,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:30,116 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:30,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 295 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:32:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-27 23:32:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-27 23:32:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-27 23:32:30,127 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2024-11-27 23:32:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:30,128 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-27 23:32:30,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-27 23:32:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:32:30,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:30,131 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:30,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:32:30,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:30,332 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:30,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1486426742, now seen corresponding path program 1 times [2024-11-27 23:32:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636336562] [2024-11-27 23:32:30,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:30,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:30,335 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:30,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:32:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:30,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:30,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:30,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:32:30,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-27 23:32:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 23:32:30,634 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:30,634 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636336562] [2024-11-27 23:32:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636336562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:30,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:32:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746246411] [2024-11-27 23:32:30,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:30,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:32:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:30,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:32:30,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:30,635 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:31,271 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-27 23:32:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-27 23:32:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:31,273 INFO L225 Difference]: With dead ends: 75 [2024-11-27 23:32:31,273 INFO L226 Difference]: Without dead ends: 75 [2024-11-27 23:32:31,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:31,274 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:31,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 206 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:32:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-27 23:32:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-27 23:32:31,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 70 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-11-27 23:32:31,286 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 23 [2024-11-27 23:32:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:31,286 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-11-27 23:32:31,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-11-27 23:32:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:32:31,287 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:31,287 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:31,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:32:31,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:31,492 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:31,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1486426741, now seen corresponding path program 1 times [2024-11-27 23:32:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:31,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787098575] [2024-11-27 23:32:31,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:31,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:31,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:31,496 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:32:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:31,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:32:31,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:31,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:31,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:31,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:32:31,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 23:32:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:31,953 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:31,953 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:31,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787098575] [2024-11-27 23:32:31,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787098575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:31,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:31,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:32:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372260700] [2024-11-27 23:32:31,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:31,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:32:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:31,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:32:31,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:31,955 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:32,635 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2024-11-27 23:32:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2024-11-27 23:32:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:32,637 INFO L225 Difference]: With dead ends: 74 [2024-11-27 23:32:32,637 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 23:32:32,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:32:32,638 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:32,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 231 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:32:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 23:32:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-27 23:32:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.375) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2024-11-27 23:32:32,644 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 23 [2024-11-27 23:32:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:32,644 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2024-11-27 23:32:32,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2024-11-27 23:32:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:32:32,646 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:32,646 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:32,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:32:32,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:32,846 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:32,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2103476040, now seen corresponding path program 1 times [2024-11-27 23:32:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910779805] [2024-11-27 23:32:32,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:32,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:32,850 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:32,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:32:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:32,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 23:32:32,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:33,218 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:33,218 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:33,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910779805] [2024-11-27 23:32:33,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910779805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:33,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:33,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:32:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664025807] [2024-11-27 23:32:33,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:33,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:32:33,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:33,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:32:33,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:33,221 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:33,686 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2024-11-27 23:32:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:32:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 23 [2024-11-27 23:32:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:33,689 INFO L225 Difference]: With dead ends: 82 [2024-11-27 23:32:33,689 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 23:32:33,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:32:33,690 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 14 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:33,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 378 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:32:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 23:32:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-27 23:32:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 75 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2024-11-27 23:32:33,697 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 23 [2024-11-27 23:32:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:33,697 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2024-11-27 23:32:33,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2024-11-27 23:32:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 23:32:33,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:33,698 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:33,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:32:33,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:33,899 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:33,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 781182005, now seen corresponding path program 1 times [2024-11-27 23:32:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:33,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122182945] [2024-11-27 23:32:33,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:33,903 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:33,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:32:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:34,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:32:34,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:34,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:34,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:34,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:32:36,118 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:36,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122182945] [2024-11-27 23:32:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122182945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:36,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:36,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-11-27 23:32:36,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247217642] [2024-11-27 23:32:36,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:36,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-27 23:32:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:36,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-27 23:32:36,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:32:36,121 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:37,609 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2024-11-27 23:32:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 23:32:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-27 23:32:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:37,611 INFO L225 Difference]: With dead ends: 82 [2024-11-27 23:32:37,611 INFO L226 Difference]: Without dead ends: 82 [2024-11-27 23:32:37,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-27 23:32:37,612 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:37,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 709 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:32:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-27 23:32:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-27 23:32:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.359375) internal successors, (87), 77 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2024-11-27 23:32:37,619 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 24 [2024-11-27 23:32:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:37,619 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2024-11-27 23:32:37,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 19 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2024-11-27 23:32:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:32:37,621 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:37,621 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:37,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:32:37,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:37,822 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:37,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -903301826, now seen corresponding path program 1 times [2024-11-27 23:32:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:37,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156860902] [2024-11-27 23:32:37,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:37,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:37,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:37,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:37,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:32:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:37,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:32:37,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:38,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:38,270 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156860902] [2024-11-27 23:32:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156860902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:38,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:38,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:32:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13484881] [2024-11-27 23:32:38,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:38,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:32:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:38,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:32:38,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:38,272 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:39,178 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2024-11-27 23:32:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 26 [2024-11-27 23:32:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:39,179 INFO L225 Difference]: With dead ends: 83 [2024-11-27 23:32:39,179 INFO L226 Difference]: Without dead ends: 83 [2024-11-27 23:32:39,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:39,180 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:39,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 240 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:32:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-27 23:32:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-27 23:32:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 78 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2024-11-27 23:32:39,187 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2024-11-27 23:32:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:39,187 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2024-11-27 23:32:39,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2024-11-27 23:32:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:32:39,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:39,188 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:39,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 23:32:39,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:39,389 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:39,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash -903301825, now seen corresponding path program 1 times [2024-11-27 23:32:39,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:39,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726974642] [2024-11-27 23:32:39,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:39,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:39,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:39,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:39,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:32:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:39,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:32:39,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:39,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:32:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:40,066 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:40,066 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726974642] [2024-11-27 23:32:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726974642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:40,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:40,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:32:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927755025] [2024-11-27 23:32:40,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:40,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:32:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:40,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:32:40,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:40,068 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:41,146 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2024-11-27 23:32:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 26 [2024-11-27 23:32:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:41,149 INFO L225 Difference]: With dead ends: 88 [2024-11-27 23:32:41,149 INFO L226 Difference]: Without dead ends: 88 [2024-11-27 23:32:41,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:41,150 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:41,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 281 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 23:32:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-27 23:32:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-27 23:32:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.352112676056338) internal successors, (96), 83 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2024-11-27 23:32:41,155 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 26 [2024-11-27 23:32:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:41,156 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2024-11-27 23:32:41,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2024-11-27 23:32:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:32:41,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:41,157 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:41,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:32:41,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:41,359 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:41,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2062416867, now seen corresponding path program 1 times [2024-11-27 23:32:41,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:41,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822845421] [2024-11-27 23:32:41,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:41,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:41,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:41,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:41,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:32:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:41,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:32:41,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:41,743 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:41,743 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822845421] [2024-11-27 23:32:41,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822845421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:41,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:41,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 23:32:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66741991] [2024-11-27 23:32:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:41,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:32:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:41,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:32:41,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:41,745 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:42,255 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2024-11-27 23:32:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 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 27 [2024-11-27 23:32:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:42,257 INFO L225 Difference]: With dead ends: 103 [2024-11-27 23:32:42,257 INFO L226 Difference]: Without dead ends: 103 [2024-11-27 23:32:42,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:42,258 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:42,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 382 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:32:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-27 23:32:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2024-11-27 23:32:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-11-27 23:32:42,264 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 27 [2024-11-27 23:32:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:42,265 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-11-27 23:32:42,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-11-27 23:32:42,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 23:32:42,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:42,266 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:42,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:42,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:42,467 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:42,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2000442979, now seen corresponding path program 1 times [2024-11-27 23:32:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701638889] [2024-11-27 23:32:42,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:42,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:42,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:42,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:32:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:42,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 23:32:42,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:43,095 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:32:43,095 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701638889] [2024-11-27 23:32:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701638889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:32:43,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:32:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-27 23:32:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253037350] [2024-11-27 23:32:43,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:32:43,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:32:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:43,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:32:43,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:43,097 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:43,939 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2024-11-27 23:32:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 29 [2024-11-27 23:32:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:43,942 INFO L225 Difference]: With dead ends: 102 [2024-11-27 23:32:43,942 INFO L226 Difference]: Without dead ends: 102 [2024-11-27 23:32:43,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:32:43,943 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:43,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 340 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:32:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-27 23:32:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-27 23:32:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 93 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2024-11-27 23:32:43,949 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 29 [2024-11-27 23:32:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:43,951 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2024-11-27 23:32:43,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:32:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2024-11-27 23:32:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:32:43,954 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:43,954 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 23:32:43,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:44,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:44,155 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:44,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:44,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2088370990, now seen corresponding path program 1 times [2024-11-27 23:32:44,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:44,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898285408] [2024-11-27 23:32:44,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:44,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:44,158 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:44,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:32:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:44,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:32:44,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:32:44,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:44,504 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-27 23:32:44,505 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 16 treesize of output 15 [2024-11-27 23:32:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:32:44,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898285408] [2024-11-27 23:32:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898285408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:44,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:44,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2024-11-27 23:32:44,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445519812] [2024-11-27 23:32:44,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:44,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:32:44,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:44,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:32:44,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:32:44,540 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 6 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) [2024-11-27 23:32:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:45,049 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2024-11-27 23:32:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:32:45,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 31 [2024-11-27 23:32:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:45,051 INFO L225 Difference]: With dead ends: 105 [2024-11-27 23:32:45,051 INFO L226 Difference]: Without dead ends: 105 [2024-11-27 23:32:45,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:32:45,052 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:45,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 203 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 23:32:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-27 23:32:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-11-27 23:32:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.367816091954023) internal successors, (119), 99 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2024-11-27 23:32:45,058 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 31 [2024-11-27 23:32:45,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:45,059 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2024-11-27 23:32:45,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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) [2024-11-27 23:32:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2024-11-27 23:32:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-27 23:32:45,060 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:45,060 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 23:32:45,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:45,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:45,261 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:45,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2088370991, now seen corresponding path program 1 times [2024-11-27 23:32:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:45,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423651903] [2024-11-27 23:32:45,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:45,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:32:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:45,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 23:32:45,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:45,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:46,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:32:46,384 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 22 treesize of output 26 [2024-11-27 23:32:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:47,245 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423651903] [2024-11-27 23:32:47,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423651903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:47,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:47,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-11-27 23:32:47,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632056685] [2024-11-27 23:32:47,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:47,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 23:32:47,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:47,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 23:32:47,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:32:47,247 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:32:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:49,116 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2024-11-27 23:32:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:32:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-27 23:32:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:49,119 INFO L225 Difference]: With dead ends: 109 [2024-11-27 23:32:49,119 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 23:32:49,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:32:49,120 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 22 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:49,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 565 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-27 23:32:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 23:32:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2024-11-27 23:32:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 99 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-11-27 23:32:49,128 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 31 [2024-11-27 23:32:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:49,128 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-11-27 23:32:49,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:32:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-11-27 23:32:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-27 23:32:49,130 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:49,130 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:49,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:49,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:49,331 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:49,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1769282234, now seen corresponding path program 1 times [2024-11-27 23:32:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674653310] [2024-11-27 23:32:49,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:49,335 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:49,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:32:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:49,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:32:49,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:49,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:49,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:32:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:50,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:51,962 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:51,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674653310] [2024-11-27 23:32:51,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674653310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2024-11-27 23:32:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812211576] [2024-11-27 23:32:51,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:51,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 23:32:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:51,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 23:32:51,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2024-11-27 23:32:51,964 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 22 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:53,672 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2024-11-27 23:32:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:32:53,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 22 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-27 23:32:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:53,673 INFO L225 Difference]: With dead ends: 107 [2024-11-27 23:32:53,674 INFO L226 Difference]: Without dead ends: 107 [2024-11-27 23:32:53,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2024-11-27 23:32:53,675 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:53,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 598 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 23:32:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-27 23:32:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-27 23:32:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 102 states have internal predecessors, (121), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2024-11-27 23:32:53,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 32 [2024-11-27 23:32:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:53,681 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2024-11-27 23:32:53,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 22 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:32:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2024-11-27 23:32:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 23:32:53,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:53,682 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:53,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-27 23:32:53,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:53,883 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:32:53,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash 986827995, now seen corresponding path program 1 times [2024-11-27 23:32:53,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:32:53,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328678313] [2024-11-27 23:32:53,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:53,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:53,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:53,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:53,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:32:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:54,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:32:54,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:54,745 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~l#1.base_17| (_ BitVec 64))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_17| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_17|)))) is different from true [2024-11-27 23:32:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2024-11-27 23:32:54,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:55,486 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:32:55,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328678313] [2024-11-27 23:32:55,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328678313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:55,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883569171] [2024-11-27 23:32:55,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:32:55,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:32:55,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:32:55,489 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:32:55,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-27 23:32:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:32:55,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 23:32:55,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:32:56,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:57,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [883569171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:57,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:32:57,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-11-27 23:32:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372225895] [2024-11-27 23:32:57,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:57,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 23:32:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:32:57,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 23:32:57,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=453, Unknown=1, NotChecked=42, Total=552 [2024-11-27 23:32:57,590 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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) [2024-11-27 23:32:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:59,830 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2024-11-27 23:32:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 23:32:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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 33 [2024-11-27 23:32:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:59,832 INFO L225 Difference]: With dead ends: 109 [2024-11-27 23:32:59,832 INFO L226 Difference]: Without dead ends: 88 [2024-11-27 23:32:59,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=103, Invalid=956, Unknown=1, NotChecked=62, Total=1122 [2024-11-27 23:32:59,833 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 72 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:59,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 410 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 491 Invalid, 0 Unknown, 79 Unchecked, 1.7s Time] [2024-11-27 23:32:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-27 23:32:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-11-27 23:32:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 83 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:32:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-11-27 23:32:59,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 33 [2024-11-27 23:32:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:59,837 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-11-27 23:32:59,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 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) [2024-11-27 23:32:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-11-27 23:32:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 23:32:59,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:59,838 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:59,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:00,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 23:33:00,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:00,243 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:33:00,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -467870915, now seen corresponding path program 1 times [2024-11-27 23:33:00,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:33:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548644090] [2024-11-27 23:33:00,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:00,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:00,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:00,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:33:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:00,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-27 23:33:00,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:00,663 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:00,663 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 13 treesize of output 13 [2024-11-27 23:33:00,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:00,918 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:00,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-11-27 23:33:00,946 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 15 [2024-11-27 23:33:01,219 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 23:33:01,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-27 23:33:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:33:01,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:07,668 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_398 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_398) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))) is different from false [2024-11-27 23:33:07,684 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_398 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_398) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))))) is different from false [2024-11-27 23:33:07,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:07,704 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-27 23:33:07,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-11-27 23:33:07,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-27 23:33:07,910 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-27 23:33:07,910 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 16 treesize of output 15 [2024-11-27 23:33:08,463 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-27 23:33:08,464 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 16 treesize of output 15 [2024-11-27 23:33:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:33:12,657 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:33:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548644090] [2024-11-27 23:33:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548644090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:12,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2024-11-27 23:33:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064823096] [2024-11-27 23:33:12,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:12,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 23:33:12,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:33:12,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 23:33:12,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=334, Unknown=2, NotChecked=74, Total=462 [2024-11-27 23:33:12,660 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 23:33:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:14,436 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2024-11-27 23:33:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:33:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-11-27 23:33:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:14,439 INFO L225 Difference]: With dead ends: 87 [2024-11-27 23:33:14,439 INFO L226 Difference]: Without dead ends: 87 [2024-11-27 23:33:14,440 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=84, Invalid=522, Unknown=2, NotChecked=94, Total=702 [2024-11-27 23:33:14,444 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:14,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 574 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 422 Invalid, 0 Unknown, 65 Unchecked, 1.4s Time] [2024-11-27 23:33:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-27 23:33:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-27 23:33:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.408450704225352) internal successors, (100), 82 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:33:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-11-27 23:33:14,450 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 36 [2024-11-27 23:33:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:14,451 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-11-27 23:33:14,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-27 23:33:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-11-27 23:33:14,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 23:33:14,452 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:14,452 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:14,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 23:33:14,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:14,653 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:33:14,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -467870914, now seen corresponding path program 1 times [2024-11-27 23:33:14,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:33:14,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918516546] [2024-11-27 23:33:14,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:14,657 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:14,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 23:33:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:14,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:33:14,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:15,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:33:15,308 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:15,309 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 13 treesize of output 13 [2024-11-27 23:33:15,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:33:15,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:15,731 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:15,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2024-11-27 23:33:15,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 23:33:15,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-11-27 23:33:15,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:33:16,083 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-27 23:33:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:33:16,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:33:16,174 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:16,175 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 13 treesize of output 13 [2024-11-27 23:33:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2024-11-27 23:33:16,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:20,874 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:33:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918516546] [2024-11-27 23:33:20,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918516546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:20,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [631574082] [2024-11-27 23:33:20,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:20,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:33:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:33:20,877 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:33:20,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-27 23:33:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:21,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 23:33:21,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:21,341 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 7 [2024-11-27 23:33:21,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:33:21,778 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 23:33:21,778 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 27 [2024-11-27 23:33:21,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:33:21,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:22,415 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:22,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2024-11-27 23:33:22,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 23:33:22,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-11-27 23:33:22,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:33:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:33:23,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:33:23,103 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2024-11-27 23:33:23,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-27 23:33:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2024-11-27 23:33:23,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [631574082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:23,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 24 [2024-11-27 23:33:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246621809] [2024-11-27 23:33:23,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:23,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:33:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:33:23,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:33:23,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=571, Unknown=2, NotChecked=48, Total=702 [2024-11-27 23:33:23,721 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 19 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:33:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:25,876 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2024-11-27 23:33:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:33:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 19 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-11-27 23:33:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:25,879 INFO L225 Difference]: With dead ends: 84 [2024-11-27 23:33:25,879 INFO L226 Difference]: Without dead ends: 84 [2024-11-27 23:33:25,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=125, Invalid=807, Unknown=2, NotChecked=58, Total=992 [2024-11-27 23:33:25,881 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:25,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 477 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 58 Unchecked, 1.5s Time] [2024-11-27 23:33:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-27 23:33:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-27 23:33:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 79 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:33:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2024-11-27 23:33:25,888 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 36 [2024-11-27 23:33:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:25,888 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2024-11-27 23:33:25,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 19 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 23:33:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2024-11-27 23:33:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:33:25,889 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:25,890 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:25,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 23:33:26,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-27 23:33:26,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 23:33:26,291 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:33:26,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash -598532665, now seen corresponding path program 1 times [2024-11-27 23:33:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:33:26,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302191703] [2024-11-27 23:33:26,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:26,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:26,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:26,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 23:33:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:26,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 23:33:26,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:26,827 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:26,827 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 13 treesize of output 13 [2024-11-27 23:33:26,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:27,183 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:27,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-11-27 23:33:27,498 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 15 [2024-11-27 23:33:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:27,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:28,094 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_530 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_530) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))))) is different from false [2024-11-27 23:33:28,109 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_530 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_530) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))))) is different from false [2024-11-27 23:33:28,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:28,143 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-27 23:33:28,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:28,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2024-11-27 23:33:28,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-27 23:33:28,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:28,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 99 [2024-11-27 23:33:29,010 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:33:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302191703] [2024-11-27 23:33:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302191703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [129371355] [2024-11-27 23:33:29,010 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:29,010 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:33:29,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:33:29,013 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:33:29,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-27 23:33:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:29,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 23:33:29,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:29,440 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 7 [2024-11-27 23:33:30,354 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-27 23:33:30,355 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 27 [2024-11-27 23:33:30,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:31,037 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:31,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-11-27 23:33:31,703 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 15 [2024-11-27 23:33:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:32,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:32,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:32,850 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-27 23:33:32,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:32,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2024-11-27 23:33:32,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-27 23:33:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [129371355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:45,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:45,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2024-11-27 23:33:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225859217] [2024-11-27 23:33:45,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:45,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-27 23:33:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:33:45,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-27 23:33:45,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1565, Unknown=22, NotChecked=162, Total=1892 [2024-11-27 23:33:45,937 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:33:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:48,698 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2024-11-27 23:33:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:33:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-11-27 23:33:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:48,700 INFO L225 Difference]: With dead ends: 94 [2024-11-27 23:33:48,700 INFO L226 Difference]: Without dead ends: 94 [2024-11-27 23:33:48,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=189, Invalid=1959, Unknown=22, NotChecked=182, Total=2352 [2024-11-27 23:33:48,701 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:48,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 537 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-27 23:33:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-27 23:33:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2024-11-27 23:33:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 83 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:33:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-11-27 23:33:48,707 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 35 [2024-11-27 23:33:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:48,707 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-11-27 23:33:48,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 29 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:33:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-11-27 23:33:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 23:33:48,708 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:48,708 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:48,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-27 23:33:48,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 23:33:49,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:49,110 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:33:49,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -598532664, now seen corresponding path program 1 times [2024-11-27 23:33:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:33:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972285434] [2024-11-27 23:33:49,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:49,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:49,113 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:49,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 23:33:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:49,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 23:33:49,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:49,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:33:49,710 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:49,710 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 13 treesize of output 13 [2024-11-27 23:33:49,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:33:49,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:50,170 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:50,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-27 23:33:50,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 23:33:50,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:33:50,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:33:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:50,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:53,086 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_597 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_596 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv8 64) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_596) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_597) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) (forall ((v_ArrVal_596 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_596) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (bvule .cse0 (bvadd (_ bv8 64) .cse0))))) is different from false [2024-11-27 23:33:53,148 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_596 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| .cse1 v_ArrVal_596) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (bvule .cse0 (bvadd (_ bv8 64) .cse0)))) (forall ((v_ArrVal_597 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_596 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv8 64) (select (select (store |c_#memory_$Pointer$#0.offset| .cse1 v_ArrVal_596) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse1 v_ArrVal_597) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))))) is different from false [2024-11-27 23:33:53,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:53,211 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2024-11-27 23:33:53,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:53,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2024-11-27 23:33:53,283 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 5 [2024-11-27 23:33:53,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:53,367 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-11-27 23:33:53,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:53,389 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-27 23:33:53,395 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 23:33:53,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-27 23:33:53,411 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 23:33:53,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-27 23:33:54,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:33:54,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972285434] [2024-11-27 23:33:54,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972285434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:54,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [660910935] [2024-11-27 23:33:54,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:33:54,284 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:33:54,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:33:54,288 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:33:54,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2024-11-27 23:33:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:33:54,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-27 23:33:54,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:54,835 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 7 [2024-11-27 23:33:55,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:33:55,763 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:33:55,763 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 13 treesize of output 13 [2024-11-27 23:33:56,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:33:56,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:33:56,607 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:33:56,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-27 23:33:56,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 23:33:57,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:33:57,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:33:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:33:57,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:57,761 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_633 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_633) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (bvule .cse0 (bvadd (_ bv8 64) .cse0)))) (forall ((v_ArrVal_633 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_632 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv8 64) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_633) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_632) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))))) is different from false [2024-11-27 23:33:57,833 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_633 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_632 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv8 64) (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_633) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| .cse0 v_ArrVal_632) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) (forall ((v_ArrVal_633 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| .cse0 v_ArrVal_633) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|))) (bvule .cse1 (bvadd (_ bv8 64) .cse1)))))) is different from false [2024-11-27 23:33:57,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:57,882 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-11-27 23:33:57,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:57,906 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-27 23:33:57,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:57,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2024-11-27 23:33:58,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2024-11-27 23:33:58,234 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 [2024-11-27 23:33:58,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-27 23:33:58,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:58,287 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2024-11-27 23:33:58,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:33:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2024-11-27 23:33:58,376 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 5 [2024-11-27 23:33:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [660910935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:58,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:33:58,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2024-11-27 23:33:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155683060] [2024-11-27 23:33:58,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:58,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 23:33:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:33:58,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 23:33:58,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1162, Unknown=4, NotChecked=284, Total=1560 [2024-11-27 23:33:58,777 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:34:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:02,445 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2024-11-27 23:34:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:34:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-11-27 23:34:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:02,447 INFO L225 Difference]: With dead ends: 94 [2024-11-27 23:34:02,447 INFO L226 Difference]: Without dead ends: 94 [2024-11-27 23:34:02,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=157, Invalid=1577, Unknown=4, NotChecked=332, Total=2070 [2024-11-27 23:34:02,448 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:02,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 771 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-27 23:34:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-27 23:34:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2024-11-27 23:34:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.36) internal successors, (102), 83 states have internal predecessors, (102), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:34:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2024-11-27 23:34:02,453 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 35 [2024-11-27 23:34:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:02,453 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2024-11-27 23:34:02,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:34:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2024-11-27 23:34:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 23:34:02,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:02,455 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:02,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2024-11-27 23:34:02,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-27 23:34:02,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:02,856 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:34:02,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:02,856 INFO L85 PathProgramCache]: Analyzing trace with hash 337709498, now seen corresponding path program 1 times [2024-11-27 23:34:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983504493] [2024-11-27 23:34:02,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:02,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:02,859 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:02,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 23:34:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:03,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 23:34:03,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:03,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-27 23:34:03,484 WARN L873 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| alloc_and_zero_~pi~0.base)))) is different from true [2024-11-27 23:34:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:34:03,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:34:03,599 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:34:03,600 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 13 treesize of output 13 [2024-11-27 23:34:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-27 23:34:04,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:06,463 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 23:34:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983504493] [2024-11-27 23:34:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983504493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124634418] [2024-11-27 23:34:06,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:34:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 23:34:06,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 23:34:06,466 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 23:34:06,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-27 23:34:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:34:06,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 23:34:06,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:06,948 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 7 [2024-11-27 23:34:07,973 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:34:07,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-27 23:34:08,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 23:34:08,652 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:34:08,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2024-11-27 23:34:09,305 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 12 [2024-11-27 23:34:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:34:09,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:10,225 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_698 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_#t~mem7#1.base| v_ArrVal_698) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) is different from false [2024-11-27 23:34:10,239 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_698 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$#0.base| (select (select |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_698) |c_ULTIMATE.start_create_~dll~0#1.base|) |c_ULTIMATE.start_create_~dll~0#1.offset|)))) is different from false [2024-11-27 23:34:10,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:34:10,261 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-11-27 23:34:10,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:34:10,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2024-11-27 23:34:10,299 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 20 treesize of output 18 [2024-11-27 23:34:14,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124634418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:34:14,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:34:14,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2024-11-27 23:34:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709715552] [2024-11-27 23:34:14,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:14,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 23:34:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 23:34:14,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 23:34:14,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1532, Unknown=4, NotChecked=240, Total=1892 [2024-11-27 23:34:14,972 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:34:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:18,805 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-27 23:34:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:34:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-11-27 23:34:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:18,807 INFO L225 Difference]: With dead ends: 89 [2024-11-27 23:34:18,807 INFO L226 Difference]: Without dead ends: 89 [2024-11-27 23:34:18,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=200, Invalid=2358, Unknown=4, NotChecked=300, Total=2862 [2024-11-27 23:34:18,809 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:18,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 796 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 601 Invalid, 0 Unknown, 70 Unchecked, 2.0s Time] [2024-11-27 23:34:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-27 23:34:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-11-27 23:34:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 83 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:34:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2024-11-27 23:34:18,814 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 37 [2024-11-27 23:34:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:18,814 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2024-11-27 23:34:18,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 24 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:34:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2024-11-27 23:34:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:34:18,815 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:18,815 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:18,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 23:34:19,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-27 23:34:19,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 23:34:19,216 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 23:34:19,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash 511394784, now seen corresponding path program 2 times [2024-11-27 23:34:19,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 23:34:19,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229368732] [2024-11-27 23:34:19,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:34:19,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:34:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:34:19,220 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:34:19,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12d0efbd-5d9b-414c-bae7-e51a2cada85f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 23:34:19,556 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:34:19,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:34:19,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-27 23:34:19,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:19,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:34:19,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:34:19,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:34:19,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-27 23:34:20,223 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 23:34:20,224 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 13 treesize of output 13 [2024-11-27 23:34:20,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2024-11-27 23:34:20,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2024-11-27 23:34:20,943 INFO L349 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2024-11-27 23:34:20,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 68 [2024-11-27 23:34:20,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 28 [2024-11-27 23:34:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:34:22,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:57,830 WARN L286 SmtUtils]: Spent 22.19s on a formula simplification. DAG size of input: 215 DAG size of output: 160 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:34:57,830 INFO L349 Elim1Store]: treesize reduction 3045, result has 37.5 percent of original size [2024-11-27 23:34:57,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 19 case distinctions, treesize of input 4099 treesize of output 4131 [2024-11-27 23:34:58,758 INFO L224 Elim1Store]: Index analysis took 348 ms [2024-11-27 23:35:05,462 WARN L286 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:35:05,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:35:05,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 6692 treesize of output 6829 [2024-11-27 23:35:06,400 INFO L224 Elim1Store]: Index analysis took 283 ms [2024-11-27 23:36:06,385 WARN L286 SmtUtils]: Spent 59.86s on a formula simplification. DAG size of input: 631 DAG size of output: 379 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:36:06,385 INFO L349 Elim1Store]: treesize reduction 3134, result has 37.1 percent of original size [2024-11-27 23:36:06,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 13 select indices, 13 select index equivalence classes, 1 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 109 case distinctions, treesize of input 29012 treesize of output 15522 [2024-11-27 23:36:11,638 INFO L224 Elim1Store]: Index analysis took 764 ms [2024-11-27 23:36:16,794 WARN L286 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:36:16,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:36:16,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 12293 treesize of output 12135