./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:34:33,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:34:33,610 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:34:33,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:34:33,619 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:34:33,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:34:33,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:34:33,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:34:33,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:34:33,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:34:33,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:34:33,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:34:33,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:34:33,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:34:33,664 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:34:33,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:34:33,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:34:33,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:34:33,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:34:33,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:34:33,666 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:34:33,671 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:34:33,671 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:34:33,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:34:33,672 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:34:33,672 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:34:33,673 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:34:33,673 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:34:33,673 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:34:33,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:34:33,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:34:33,674 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:34:33,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:34:33,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:34:33,677 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:34:33,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:34:33,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:34:33,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:34:33,679 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:34:33,679 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:34:33,680 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:34:33,680 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:34:33,680 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2024-11-08 16:34:33,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:34:34,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:34:34,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:34:34,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:34:34,025 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:34:34,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i Unable to find full path for "g++" [2024-11-08 16:34:36,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:34:36,275 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:34:36,276 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2024-11-08 16:34:36,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/data/e33e682f3/ef1376d857b44ed6ae461a343e5cc50d/FLAGcd4a5400d [2024-11-08 16:34:36,312 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/data/e33e682f3/ef1376d857b44ed6ae461a343e5cc50d [2024-11-08 16:34:36,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:34:36,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:34:36,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:34:36,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:34:36,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:34:36,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec70396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36, skipping insertion in model container [2024-11-08 16:34:36,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,370 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:34:36,702 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:34:36,704 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:34:36,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:34:36,725 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:34:36,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:34:36,834 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:34:36,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36 WrapperNode [2024-11-08 16:34:36,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:34:36,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:34:36,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:34:36,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:34:36,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,860 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,887 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2024-11-08 16:34:36,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:34:36,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:34:36,890 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:34:36,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:34:36,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,905 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,925 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-08 16:34:36,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,932 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,939 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:34:36,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:34:36,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:34:36,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:34:36,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (1/1) ... [2024-11-08 16:34:36,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:34:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:36,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:34:36,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:34:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:34:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:34:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:34:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:34:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 16:34:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:34:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:34:37,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:34:37,174 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:34:37,176 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:34:37,406 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-11-08 16:34:37,406 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:34:37,423 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:34:37,423 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 16:34:37,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:34:37 BoogieIcfgContainer [2024-11-08 16:34:37,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:34:37,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:34:37,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:34:37,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:34:37,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:34:36" (1/3) ... [2024-11-08 16:34:37,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6474ef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:34:37, skipping insertion in model container [2024-11-08 16:34:37,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:36" (2/3) ... [2024-11-08 16:34:37,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6474ef84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:34:37, skipping insertion in model container [2024-11-08 16:34:37,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:34:37" (3/3) ... [2024-11-08 16:34:37,434 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2024-11-08 16:34:37,454 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:34:37,455 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-08 16:34:37,501 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:34:37,508 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;@1b090e33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:34:37,508 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-11-08 16:34:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:34:37,520 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:37,520 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:37,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:37,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash 121323279, now seen corresponding path program 1 times [2024-11-08 16:34:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:37,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496341584] [2024-11-08 16:34:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:37,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496341584] [2024-11-08 16:34:37,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496341584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:37,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:37,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:37,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456718425] [2024-11-08 16:34:37,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:37,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:38,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:38,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:38,032 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:38,134 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-11-08 16:34:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:34:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 16:34:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:38,147 INFO L225 Difference]: With dead ends: 56 [2024-11-08 16:34:38,147 INFO L226 Difference]: Without dead ends: 54 [2024-11-08 16:34:38,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:38,154 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:38,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-08 16:34:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2024-11-08 16:34:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-08 16:34:38,195 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2024-11-08 16:34:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:38,196 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-08 16:34:38,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-08 16:34:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:34:38,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:38,199 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:38,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:34:38,200 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:38,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash 178581581, now seen corresponding path program 1 times [2024-11-08 16:34:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378532798] [2024-11-08 16:34:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378532798] [2024-11-08 16:34:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378532798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:38,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:38,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:34:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950606446] [2024-11-08 16:34:38,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:38,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:38,735 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:38,837 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-11-08 16:34:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 16:34:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:38,838 INFO L225 Difference]: With dead ends: 62 [2024-11-08 16:34:38,838 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 16:34:38,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:38,841 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:38,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 73 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 16:34:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2024-11-08 16:34:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-08 16:34:38,850 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 8 [2024-11-08 16:34:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:38,850 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-08 16:34:38,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-08 16:34:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 16:34:38,851 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:38,852 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:38,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:34:38,852 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:38,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:38,853 INFO L85 PathProgramCache]: Analyzing trace with hash 178581582, now seen corresponding path program 1 times [2024-11-08 16:34:38,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:38,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763103580] [2024-11-08 16:34:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:38,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:39,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:39,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763103580] [2024-11-08 16:34:39,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763103580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:39,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:39,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:34:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886663352] [2024-11-08 16:34:39,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:39,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:34:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:34:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:34:39,123 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:39,229 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2024-11-08 16:34:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:39,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-08 16:34:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:39,232 INFO L225 Difference]: With dead ends: 46 [2024-11-08 16:34:39,233 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 16:34:39,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:34:39,234 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:39,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 88 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 16:34:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-08 16:34:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-08 16:34:39,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 8 [2024-11-08 16:34:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:39,247 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-08 16:34:39,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-08 16:34:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:34:39,248 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:39,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:39,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:34:39,248 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:39,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 637962110, now seen corresponding path program 1 times [2024-11-08 16:34:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745771710] [2024-11-08 16:34:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:39,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745771710] [2024-11-08 16:34:39,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745771710] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:39,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:39,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543593563] [2024-11-08 16:34:39,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:39,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:39,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:39,335 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:39,371 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-08 16:34:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:34:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 16:34:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:39,374 INFO L225 Difference]: With dead ends: 63 [2024-11-08 16:34:39,375 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 16:34:39,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:39,376 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:39,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 16:34:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-08 16:34:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-11-08 16:34:39,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 10 [2024-11-08 16:34:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:39,387 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-11-08 16:34:39,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-11-08 16:34:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:34:39,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:39,391 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:39,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:34:39,391 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:39,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 637972938, now seen corresponding path program 1 times [2024-11-08 16:34:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:39,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414706896] [2024-11-08 16:34:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:39,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:39,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:39,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414706896] [2024-11-08 16:34:39,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414706896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:34:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196943579] [2024-11-08 16:34:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:39,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:39,595 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:39,631 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2024-11-08 16:34:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:34:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 16:34:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:39,632 INFO L225 Difference]: With dead ends: 68 [2024-11-08 16:34:39,632 INFO L226 Difference]: Without dead ends: 68 [2024-11-08 16:34:39,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:39,634 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:39,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-08 16:34:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-08 16:34:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.509090909090909) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2024-11-08 16:34:39,640 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 10 [2024-11-08 16:34:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:39,641 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2024-11-08 16:34:39,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2024-11-08 16:34:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:34:39,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:39,642 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:39,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:34:39,643 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:39,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1881997824, now seen corresponding path program 1 times [2024-11-08 16:34:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:39,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579957770] [2024-11-08 16:34:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:39,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:39,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579957770] [2024-11-08 16:34:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579957770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474216823] [2024-11-08 16:34:39,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:39,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:39,787 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:39,850 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2024-11-08 16:34:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 16:34:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:39,851 INFO L225 Difference]: With dead ends: 65 [2024-11-08 16:34:39,851 INFO L226 Difference]: Without dead ends: 65 [2024-11-08 16:34:39,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:39,853 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:39,853 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-08 16:34:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-11-08 16:34:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2024-11-08 16:34:39,858 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 10 [2024-11-08 16:34:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:39,859 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2024-11-08 16:34:39,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2024-11-08 16:34:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:34:39,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:39,860 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:39,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:34:39,861 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:39,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1881997823, now seen corresponding path program 1 times [2024-11-08 16:34:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243108174] [2024-11-08 16:34:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243108174] [2024-11-08 16:34:40,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243108174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:40,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:34:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730290739] [2024-11-08 16:34:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:40,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:34:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:34:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:40,063 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:40,225 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2024-11-08 16:34:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:34:40,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 16:34:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:40,226 INFO L225 Difference]: With dead ends: 72 [2024-11-08 16:34:40,227 INFO L226 Difference]: Without dead ends: 72 [2024-11-08 16:34:40,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:34:40,228 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:40,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 121 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-08 16:34:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-11-08 16:34:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 69 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2024-11-08 16:34:40,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 10 [2024-11-08 16:34:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:40,241 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2024-11-08 16:34:40,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2024-11-08 16:34:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 16:34:40,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:40,242 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:40,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:34:40,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:40,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -171373688, now seen corresponding path program 1 times [2024-11-08 16:34:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562236559] [2024-11-08 16:34:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562236559] [2024-11-08 16:34:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562236559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458632610] [2024-11-08 16:34:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:40,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:40,407 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:40,479 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2024-11-08 16:34:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:40,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 16:34:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:40,480 INFO L225 Difference]: With dead ends: 85 [2024-11-08 16:34:40,481 INFO L226 Difference]: Without dead ends: 85 [2024-11-08 16:34:40,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:40,482 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:40,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 83 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-08 16:34:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2024-11-08 16:34:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 69 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2024-11-08 16:34:40,487 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 10 [2024-11-08 16:34:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:40,488 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2024-11-08 16:34:40,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2024-11-08 16:34:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:34:40,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:40,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:40,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:34:40,489 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:40,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1697675409, now seen corresponding path program 1 times [2024-11-08 16:34:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091373001] [2024-11-08 16:34:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:40,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:40,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091373001] [2024-11-08 16:34:40,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091373001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:40,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:40,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:34:40,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905651771] [2024-11-08 16:34:40,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:40,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:40,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:40,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:40,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:40,635 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:40,665 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2024-11-08 16:34:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:34:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:34:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:40,667 INFO L225 Difference]: With dead ends: 77 [2024-11-08 16:34:40,667 INFO L226 Difference]: Without dead ends: 77 [2024-11-08 16:34:40,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:40,668 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:40,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-08 16:34:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-08 16:34:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 74 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2024-11-08 16:34:40,673 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 11 [2024-11-08 16:34:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:40,673 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2024-11-08 16:34:40,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2024-11-08 16:34:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 16:34:40,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:40,674 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:40,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:34:40,675 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:40,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1787945261, now seen corresponding path program 1 times [2024-11-08 16:34:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:40,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091986140] [2024-11-08 16:34:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091986140] [2024-11-08 16:34:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091986140] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:40,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:40,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740745241] [2024-11-08 16:34:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:40,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:40,793 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:40,834 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2024-11-08 16:34:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-08 16:34:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:40,835 INFO L225 Difference]: With dead ends: 74 [2024-11-08 16:34:40,836 INFO L226 Difference]: Without dead ends: 74 [2024-11-08 16:34:40,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:40,836 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:40,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 67 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-08 16:34:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2024-11-08 16:34:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.459016393442623) internal successors, (89), 68 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2024-11-08 16:34:40,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 11 [2024-11-08 16:34:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:40,841 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2024-11-08 16:34:40,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2024-11-08 16:34:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 16:34:40,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:40,842 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:40,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:34:40,842 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:40,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1390997254, now seen corresponding path program 1 times [2024-11-08 16:34:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:40,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325749130] [2024-11-08 16:34:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:41,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325749130] [2024-11-08 16:34:41,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325749130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:41,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110654315] [2024-11-08 16:34:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:41,149 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:41,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:34:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:41,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:34:41,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:34:41,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:34:41,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-08 16:34:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:41,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:34:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:41,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110654315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:41,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:41,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-08 16:34:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169419934] [2024-11-08 16:34:41,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:41,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 16:34:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 16:34:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:34:41,962 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:42,204 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2024-11-08 16:34:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:34:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 16:34:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:42,206 INFO L225 Difference]: With dead ends: 72 [2024-11-08 16:34:42,206 INFO L226 Difference]: Without dead ends: 72 [2024-11-08 16:34:42,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:34:42,207 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:42,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 172 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-08 16:34:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2024-11-08 16:34:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-11-08 16:34:42,211 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 12 [2024-11-08 16:34:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:42,211 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-11-08 16:34:42,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-11-08 16:34:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:34:42,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:42,213 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:42,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:34:42,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 16:34:42,417 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:42,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2086764461, now seen corresponding path program 1 times [2024-11-08 16:34:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209540603] [2024-11-08 16:34:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:42,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:42,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209540603] [2024-11-08 16:34:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209540603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:42,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:42,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:34:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956341614] [2024-11-08 16:34:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:42,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:42,498 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:42,559 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-08 16:34:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:34:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:42,560 INFO L225 Difference]: With dead ends: 63 [2024-11-08 16:34:42,560 INFO L226 Difference]: Without dead ends: 63 [2024-11-08 16:34:42,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:34:42,561 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:42,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 79 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-08 16:34:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-08 16:34:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-11-08 16:34:42,568 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 14 [2024-11-08 16:34:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:42,568 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-11-08 16:34:42,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-11-08 16:34:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:34:42,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:42,573 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:42,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:34:42,573 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:42,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:42,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2086764462, now seen corresponding path program 1 times [2024-11-08 16:34:42,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:42,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665210740] [2024-11-08 16:34:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:42,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:42,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:42,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665210740] [2024-11-08 16:34:42,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665210740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:42,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:42,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:34:42,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027995284] [2024-11-08 16:34:42,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:42,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:34:42,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:42,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:34:42,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:42,749 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:42,852 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2024-11-08 16:34:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:34:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:34:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:42,853 INFO L225 Difference]: With dead ends: 70 [2024-11-08 16:34:42,853 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 16:34:42,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:34:42,854 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:42,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 132 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 16:34:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2024-11-08 16:34:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2024-11-08 16:34:42,858 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 14 [2024-11-08 16:34:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:42,858 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2024-11-08 16:34:42,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2024-11-08 16:34:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:34:42,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:42,862 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:42,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 16:34:42,863 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:42,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1378543481, now seen corresponding path program 1 times [2024-11-08 16:34:42,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:42,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198539640] [2024-11-08 16:34:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:42,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198539640] [2024-11-08 16:34:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198539640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609173132] [2024-11-08 16:34:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:43,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:43,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:34:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:43,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:34:43,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:43,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-08 16:34:43,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:34:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:43,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:44,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609173132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:44,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-08 16:34:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952366470] [2024-11-08 16:34:44,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:44,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:34:44,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:34:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:34:44,013 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:44,417 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2024-11-08 16:34:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:34:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:34:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:44,419 INFO L225 Difference]: With dead ends: 74 [2024-11-08 16:34:44,419 INFO L226 Difference]: Without dead ends: 74 [2024-11-08 16:34:44,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:34:44,420 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:44,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 178 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:34:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-08 16:34:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2024-11-08 16:34:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.320754716981132) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-11-08 16:34:44,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 14 [2024-11-08 16:34:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:44,424 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-11-08 16:34:44,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-11-08 16:34:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 16:34:44,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:44,425 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:44,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:34:44,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:34:44,626 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:44,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:44,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1023949888, now seen corresponding path program 1 times [2024-11-08 16:34:44,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841964201] [2024-11-08 16:34:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841964201] [2024-11-08 16:34:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841964201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:44,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 16:34:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534700137] [2024-11-08 16:34:44,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:44,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:34:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:34:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:44,849 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:44,892 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-11-08 16:34:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:34:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 16:34:44,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:44,894 INFO L225 Difference]: With dead ends: 57 [2024-11-08 16:34:44,894 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 16:34:44,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:44,895 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:44,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 16:34:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2024-11-08 16:34:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-11-08 16:34:44,897 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 14 [2024-11-08 16:34:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:44,898 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-11-08 16:34:44,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-11-08 16:34:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 16:34:44,899 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:44,899 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:44,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 16:34:44,899 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:44,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:44,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1443453210, now seen corresponding path program 1 times [2024-11-08 16:34:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515510013] [2024-11-08 16:34:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:44,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:44,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515510013] [2024-11-08 16:34:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515510013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:44,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:44,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:34:44,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368685208] [2024-11-08 16:34:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:44,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:34:44,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:44,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:34:44,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:34:44,981 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:45,059 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-11-08 16:34:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:34:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 16:34:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:45,060 INFO L225 Difference]: With dead ends: 46 [2024-11-08 16:34:45,060 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 16:34:45,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:34:45,061 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:45,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 91 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 16:34:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-08 16:34:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-08 16:34:45,064 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 17 [2024-11-08 16:34:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:45,065 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-08 16:34:45,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-08 16:34:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 16:34:45,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:45,066 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:45,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 16:34:45,066 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:45,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1443453211, now seen corresponding path program 1 times [2024-11-08 16:34:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:45,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037249572] [2024-11-08 16:34:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:45,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:45,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037249572] [2024-11-08 16:34:45,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037249572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:45,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:45,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-08 16:34:45,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807778575] [2024-11-08 16:34:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:45,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 16:34:45,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 16:34:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:34:45,303 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:45,445 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2024-11-08 16:34:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 16:34:45,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 16:34:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:45,446 INFO L225 Difference]: With dead ends: 53 [2024-11-08 16:34:45,446 INFO L226 Difference]: Without dead ends: 53 [2024-11-08 16:34:45,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:34:45,447 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:45,447 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 109 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-08 16:34:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2024-11-08 16:34:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-08 16:34:45,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2024-11-08 16:34:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:45,450 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-08 16:34:45,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-08 16:34:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 16:34:45,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:45,451 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:45,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 16:34:45,451 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:45,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 288941310, now seen corresponding path program 1 times [2024-11-08 16:34:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:45,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907074495] [2024-11-08 16:34:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907074495] [2024-11-08 16:34:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907074495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:45,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:34:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318574758] [2024-11-08 16:34:45,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:45,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:34:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:34:45,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:45,637 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:45,661 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-11-08 16:34:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:34:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 16:34:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:45,662 INFO L225 Difference]: With dead ends: 46 [2024-11-08 16:34:45,662 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 16:34:45,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:34:45,663 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:45,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:34:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 16:34:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-08 16:34:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-08 16:34:45,666 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 21 [2024-11-08 16:34:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:45,666 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-08 16:34:45,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-08 16:34:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:34:45,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:45,667 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:45,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-08 16:34:45,668 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:45,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:45,668 INFO L85 PathProgramCache]: Analyzing trace with hash 367296057, now seen corresponding path program 1 times [2024-11-08 16:34:45,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:45,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782676967] [2024-11-08 16:34:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:45,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782676967] [2024-11-08 16:34:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782676967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 16:34:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179840304] [2024-11-08 16:34:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:45,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:34:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:34:45,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:34:45,915 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:45,990 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-11-08 16:34:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:34:45,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:34:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:45,992 INFO L225 Difference]: With dead ends: 66 [2024-11-08 16:34:45,992 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 16:34:45,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:34:45,993 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:45,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 191 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 16:34:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-08 16:34:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2024-11-08 16:34:45,996 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 22 [2024-11-08 16:34:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:45,996 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2024-11-08 16:34:45,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2024-11-08 16:34:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:34:45,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:45,997 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:45,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 16:34:45,998 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:45,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash 367298235, now seen corresponding path program 1 times [2024-11-08 16:34:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595130214] [2024-11-08 16:34:45,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:45,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:46,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595130214] [2024-11-08 16:34:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595130214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:46,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:46,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 16:34:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697033989] [2024-11-08 16:34:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:46,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 16:34:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:46,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 16:34:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:34:46,217 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:46,331 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-11-08 16:34:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:34:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:34:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:46,333 INFO L225 Difference]: With dead ends: 92 [2024-11-08 16:34:46,333 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 16:34:46,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:34:46,334 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:46,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 16:34:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-08 16:34:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-11-08 16:34:46,338 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 22 [2024-11-08 16:34:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:46,338 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-11-08 16:34:46,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-11-08 16:34:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:34:46,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:46,339 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:46,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 16:34:46,340 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:46,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1321645507, now seen corresponding path program 1 times [2024-11-08 16:34:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:46,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792010491] [2024-11-08 16:34:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:46,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:46,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792010491] [2024-11-08 16:34:46,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792010491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:46,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:46,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-08 16:34:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547123823] [2024-11-08 16:34:46,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:46,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:34:46,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:34:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:34:46,683 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:46,846 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2024-11-08 16:34:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:34:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:34:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:46,847 INFO L225 Difference]: With dead ends: 110 [2024-11-08 16:34:46,847 INFO L226 Difference]: Without dead ends: 98 [2024-11-08 16:34:46,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:34:46,848 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:46,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 172 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-08 16:34:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2024-11-08 16:34:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2024-11-08 16:34:46,853 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 22 [2024-11-08 16:34:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:46,854 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2024-11-08 16:34:46,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2024-11-08 16:34:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 16:34:46,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:46,855 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:46,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 16:34:46,855 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:46,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash -450352393, now seen corresponding path program 1 times [2024-11-08 16:34:46,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:46,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43003247] [2024-11-08 16:34:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:47,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:47,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43003247] [2024-11-08 16:34:47,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43003247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:47,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:47,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-08 16:34:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692801526] [2024-11-08 16:34:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:47,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 16:34:47,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 16:34:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-08 16:34:47,105 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:47,210 INFO L93 Difference]: Finished difference Result 123 states and 141 transitions. [2024-11-08 16:34:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:34:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 16:34:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:47,212 INFO L225 Difference]: With dead ends: 123 [2024-11-08 16:34:47,212 INFO L226 Difference]: Without dead ends: 109 [2024-11-08 16:34:47,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:34:47,213 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:47,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 171 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:34:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-08 16:34:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2024-11-08 16:34:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2024-11-08 16:34:47,216 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 22 [2024-11-08 16:34:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:47,216 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2024-11-08 16:34:47,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2024-11-08 16:34:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:34:47,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:47,217 INFO L215 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] [2024-11-08 16:34:47,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-08 16:34:47,218 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:47,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1218003019, now seen corresponding path program 1 times [2024-11-08 16:34:47,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:47,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586952777] [2024-11-08 16:34:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:47,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:47,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586952777] [2024-11-08 16:34:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586952777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080731728] [2024-11-08 16:34:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:47,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:47,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:47,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:34:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:47,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:34:47,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:47,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:48,113 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 [2024-11-08 16:34:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080731728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:48,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:48,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-08 16:34:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398265760] [2024-11-08 16:34:48,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:48,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:34:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:34:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:34:48,156 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:48,467 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2024-11-08 16:34:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:34:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:34:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:48,469 INFO L225 Difference]: With dead ends: 100 [2024-11-08 16:34:48,469 INFO L226 Difference]: Without dead ends: 100 [2024-11-08 16:34:48,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:34:48,470 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:48,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 233 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:34:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-08 16:34:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2024-11-08 16:34:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 90 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2024-11-08 16:34:48,475 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 26 [2024-11-08 16:34:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:48,475 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2024-11-08 16:34:48,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2024-11-08 16:34:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-08 16:34:48,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:48,477 INFO L215 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] [2024-11-08 16:34:48,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:34:48,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 16:34:48,678 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:48,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1162610607, now seen corresponding path program 1 times [2024-11-08 16:34:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:48,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045725947] [2024-11-08 16:34:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:48,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045725947] [2024-11-08 16:34:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045725947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548274513] [2024-11-08 16:34:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:48,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:48,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:48,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:34:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:49,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 16:34:49,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:49,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:49,386 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 [2024-11-08 16:34:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548274513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:49,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:49,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-08 16:34:49,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640315221] [2024-11-08 16:34:49,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:49,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:34:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:34:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:34:49,427 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:49,686 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2024-11-08 16:34:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:34:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-08 16:34:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:49,687 INFO L225 Difference]: With dead ends: 121 [2024-11-08 16:34:49,687 INFO L226 Difference]: Without dead ends: 121 [2024-11-08 16:34:49,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-08 16:34:49,688 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:49,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 356 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:34:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-08 16:34:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-11-08 16:34:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-11-08 16:34:49,693 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 26 [2024-11-08 16:34:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:49,693 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-11-08 16:34:49,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-11-08 16:34:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 16:34:49,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:49,694 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:49,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 16:34:49,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 16:34:49,898 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:49,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash 465645665, now seen corresponding path program 2 times [2024-11-08 16:34:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295969901] [2024-11-08 16:34:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:50,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:50,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295969901] [2024-11-08 16:34:50,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295969901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:50,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485485634] [2024-11-08 16:34:50,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:34:50,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:50,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:50,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:34:50,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:34:50,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:50,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 16:34:50,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:50,526 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 14 treesize of output 10 [2024-11-08 16:34:51,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:34:51,021 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 20 treesize of output 17 [2024-11-08 16:34:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:51,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:52,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:34:52,070 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 15 treesize of output 11 [2024-11-08 16:34:52,078 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 24 treesize of output 20 [2024-11-08 16:34:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:52,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485485634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:52,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:52,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2024-11-08 16:34:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975441211] [2024-11-08 16:34:52,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:52,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 16:34:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 16:34:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 16:34:52,126 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:54,243 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2024-11-08 16:34:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 16:34:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-08 16:34:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:54,245 INFO L225 Difference]: With dead ends: 204 [2024-11-08 16:34:54,245 INFO L226 Difference]: Without dead ends: 187 [2024-11-08 16:34:54,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:34:54,247 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:54,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 367 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:34:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-08 16:34:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2024-11-08 16:34:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.155688622754491) internal successors, (193), 168 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 193 transitions. [2024-11-08 16:34:54,254 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 193 transitions. Word has length 31 [2024-11-08 16:34:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:54,255 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 193 transitions. [2024-11-08 16:34:54,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 193 transitions. [2024-11-08 16:34:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 16:34:54,256 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:54,256 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:54,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:34:54,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 16:34:54,461 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:54,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1141601594, now seen corresponding path program 2 times [2024-11-08 16:34:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:54,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409059654] [2024-11-08 16:34:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:55,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409059654] [2024-11-08 16:34:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409059654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76604192] [2024-11-08 16:34:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:34:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:55,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:55,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:34:55,332 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:34:55,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:55,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 16:34:55,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:55,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 16:34:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:55,690 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:55,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:34:55,730 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 16 treesize of output 12 [2024-11-08 16:34:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:55,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76604192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:55,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:55,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 13] total 33 [2024-11-08 16:34:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069283075] [2024-11-08 16:34:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:55,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 16:34:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:55,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 16:34:55,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 16:34:55,834 INFO L87 Difference]: Start difference. First operand 169 states and 193 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:56,504 INFO L93 Difference]: Finished difference Result 305 states and 336 transitions. [2024-11-08 16:34:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 16:34:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 16:34:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:56,506 INFO L225 Difference]: With dead ends: 305 [2024-11-08 16:34:56,506 INFO L226 Difference]: Without dead ends: 240 [2024-11-08 16:34:56,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2024-11-08 16:34:56,507 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:56,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 600 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:34:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-08 16:34:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2024-11-08 16:34:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.1523809523809523) internal successors, (242), 211 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 242 transitions. [2024-11-08 16:34:56,513 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 242 transitions. Word has length 34 [2024-11-08 16:34:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:56,514 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 242 transitions. [2024-11-08 16:34:56,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 242 transitions. [2024-11-08 16:34:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 16:34:56,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:56,515 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:56,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:34:56,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 16:34:56,719 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:56,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1888354830, now seen corresponding path program 3 times [2024-11-08 16:34:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:56,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543510043] [2024-11-08 16:34:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543510043] [2024-11-08 16:34:57,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543510043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:57,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625244434] [2024-11-08 16:34:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:34:57,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:57,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:57,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:57,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:34:57,196 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 16:34:57,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:57,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 16:34:57,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:57,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:57,659 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 21 treesize of output 17 [2024-11-08 16:34:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:57,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625244434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:57,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:57,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-11-08 16:34:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171664547] [2024-11-08 16:34:57,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:57,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-08 16:34:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-08 16:34:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-11-08 16:34:57,787 INFO L87 Difference]: Start difference. First operand 212 states and 242 transitions. Second operand has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:58,001 INFO L93 Difference]: Finished difference Result 255 states and 288 transitions. [2024-11-08 16:34:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:34:58,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-11-08 16:34:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:58,003 INFO L225 Difference]: With dead ends: 255 [2024-11-08 16:34:58,003 INFO L226 Difference]: Without dead ends: 255 [2024-11-08 16:34:58,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-11-08 16:34:58,004 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 21 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:58,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 342 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:34:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-08 16:34:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2024-11-08 16:34:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.1474103585657371) internal successors, (288), 252 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 288 transitions. [2024-11-08 16:34:58,011 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 288 transitions. Word has length 38 [2024-11-08 16:34:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:58,011 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 288 transitions. [2024-11-08 16:34:58,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.9130434782608696) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 288 transitions. [2024-11-08 16:34:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 16:34:58,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:58,012 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:58,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 16:34:58,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 16:34:58,217 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:58,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1036308141, now seen corresponding path program 3 times [2024-11-08 16:34:58,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138489189] [2024-11-08 16:34:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:58,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138489189] [2024-11-08 16:34:58,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138489189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:58,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657832362] [2024-11-08 16:34:58,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:34:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:58,695 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:58,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:34:58,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 16:34:58,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:58,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 16:34:58,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:58,945 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 13 treesize of output 9 [2024-11-08 16:34:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:59,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:59,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:34:59,084 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 16 treesize of output 12 [2024-11-08 16:34:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657832362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:59,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:59,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 27 [2024-11-08 16:34:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120526259] [2024-11-08 16:34:59,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:59,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 16:34:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 16:34:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2024-11-08 16:34:59,161 INFO L87 Difference]: Start difference. First operand 253 states and 288 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:34:59,655 INFO L93 Difference]: Finished difference Result 397 states and 443 transitions. [2024-11-08 16:34:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 16:34:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 16:34:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:34:59,675 INFO L225 Difference]: With dead ends: 397 [2024-11-08 16:34:59,675 INFO L226 Difference]: Without dead ends: 350 [2024-11-08 16:34:59,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 16:34:59,677 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:34:59,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 522 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:34:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-11-08 16:34:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 322. [2024-11-08 16:34:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 320 states have (on average 1.13125) internal successors, (362), 321 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 362 transitions. [2024-11-08 16:34:59,686 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 362 transitions. Word has length 40 [2024-11-08 16:34:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:34:59,686 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 362 transitions. [2024-11-08 16:34:59,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 362 transitions. [2024-11-08 16:34:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 16:34:59,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:34:59,688 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:59,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 16:34:59,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 16:34:59,892 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:34:59,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 960288293, now seen corresponding path program 4 times [2024-11-08 16:34:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:59,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799352113] [2024-11-08 16:34:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:00,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:00,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799352113] [2024-11-08 16:35:00,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799352113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278803226] [2024-11-08 16:35:00,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:35:00,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:00,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:00,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:00,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:35:00,450 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:35:00,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:00,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 16:35:00,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:00,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:01,073 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 [2024-11-08 16:35:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:01,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278803226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:01,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:01,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-11-08 16:35:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656289734] [2024-11-08 16:35:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:01,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 16:35:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 16:35:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2024-11-08 16:35:01,162 INFO L87 Difference]: Start difference. First operand 322 states and 362 transitions. Second operand has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:01,797 INFO L93 Difference]: Finished difference Result 457 states and 509 transitions. [2024-11-08 16:35:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 16:35:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-08 16:35:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:01,800 INFO L225 Difference]: With dead ends: 457 [2024-11-08 16:35:01,800 INFO L226 Difference]: Without dead ends: 457 [2024-11-08 16:35:01,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 16:35:01,801 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:01,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 489 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:35:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-08 16:35:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 347. [2024-11-08 16:35:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 345 states have (on average 1.1333333333333333) internal successors, (391), 346 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 391 transitions. [2024-11-08 16:35:01,815 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 391 transitions. Word has length 44 [2024-11-08 16:35:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:01,815 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 391 transitions. [2024-11-08 16:35:01,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 391 transitions. [2024-11-08 16:35:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 16:35:01,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:01,817 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:01,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 16:35:02,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 16:35:02,021 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:02,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash 700741757, now seen corresponding path program 4 times [2024-11-08 16:35:02,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:02,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012426674] [2024-11-08 16:35:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012426674] [2024-11-08 16:35:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012426674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097280411] [2024-11-08 16:35:02,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:35:02,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:02,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:02,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:02,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:35:02,743 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:35:02,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:02,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-08 16:35:02,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:02,848 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 14 treesize of output 10 [2024-11-08 16:35:04,869 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-08 16:35:04,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-11-08 16:35:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:35:05,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:06,846 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 44 treesize of output 38 [2024-11-08 16:35:06,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-08 16:35:06,866 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 [2024-11-08 16:35:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 16:35:07,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097280411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:07,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 57 [2024-11-08 16:35:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607687222] [2024-11-08 16:35:07,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:07,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 16:35:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 16:35:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2929, Unknown=1, NotChecked=0, Total=3192 [2024-11-08 16:35:07,041 INFO L87 Difference]: Start difference. First operand 347 states and 391 transitions. Second operand has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:11,378 INFO L93 Difference]: Finished difference Result 614 states and 672 transitions. [2024-11-08 16:35:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-08 16:35:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 16:35:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:11,380 INFO L225 Difference]: With dead ends: 614 [2024-11-08 16:35:11,380 INFO L226 Difference]: Without dead ends: 329 [2024-11-08 16:35:11,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=704, Invalid=6777, Unknown=1, NotChecked=0, Total=7482 [2024-11-08 16:35:11,385 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:11,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 647 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1339 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 16:35:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-11-08 16:35:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 202. [2024-11-08 16:35:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.1243781094527363) internal successors, (226), 201 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 226 transitions. [2024-11-08 16:35:11,393 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 226 transitions. Word has length 46 [2024-11-08 16:35:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:11,394 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 226 transitions. [2024-11-08 16:35:11,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 226 transitions. [2024-11-08 16:35:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 16:35:11,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:11,395 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:11,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 16:35:11,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:11,596 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:11,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1721262095, now seen corresponding path program 5 times [2024-11-08 16:35:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:11,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201191086] [2024-11-08 16:35:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:12,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201191086] [2024-11-08 16:35:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201191086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496534458] [2024-11-08 16:35:12,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:35:12,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:12,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:12,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:12,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:35:12,257 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-08 16:35:12,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:12,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 16:35:12,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:12,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:35:12,435 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 14 treesize of output 10 [2024-11-08 16:35:13,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:35:13,087 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 20 treesize of output 15 [2024-11-08 16:35:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:13,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:13,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:13,907 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 16 treesize of output 12 [2024-11-08 16:35:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496534458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:14,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-08 16:35:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117059164] [2024-11-08 16:35:14,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:14,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:35:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:35:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2332, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:35:14,454 INFO L87 Difference]: Start difference. First operand 202 states and 226 transitions. Second operand has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:17,984 INFO L93 Difference]: Finished difference Result 420 states and 459 transitions. [2024-11-08 16:35:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-08 16:35:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-08 16:35:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:17,986 INFO L225 Difference]: With dead ends: 420 [2024-11-08 16:35:17,986 INFO L226 Difference]: Without dead ends: 277 [2024-11-08 16:35:17,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=569, Invalid=5751, Unknown=0, NotChecked=0, Total=6320 [2024-11-08 16:35:17,988 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 180 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:17,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 618 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1055 Invalid, 1 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:35:17,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-08 16:35:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 238. [2024-11-08 16:35:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.1181434599156117) internal successors, (265), 237 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 265 transitions. [2024-11-08 16:35:17,995 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 265 transitions. Word has length 49 [2024-11-08 16:35:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:17,996 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 265 transitions. [2024-11-08 16:35:17,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.7254901960784315) internal successors, (139), 51 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 265 transitions. [2024-11-08 16:35:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 16:35:17,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:17,997 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:18,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:18,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:18,201 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:18,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash -974607587, now seen corresponding path program 6 times [2024-11-08 16:35:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:18,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016859824] [2024-11-08 16:35:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:18,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016859824] [2024-11-08 16:35:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016859824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729494765] [2024-11-08 16:35:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:35:18,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:18,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:18,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:18,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:35:19,104 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-08 16:35:19,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:19,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-08 16:35:19,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:19,487 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 [2024-11-08 16:35:19,527 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 [2024-11-08 16:35:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:35:19,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:35:19,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-08 16:35:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:19,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:20,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:20,015 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 16 treesize of output 12 [2024-11-08 16:35:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:20,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729494765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:20,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:20,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 21] total 47 [2024-11-08 16:35:20,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470247221] [2024-11-08 16:35:20,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:20,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-08 16:35:20,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-08 16:35:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2024-11-08 16:35:20,394 INFO L87 Difference]: Start difference. First operand 238 states and 265 transitions. Second operand has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:22,172 INFO L93 Difference]: Finished difference Result 472 states and 516 transitions. [2024-11-08 16:35:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-08 16:35:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-08 16:35:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:22,174 INFO L225 Difference]: With dead ends: 472 [2024-11-08 16:35:22,174 INFO L226 Difference]: Without dead ends: 293 [2024-11-08 16:35:22,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=437, Invalid=5569, Unknown=0, NotChecked=0, Total=6006 [2024-11-08 16:35:22,176 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 111 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:22,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 896 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:35:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-08 16:35:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 254. [2024-11-08 16:35:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1106719367588933) internal successors, (281), 253 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2024-11-08 16:35:22,182 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 58 [2024-11-08 16:35:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:22,182 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2024-11-08 16:35:22,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.4680851063829787) internal successors, (116), 47 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2024-11-08 16:35:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 16:35:22,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:22,184 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:22,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:22,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:22,388 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:22,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -471153515, now seen corresponding path program 7 times [2024-11-08 16:35:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416747434] [2024-11-08 16:35:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:23,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:23,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416747434] [2024-11-08 16:35:23,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416747434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:23,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662383424] [2024-11-08 16:35:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:35:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:23,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:23,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:23,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:35:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:23,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-08 16:35:23,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:23,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:23,951 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 [2024-11-08 16:35:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:24,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662383424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:24,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:24,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2024-11-08 16:35:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572472228] [2024-11-08 16:35:24,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:24,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 16:35:24,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 16:35:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:35:24,069 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:24,946 INFO L93 Difference]: Finished difference Result 319 states and 349 transitions. [2024-11-08 16:35:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:35:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-08 16:35:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:24,947 INFO L225 Difference]: With dead ends: 319 [2024-11-08 16:35:24,948 INFO L226 Difference]: Without dead ends: 319 [2024-11-08 16:35:24,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=2358, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 16:35:24,949 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 98 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:24,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 795 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:35:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-08 16:35:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 274. [2024-11-08 16:35:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 273 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 304 transitions. [2024-11-08 16:35:24,962 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 304 transitions. Word has length 62 [2024-11-08 16:35:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:24,963 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 304 transitions. [2024-11-08 16:35:24,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 304 transitions. [2024-11-08 16:35:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-08 16:35:24,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:24,964 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:24,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 16:35:25,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:25,168 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:25,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1935488897, now seen corresponding path program 8 times [2024-11-08 16:35:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:25,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855216291] [2024-11-08 16:35:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855216291] [2024-11-08 16:35:25,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855216291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:25,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650850226] [2024-11-08 16:35:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:35:25,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:25,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:25,965 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:25,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:35:26,145 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:35:26,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:26,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-08 16:35:26,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:26,339 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 [2024-11-08 16:35:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:26,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:26,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:26,535 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 16 treesize of output 12 [2024-11-08 16:35:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:26,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650850226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:26,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:26,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 36 [2024-11-08 16:35:26,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487629818] [2024-11-08 16:35:26,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:26,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 16:35:26,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:26,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 16:35:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 16:35:26,651 INFO L87 Difference]: Start difference. First operand 274 states and 304 transitions. Second operand has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:27,575 INFO L93 Difference]: Finished difference Result 503 states and 551 transitions. [2024-11-08 16:35:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-08 16:35:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-08 16:35:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:27,577 INFO L225 Difference]: With dead ends: 503 [2024-11-08 16:35:27,577 INFO L226 Difference]: Without dead ends: 302 [2024-11-08 16:35:27,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=2448, Unknown=0, NotChecked=0, Total=2652 [2024-11-08 16:35:27,578 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 125 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:27,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 952 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 16:35:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-08 16:35:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 290. [2024-11-08 16:35:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.1072664359861593) internal successors, (320), 289 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 320 transitions. [2024-11-08 16:35:27,584 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 320 transitions. Word has length 67 [2024-11-08 16:35:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:27,585 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 320 transitions. [2024-11-08 16:35:27,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 320 transitions. [2024-11-08 16:35:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-08 16:35:27,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:27,586 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:27,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 16:35:27,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:27,790 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:27,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1508621047, now seen corresponding path program 9 times [2024-11-08 16:35:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:27,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557451023] [2024-11-08 16:35:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557451023] [2024-11-08 16:35:28,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557451023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:28,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468450040] [2024-11-08 16:35:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:35:28,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:28,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:28,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:28,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 16:35:28,772 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 16:35:28,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:28,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-08 16:35:28,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:29,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:29,808 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 7 treesize of output 5 [2024-11-08 16:35:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468450040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2024-11-08 16:35:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411999146] [2024-11-08 16:35:29,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:29,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-08 16:35:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-08 16:35:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2024-11-08 16:35:29,977 INFO L87 Difference]: Start difference. First operand 290 states and 320 transitions. Second operand has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:30,971 INFO L93 Difference]: Finished difference Result 364 states and 397 transitions. [2024-11-08 16:35:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-08 16:35:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-08 16:35:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:30,973 INFO L225 Difference]: With dead ends: 364 [2024-11-08 16:35:30,973 INFO L226 Difference]: Without dead ends: 364 [2024-11-08 16:35:30,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=3632, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 16:35:30,974 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:30,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 761 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:35:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-08 16:35:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 310. [2024-11-08 16:35:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.110032362459547) internal successors, (343), 309 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 343 transitions. [2024-11-08 16:35:30,983 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 343 transitions. Word has length 71 [2024-11-08 16:35:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:30,983 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 343 transitions. [2024-11-08 16:35:30,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5714285714285716) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 343 transitions. [2024-11-08 16:35:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-08 16:35:30,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:30,985 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:31,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:31,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:31,189 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:31,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash -719986803, now seen corresponding path program 10 times [2024-11-08 16:35:31,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:31,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505509253] [2024-11-08 16:35:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:31,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:32,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:32,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505509253] [2024-11-08 16:35:32,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505509253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:32,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621948873] [2024-11-08 16:35:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:35:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:32,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:32,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 16:35:32,338 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:35:32,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:32,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-08 16:35:32,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:32,586 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 [2024-11-08 16:35:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:32,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:32,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:32,853 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 16 treesize of output 12 [2024-11-08 16:35:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621948873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:33,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:33,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 39 [2024-11-08 16:35:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255132563] [2024-11-08 16:35:33,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:33,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 16:35:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:33,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 16:35:33,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 16:35:33,004 INFO L87 Difference]: Start difference. First operand 310 states and 343 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:34,164 INFO L93 Difference]: Finished difference Result 568 states and 622 transitions. [2024-11-08 16:35:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 16:35:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-08 16:35:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:34,166 INFO L225 Difference]: With dead ends: 568 [2024-11-08 16:35:34,166 INFO L226 Difference]: Without dead ends: 338 [2024-11-08 16:35:34,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=224, Invalid=2968, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:35:34,167 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 94 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:34,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1234 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 16:35:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-08 16:35:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 326. [2024-11-08 16:35:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1046153846153846) internal successors, (359), 325 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 359 transitions. [2024-11-08 16:35:34,174 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 359 transitions. Word has length 76 [2024-11-08 16:35:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:34,174 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 359 transitions. [2024-11-08 16:35:34,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 359 transitions. [2024-11-08 16:35:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-08 16:35:34,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:34,176 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:34,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 16:35:34,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:34,380 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:34,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1107397381, now seen corresponding path program 11 times [2024-11-08 16:35:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133640665] [2024-11-08 16:35:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:35,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133640665] [2024-11-08 16:35:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133640665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:35,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909613556] [2024-11-08 16:35:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:35:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:35,514 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:35,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 16:35:35,689 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 16:35:35,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:35,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-08 16:35:35,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:35,701 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 [2024-11-08 16:35:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:36,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909613556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:37,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-11-08 16:35:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676383878] [2024-11-08 16:35:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:37,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 16:35:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:37,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 16:35:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2587, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 16:35:37,443 INFO L87 Difference]: Start difference. First operand 326 states and 359 transitions. Second operand has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:38,865 INFO L93 Difference]: Finished difference Result 409 states and 445 transitions. [2024-11-08 16:35:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-08 16:35:38,866 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-11-08 16:35:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:38,871 INFO L225 Difference]: With dead ends: 409 [2024-11-08 16:35:38,871 INFO L226 Difference]: Without dead ends: 409 [2024-11-08 16:35:38,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=588, Invalid=4524, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:35:38,872 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 132 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:38,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 963 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 16:35:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-08 16:35:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 346. [2024-11-08 16:35:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.107246376811594) internal successors, (382), 345 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 382 transitions. [2024-11-08 16:35:38,886 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 382 transitions. Word has length 80 [2024-11-08 16:35:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:38,888 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 382 transitions. [2024-11-08 16:35:38,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.6481481481481484) internal successors, (197), 55 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 382 transitions. [2024-11-08 16:35:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-08 16:35:38,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:38,889 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:38,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 16:35:39,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:39,090 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:39,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash 296810257, now seen corresponding path program 12 times [2024-11-08 16:35:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033769655] [2024-11-08 16:35:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033769655] [2024-11-08 16:35:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033769655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034926742] [2024-11-08 16:35:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:35:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:40,123 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:40,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 16:35:40,374 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 16:35:40,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:40,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-08 16:35:40,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:40,669 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 [2024-11-08 16:35:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:40,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:40,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:40,916 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 16 treesize of output 12 [2024-11-08 16:35:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034926742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:41,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:41,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 42 [2024-11-08 16:35:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444882573] [2024-11-08 16:35:41,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:41,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 16:35:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 16:35:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 16:35:41,022 INFO L87 Difference]: Start difference. First operand 346 states and 382 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:42,249 INFO L93 Difference]: Finished difference Result 633 states and 693 transitions. [2024-11-08 16:35:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 16:35:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-11-08 16:35:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:42,251 INFO L225 Difference]: With dead ends: 633 [2024-11-08 16:35:42,251 INFO L226 Difference]: Without dead ends: 374 [2024-11-08 16:35:42,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2024-11-08 16:35:42,252 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:42,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1510 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:35:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-08 16:35:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 362. [2024-11-08 16:35:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.1024930747922437) internal successors, (398), 361 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 398 transitions. [2024-11-08 16:35:42,259 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 398 transitions. Word has length 85 [2024-11-08 16:35:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:42,259 INFO L471 AbstractCegarLoop]: Abstraction has 362 states and 398 transitions. [2024-11-08 16:35:42,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 398 transitions. [2024-11-08 16:35:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 16:35:42,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:42,265 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:42,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:42,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-08 16:35:42,469 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:42,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1910328679, now seen corresponding path program 13 times [2024-11-08 16:35:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967504844] [2024-11-08 16:35:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967504844] [2024-11-08 16:35:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967504844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404313355] [2024-11-08 16:35:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:35:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:43,435 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:43,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 16:35:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:43,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-08 16:35:43,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:44,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:44,705 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 [2024-11-08 16:35:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:44,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404313355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:44,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:44,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2024-11-08 16:35:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680145875] [2024-11-08 16:35:44,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:44,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 16:35:44,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 16:35:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2287, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 16:35:44,911 INFO L87 Difference]: Start difference. First operand 362 states and 398 transitions. Second operand has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:46,186 INFO L93 Difference]: Finished difference Result 454 states and 493 transitions. [2024-11-08 16:35:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-08 16:35:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-08 16:35:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:46,188 INFO L225 Difference]: With dead ends: 454 [2024-11-08 16:35:46,188 INFO L226 Difference]: Without dead ends: 454 [2024-11-08 16:35:46,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 142 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=495, Invalid=4335, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:35:46,190 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 125 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:46,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1040 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-08 16:35:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-11-08 16:35:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 382. [2024-11-08 16:35:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.10498687664042) internal successors, (421), 381 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 421 transitions. [2024-11-08 16:35:46,205 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 421 transitions. Word has length 89 [2024-11-08 16:35:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:46,206 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 421 transitions. [2024-11-08 16:35:46,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 421 transitions. [2024-11-08 16:35:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-08 16:35:46,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:46,209 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:46,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-08 16:35:46,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-08 16:35:46,410 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:46,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1145213955, now seen corresponding path program 14 times [2024-11-08 16:35:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:46,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150530764] [2024-11-08 16:35:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150530764] [2024-11-08 16:35:47,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150530764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467337783] [2024-11-08 16:35:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:35:47,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:47,527 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:47,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 16:35:47,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:35:47,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:47,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-08 16:35:47,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:48,389 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 [2024-11-08 16:35:48,436 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 [2024-11-08 16:35:48,624 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:35:48,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:35:48,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-08 16:35:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:48,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:49,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:49,034 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 16 treesize of output 12 [2024-11-08 16:35:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467337783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:49,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 29] total 63 [2024-11-08 16:35:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552163987] [2024-11-08 16:35:49,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:49,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:35:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:35:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:35:49,628 INFO L87 Difference]: Start difference. First operand 382 states and 421 transitions. Second operand has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:52,554 INFO L93 Difference]: Finished difference Result 748 states and 816 transitions. [2024-11-08 16:35:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-08 16:35:52,554 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2024-11-08 16:35:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:52,556 INFO L225 Difference]: With dead ends: 748 [2024-11-08 16:35:52,556 INFO L226 Difference]: Without dead ends: 453 [2024-11-08 16:35:52,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=637, Invalid=11353, Unknown=0, NotChecked=0, Total=11990 [2024-11-08 16:35:52,558 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 282 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:52,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1778 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:35:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-08 16:35:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 398. [2024-11-08 16:35:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.1007556675062973) internal successors, (437), 397 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 437 transitions. [2024-11-08 16:35:52,577 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 437 transitions. Word has length 94 [2024-11-08 16:35:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:52,578 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 437 transitions. [2024-11-08 16:35:52,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 437 transitions. [2024-11-08 16:35:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-08 16:35:52,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:52,580 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:52,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:52,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-08 16:35:52,784 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:52,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 454175093, now seen corresponding path program 15 times [2024-11-08 16:35:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:52,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934062139] [2024-11-08 16:35:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:52,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:53,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934062139] [2024-11-08 16:35:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934062139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476683413] [2024-11-08 16:35:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:35:53,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:53,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:53,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 16:35:54,162 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-08 16:35:54,162 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:54,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 16:35:54,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 128 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:54,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:55,750 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 7 treesize of output 5 [2024-11-08 16:35:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 128 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:55,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476683413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:55,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:55,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 64 [2024-11-08 16:35:55,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166509416] [2024-11-08 16:35:55,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:55,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-08 16:35:55,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-08 16:35:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3642, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 16:35:55,999 INFO L87 Difference]: Start difference. First operand 398 states and 437 transitions. Second operand has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:35:57,318 INFO L93 Difference]: Finished difference Result 499 states and 541 transitions. [2024-11-08 16:35:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 16:35:57,319 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-08 16:35:57,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:35:57,320 INFO L225 Difference]: With dead ends: 499 [2024-11-08 16:35:57,320 INFO L226 Difference]: Without dead ends: 499 [2024-11-08 16:35:57,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=916, Invalid=6394, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:35:57,322 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 298 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:35:57,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 962 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-08 16:35:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-11-08 16:35:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 418. [2024-11-08 16:35:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.1031175059952039) internal successors, (460), 417 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 460 transitions. [2024-11-08 16:35:57,331 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 460 transitions. Word has length 98 [2024-11-08 16:35:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:35:57,332 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 460 transitions. [2024-11-08 16:35:57,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.8125) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:35:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 460 transitions. [2024-11-08 16:35:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-08 16:35:57,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:35:57,333 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:35:57,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 16:35:57,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-08 16:35:57,534 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:35:57,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:35:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1083056479, now seen corresponding path program 16 times [2024-11-08 16:35:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:35:57,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109802700] [2024-11-08 16:35:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:35:57,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:35:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:35:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:35:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109802700] [2024-11-08 16:35:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109802700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:35:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734863245] [2024-11-08 16:35:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:35:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:35:58,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:35:58,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:35:58,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 16:35:58,893 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:35:58,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:35:58,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-08 16:35:58,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:35:59,233 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 [2024-11-08 16:35:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:59,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:35:59,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:35:59,503 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 16 treesize of output 12 [2024-11-08 16:35:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:35:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734863245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:35:59,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:35:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 48 [2024-11-08 16:35:59,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173131334] [2024-11-08 16:35:59,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:35:59,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 16:35:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:35:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 16:35:59,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2120, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 16:35:59,635 INFO L87 Difference]: Start difference. First operand 418 states and 460 transitions. Second operand has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:01,388 INFO L93 Difference]: Finished difference Result 763 states and 835 transitions. [2024-11-08 16:36:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-08 16:36:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-08 16:36:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:01,390 INFO L225 Difference]: With dead ends: 763 [2024-11-08 16:36:01,390 INFO L226 Difference]: Without dead ends: 446 [2024-11-08 16:36:01,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=284, Invalid=4828, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:36:01,391 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 193 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:01,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2390 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:36:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-08 16:36:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 434. [2024-11-08 16:36:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.0993071593533488) internal successors, (476), 433 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 476 transitions. [2024-11-08 16:36:01,398 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 476 transitions. Word has length 103 [2024-11-08 16:36:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:01,399 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 476 transitions. [2024-11-08 16:36:01,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2708333333333335) internal successors, (157), 48 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:01,399 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 476 transitions. [2024-11-08 16:36:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-08 16:36:01,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:01,401 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:01,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 16:36:01,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-08 16:36:01,601 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:01,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 428787753, now seen corresponding path program 17 times [2024-11-08 16:36:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843127817] [2024-11-08 16:36:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:03,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843127817] [2024-11-08 16:36:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843127817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630929360] [2024-11-08 16:36:03,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:36:03,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:03,018 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:03,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 16:36:03,293 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-08 16:36:03,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:03,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-08 16:36:03,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:03,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:36:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:04,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:05,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630929360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:05,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:05,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 69 [2024-11-08 16:36:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284591263] [2024-11-08 16:36:05,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:05,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-08 16:36:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-08 16:36:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=4207, Unknown=0, NotChecked=0, Total=4830 [2024-11-08 16:36:05,690 INFO L87 Difference]: Start difference. First operand 434 states and 476 transitions. Second operand has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:07,644 INFO L93 Difference]: Finished difference Result 544 states and 589 transitions. [2024-11-08 16:36:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-08 16:36:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-08 16:36:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:07,646 INFO L225 Difference]: With dead ends: 544 [2024-11-08 16:36:07,646 INFO L226 Difference]: Without dead ends: 544 [2024-11-08 16:36:07,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=936, Invalid=7620, Unknown=0, NotChecked=0, Total=8556 [2024-11-08 16:36:07,647 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 253 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 2256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:07,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1493 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2256 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 16:36:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-11-08 16:36:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 454. [2024-11-08 16:36:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.1015452538631347) internal successors, (499), 453 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 499 transitions. [2024-11-08 16:36:07,657 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 499 transitions. Word has length 107 [2024-11-08 16:36:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:07,658 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 499 transitions. [2024-11-08 16:36:07,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8115942028985508) internal successors, (263), 70 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 499 transitions. [2024-11-08 16:36:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-08 16:36:07,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:07,660 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:07,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 16:36:07,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-08 16:36:07,864 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:07,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1062228077, now seen corresponding path program 18 times [2024-11-08 16:36:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637121746] [2024-11-08 16:36:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637121746] [2024-11-08 16:36:09,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637121746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:09,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365513134] [2024-11-08 16:36:09,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:36:09,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:09,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:09,210 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:09,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 16:36:09,561 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-08 16:36:09,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:09,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-11-08 16:36:09,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:10,299 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 [2024-11-08 16:36:10,343 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 [2024-11-08 16:36:10,547 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:36:10,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:36:10,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-08 16:36:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:10,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:11,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:36:11,041 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 16 treesize of output 12 [2024-11-08 16:36:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:11,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365513134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:11,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:11,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 33] total 71 [2024-11-08 16:36:11,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768195705] [2024-11-08 16:36:11,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:11,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-08 16:36:11,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-08 16:36:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4730, Unknown=0, NotChecked=0, Total=4970 [2024-11-08 16:36:11,847 INFO L87 Difference]: Start difference. First operand 454 states and 499 transitions. Second operand has 71 states, 71 states have (on average 3.0704225352112675) internal successors, (218), 71 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:15,954 INFO L93 Difference]: Finished difference Result 886 states and 966 transitions. [2024-11-08 16:36:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 16:36:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0704225352112675) internal successors, (218), 71 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-11-08 16:36:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:15,956 INFO L225 Difference]: With dead ends: 886 [2024-11-08 16:36:15,956 INFO L226 Difference]: Without dead ends: 533 [2024-11-08 16:36:15,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3559 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=737, Invalid=15013, Unknown=0, NotChecked=0, Total=15750 [2024-11-08 16:36:15,958 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 337 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:15,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2878 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3935 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-08 16:36:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-11-08 16:36:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 470. [2024-11-08 16:36:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.0980810234541578) internal successors, (515), 469 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 515 transitions. [2024-11-08 16:36:15,967 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 515 transitions. Word has length 112 [2024-11-08 16:36:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:15,967 INFO L471 AbstractCegarLoop]: Abstraction has 470 states and 515 transitions. [2024-11-08 16:36:15,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0704225352112675) internal successors, (218), 71 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 515 transitions. [2024-11-08 16:36:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-08 16:36:15,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:15,969 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:15,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-08 16:36:16,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:16,170 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:16,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 598581221, now seen corresponding path program 19 times [2024-11-08 16:36:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:16,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855966357] [2024-11-08 16:36:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:17,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855966357] [2024-11-08 16:36:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855966357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433573815] [2024-11-08 16:36:17,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:36:17,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:17,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:17,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:17,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 16:36:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:17,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-08 16:36:17,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:18,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:19,017 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 [2024-11-08 16:36:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:19,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433573815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:19,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:19,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2024-11-08 16:36:19,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475175944] [2024-11-08 16:36:19,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:19,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-08 16:36:19,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-08 16:36:19,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3498, Unknown=0, NotChecked=0, Total=3906 [2024-11-08 16:36:19,344 INFO L87 Difference]: Start difference. First operand 470 states and 515 transitions. Second operand has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:21,340 INFO L93 Difference]: Finished difference Result 589 states and 637 transitions. [2024-11-08 16:36:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-08 16:36:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-11-08 16:36:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:21,342 INFO L225 Difference]: With dead ends: 589 [2024-11-08 16:36:21,342 INFO L226 Difference]: Without dead ends: 589 [2024-11-08 16:36:21,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 187 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=751, Invalid=6905, Unknown=0, NotChecked=0, Total=7656 [2024-11-08 16:36:21,343 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 170 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:21,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1720 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-08 16:36:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2024-11-08 16:36:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 490. [2024-11-08 16:36:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.100204498977505) internal successors, (538), 489 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 538 transitions. [2024-11-08 16:36:21,352 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 538 transitions. Word has length 116 [2024-11-08 16:36:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:21,353 INFO L471 AbstractCegarLoop]: Abstraction has 490 states and 538 transitions. [2024-11-08 16:36:21,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 538 transitions. [2024-11-08 16:36:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-08 16:36:21,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:21,355 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:21,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-08 16:36:21,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-08 16:36:21,556 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:21,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -89199055, now seen corresponding path program 20 times [2024-11-08 16:36:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:21,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332168495] [2024-11-08 16:36:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332168495] [2024-11-08 16:36:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332168495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120997194] [2024-11-08 16:36:22,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:36:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:22,999 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:23,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 16:36:23,206 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:36:23,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:23,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-08 16:36:23,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:24,011 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 [2024-11-08 16:36:24,059 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 [2024-11-08 16:36:24,269 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:36:24,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:36:24,272 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 15 treesize of output 10 [2024-11-08 16:36:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:24,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:24,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:36:24,776 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 16 treesize of output 12 [2024-11-08 16:36:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120997194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:25,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 35] total 75 [2024-11-08 16:36:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287044753] [2024-11-08 16:36:25,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:25,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:36:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:36:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=5297, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:36:25,588 INFO L87 Difference]: Start difference. First operand 490 states and 538 transitions. Second operand has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 75 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:30,166 INFO L93 Difference]: Finished difference Result 955 states and 1041 transitions. [2024-11-08 16:36:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-08 16:36:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 75 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2024-11-08 16:36:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:30,168 INFO L225 Difference]: With dead ends: 955 [2024-11-08 16:36:30,168 INFO L226 Difference]: Without dead ends: 573 [2024-11-08 16:36:30,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4043 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=787, Invalid=17035, Unknown=0, NotChecked=0, Total=17822 [2024-11-08 16:36:30,170 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 358 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2711 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:30,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 2711 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4253 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-08 16:36:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-11-08 16:36:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2024-11-08 16:36:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.0970297029702971) internal successors, (554), 505 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 554 transitions. [2024-11-08 16:36:30,178 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 554 transitions. Word has length 121 [2024-11-08 16:36:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:30,178 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 554 transitions. [2024-11-08 16:36:30,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.1333333333333333) internal successors, (235), 75 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 554 transitions. [2024-11-08 16:36:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-08 16:36:30,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:30,181 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:30,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-08 16:36:30,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-08 16:36:30,381 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:30,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -616069703, now seen corresponding path program 21 times [2024-11-08 16:36:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:30,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301089314] [2024-11-08 16:36:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:31,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301089314] [2024-11-08 16:36:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301089314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568482217] [2024-11-08 16:36:31,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:36:31,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:31,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:31,741 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:31,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 16:36:32,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-08 16:36:32,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:32,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-08 16:36:32,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 242 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:33,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:34,355 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 7 treesize of output 5 [2024-11-08 16:36:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 242 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:34,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568482217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:34,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:34,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 79 [2024-11-08 16:36:34,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670354862] [2024-11-08 16:36:34,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:34,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-08 16:36:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:34,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-08 16:36:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=5506, Unknown=0, NotChecked=0, Total=6320 [2024-11-08 16:36:34,721 INFO L87 Difference]: Start difference. First operand 506 states and 554 transitions. Second operand has 80 states, 79 states have (on average 3.962025316455696) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:36,649 INFO L93 Difference]: Finished difference Result 634 states and 685 transitions. [2024-11-08 16:36:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 16:36:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.962025316455696) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2024-11-08 16:36:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:36,653 INFO L225 Difference]: With dead ends: 634 [2024-11-08 16:36:36,653 INFO L226 Difference]: Without dead ends: 634 [2024-11-08 16:36:36,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 189 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4329 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1410, Invalid=9932, Unknown=0, NotChecked=0, Total=11342 [2024-11-08 16:36:36,655 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 300 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:36,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1521 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 16:36:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2024-11-08 16:36:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 526. [2024-11-08 16:36:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.099047619047619) internal successors, (577), 525 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 577 transitions. [2024-11-08 16:36:36,666 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 577 transitions. Word has length 125 [2024-11-08 16:36:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:36,667 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 577 transitions. [2024-11-08 16:36:36,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.962025316455696) internal successors, (313), 80 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 577 transitions. [2024-11-08 16:36:36,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-08 16:36:36,669 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:36,669 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:36,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-08 16:36:36,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-08 16:36:36,870 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:36,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1245678813, now seen corresponding path program 22 times [2024-11-08 16:36:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604652631] [2024-11-08 16:36:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604652631] [2024-11-08 16:36:38,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604652631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638131110] [2024-11-08 16:36:38,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:36:38,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:38,212 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:38,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-08 16:36:38,447 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:36:38,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:38,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-11-08 16:36:38,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:38,960 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 [2024-11-08 16:36:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:39,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:39,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:36:39,323 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 16 treesize of output 12 [2024-11-08 16:36:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:39,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638131110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:39,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:39,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 57 [2024-11-08 16:36:39,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326883471] [2024-11-08 16:36:39,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:39,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 16:36:39,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:39,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 16:36:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3032, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 16:36:39,474 INFO L87 Difference]: Start difference. First operand 526 states and 577 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:41,994 INFO L93 Difference]: Finished difference Result 958 states and 1048 transitions. [2024-11-08 16:36:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-08 16:36:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-08 16:36:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:41,996 INFO L225 Difference]: With dead ends: 958 [2024-11-08 16:36:41,996 INFO L226 Difference]: Without dead ends: 554 [2024-11-08 16:36:41,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=344, Invalid=7138, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 16:36:41,998 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 238 mSDsluCounter, 3251 mSDsCounter, 0 mSdLazyCounter, 3917 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:41,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 3340 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3917 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 16:36:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-11-08 16:36:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 542. [2024-11-08 16:36:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.0961182994454715) internal successors, (593), 541 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 593 transitions. [2024-11-08 16:36:42,006 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 593 transitions. Word has length 130 [2024-11-08 16:36:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:42,007 INFO L471 AbstractCegarLoop]: Abstraction has 542 states and 593 transitions. [2024-11-08 16:36:42,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 593 transitions. [2024-11-08 16:36:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-08 16:36:42,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:42,009 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:42,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-08 16:36:42,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-08 16:36:42,210 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:42,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1385894315, now seen corresponding path program 23 times [2024-11-08 16:36:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:42,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719126182] [2024-11-08 16:36:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:42,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 231 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:43,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719126182] [2024-11-08 16:36:43,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719126182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907135067] [2024-11-08 16:36:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:36:43,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:43,772 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-08 16:36:44,077 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-08 16:36:44,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:44,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-08 16:36:44,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:44,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:36:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:45,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 276 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:47,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907135067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:47,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:47,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 84 [2024-11-08 16:36:47,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003623464] [2024-11-08 16:36:47,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:47,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-08 16:36:47,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-08 16:36:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=928, Invalid=6212, Unknown=0, NotChecked=0, Total=7140 [2024-11-08 16:36:47,214 INFO L87 Difference]: Start difference. First operand 542 states and 593 transitions. Second operand has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:49,804 INFO L93 Difference]: Finished difference Result 679 states and 733 transitions. [2024-11-08 16:36:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-08 16:36:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-11-08 16:36:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:49,806 INFO L225 Difference]: With dead ends: 679 [2024-11-08 16:36:49,806 INFO L226 Difference]: Without dead ends: 679 [2024-11-08 16:36:49,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1367, Invalid=11515, Unknown=0, NotChecked=0, Total=12882 [2024-11-08 16:36:49,807 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 364 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:49,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1844 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 16:36:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-08 16:36:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 562. [2024-11-08 16:36:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 1.0980392156862746) internal successors, (616), 561 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 616 transitions. [2024-11-08 16:36:49,819 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 616 transitions. Word has length 134 [2024-11-08 16:36:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:49,819 INFO L471 AbstractCegarLoop]: Abstraction has 562 states and 616 transitions. [2024-11-08 16:36:49,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.9166666666666665) internal successors, (329), 85 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 616 transitions. [2024-11-08 16:36:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-08 16:36:49,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:49,822 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:49,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-08 16:36:50,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-08 16:36:50,022 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:50,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash -998824511, now seen corresponding path program 24 times [2024-11-08 16:36:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:50,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120034865] [2024-11-08 16:36:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:50,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:51,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:51,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120034865] [2024-11-08 16:36:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120034865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726007929] [2024-11-08 16:36:51,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:36:51,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:51,864 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:51,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-08 16:36:52,834 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-08 16:36:52,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:36:52,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-08 16:36:52,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:53,409 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 [2024-11-08 16:36:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:53,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:36:53,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:36:53,776 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 16 treesize of output 12 [2024-11-08 16:36:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 28 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:53,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726007929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:36:53,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:36:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 60 [2024-11-08 16:36:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857168019] [2024-11-08 16:36:53,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:36:53,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-08 16:36:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:36:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-08 16:36:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3372, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 16:36:53,939 INFO L87 Difference]: Start difference. First operand 562 states and 616 transitions. Second operand has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:36:56,845 INFO L93 Difference]: Finished difference Result 1023 states and 1119 transitions. [2024-11-08 16:36:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-08 16:36:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-11-08 16:36:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:36:56,848 INFO L225 Difference]: With dead ends: 1023 [2024-11-08 16:36:56,848 INFO L226 Difference]: Without dead ends: 590 [2024-11-08 16:36:56,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=364, Invalid=8008, Unknown=0, NotChecked=0, Total=8372 [2024-11-08 16:36:56,849 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 171 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 4436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 3699 SdHoareTripleChecker+Invalid, 4450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:36:56,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 3699 Invalid, 4450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4436 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 16:36:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2024-11-08 16:36:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 578. [2024-11-08 16:36:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.0953206239168112) internal successors, (632), 577 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 632 transitions. [2024-11-08 16:36:56,857 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 632 transitions. Word has length 139 [2024-11-08 16:36:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:36:56,858 INFO L471 AbstractCegarLoop]: Abstraction has 578 states and 632 transitions. [2024-11-08 16:36:56,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:36:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 632 transitions. [2024-11-08 16:36:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-08 16:36:56,860 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:36:56,861 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:36:56,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-08 16:36:57,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-08 16:36:57,061 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:36:57,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:36:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1899752265, now seen corresponding path program 25 times [2024-11-08 16:36:57,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:36:57,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351882628] [2024-11-08 16:36:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:36:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:36:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 276 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:36:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351882628] [2024-11-08 16:36:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351882628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:36:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126152916] [2024-11-08 16:36:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:36:58,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:36:58,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:36:58,539 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:36:58,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-08 16:36:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:36:58,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-08 16:36:58,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:36:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:36:59,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:37:00,869 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 [2024-11-08 16:37:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 325 proven. 536 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126152916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:37:01,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:37:01,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 74 [2024-11-08 16:37:01,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457542106] [2024-11-08 16:37:01,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:37:01,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:37:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:37:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:37:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=4963, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:37:01,354 INFO L87 Difference]: Start difference. First operand 578 states and 632 transitions. Second operand has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:04,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:37:04,043 INFO L93 Difference]: Finished difference Result 724 states and 781 transitions. [2024-11-08 16:37:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-08 16:37:04,044 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-11-08 16:37:04,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:37:04,047 INFO L225 Difference]: With dead ends: 724 [2024-11-08 16:37:04,047 INFO L226 Difference]: Without dead ends: 724 [2024-11-08 16:37:04,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 232 SyntacticMatches, 15 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1059, Invalid=10071, Unknown=0, NotChecked=0, Total=11130 [2024-11-08 16:37:04,048 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 392 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 3281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 3281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:37:04,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2016 Invalid, 3281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3281 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-08 16:37:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2024-11-08 16:37:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 598. [2024-11-08 16:37:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0971524288107202) internal successors, (655), 597 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 655 transitions. [2024-11-08 16:37:04,058 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 655 transitions. Word has length 143 [2024-11-08 16:37:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:37:04,058 INFO L471 AbstractCegarLoop]: Abstraction has 598 states and 655 transitions. [2024-11-08 16:37:04,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.9054054054054053) internal successors, (289), 75 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 655 transitions. [2024-11-08 16:37:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-08 16:37:04,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:37:04,061 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:37:04,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-08 16:37:04,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:37:04,262 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:37:04,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:37:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1677975219, now seen corresponding path program 26 times [2024-11-08 16:37:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:37:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932924116] [2024-11-08 16:37:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:37:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:37:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:37:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 30 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:06,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:37:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932924116] [2024-11-08 16:37:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932924116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:37:06,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795643917] [2024-11-08 16:37:06,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:37:06,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:37:06,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:37:06,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:37:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-08 16:37:06,339 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:37:06,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:37:06,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-08 16:37:06,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:37:06,352 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 [2024-11-08 16:37:07,056 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 14 treesize of output 10 [2024-11-08 16:37:09,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:37:09,943 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 20 treesize of output 17 [2024-11-08 16:37:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 325 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:10,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:37:13,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:37:13,385 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 24 treesize of output 20 [2024-11-08 16:37:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 325 proven. 608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:15,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795643917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:37:15,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:37:15,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 117 [2024-11-08 16:37:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796539907] [2024-11-08 16:37:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:37:15,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-08 16:37:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:37:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-08 16:37:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=12613, Unknown=0, NotChecked=0, Total=13572 [2024-11-08 16:37:15,109 INFO L87 Difference]: Start difference. First operand 598 states and 655 transitions. Second operand has 117 states, 117 states have (on average 3.7094017094017095) internal successors, (434), 117 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:37:32,425 INFO L93 Difference]: Finished difference Result 1234 states and 1339 transitions. [2024-11-08 16:37:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-08 16:37:32,425 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.7094017094017095) internal successors, (434), 117 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-11-08 16:37:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:37:32,427 INFO L225 Difference]: With dead ends: 1234 [2024-11-08 16:37:32,427 INFO L226 Difference]: Without dead ends: 772 [2024-11-08 16:37:32,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2289, Invalid=33621, Unknown=0, NotChecked=0, Total=35910 [2024-11-08 16:37:32,429 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 1116 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 6092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:37:32,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 3148 Invalid, 6092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6071 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-11-08 16:37:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2024-11-08 16:37:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 634. [2024-11-08 16:37:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.0963665086887835) internal successors, (694), 633 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 694 transitions. [2024-11-08 16:37:32,439 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 694 transitions. Word has length 148 [2024-11-08 16:37:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:37:32,439 INFO L471 AbstractCegarLoop]: Abstraction has 634 states and 694 transitions. [2024-11-08 16:37:32,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.7094017094017095) internal successors, (434), 117 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 694 transitions. [2024-11-08 16:37:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-08 16:37:32,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:37:32,443 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:37:32,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-08 16:37:32,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:37:32,643 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:37:32,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:37:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash -254180015, now seen corresponding path program 27 times [2024-11-08 16:37:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:37:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248801238] [2024-11-08 16:37:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:37:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:37:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:37:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 32 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:37:34,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248801238] [2024-11-08 16:37:34,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248801238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:37:34,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76802011] [2024-11-08 16:37:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:37:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:37:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:37:34,936 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:37:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-08 16:37:35,803 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-08 16:37:35,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:37:35,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-11-08 16:37:35,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:37:37,067 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 [2024-11-08 16:37:37,130 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 [2024-11-08 16:37:37,398 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:37:37,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:37:37,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-11-08 16:37:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:39,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:37:40,871 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 17 [2024-11-08 16:37:40,875 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 28 treesize of output 24 [2024-11-08 16:37:41,029 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 13 treesize of output 11 [2024-11-08 16:37:41,033 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 22 treesize of output 20 [2024-11-08 16:37:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:37:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76802011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:37:44,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:37:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46, 46] total 130 [2024-11-08 16:37:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663311374] [2024-11-08 16:37:44,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:37:44,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-11-08 16:37:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:37:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-11-08 16:37:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=16350, Unknown=0, NotChecked=0, Total=16770 [2024-11-08 16:37:44,100 INFO L87 Difference]: Start difference. First operand 634 states and 694 transitions. Second operand has 130 states, 130 states have (on average 3.5384615384615383) internal successors, (460), 130 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:37:57,851 INFO L93 Difference]: Finished difference Result 1310 states and 1419 transitions. [2024-11-08 16:37:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-08 16:37:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.5384615384615383) internal successors, (460), 130 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2024-11-08 16:37:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:37:57,853 INFO L225 Difference]: With dead ends: 1310 [2024-11-08 16:37:57,853 INFO L226 Difference]: Without dead ends: 733 [2024-11-08 16:37:57,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13744 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1201, Invalid=49649, Unknown=0, NotChecked=0, Total=50850 [2024-11-08 16:37:57,856 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 341 mSDsluCounter, 5844 mSDsCounter, 0 mSdLazyCounter, 11856 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 5931 SdHoareTripleChecker+Invalid, 11889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 11856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:37:57,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 5931 Invalid, 11889 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 11856 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-08 16:37:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2024-11-08 16:37:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 650. [2024-11-08 16:37:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.0939907550077042) internal successors, (710), 649 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 710 transitions. [2024-11-08 16:37:57,861 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 710 transitions. Word has length 157 [2024-11-08 16:37:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:37:57,861 INFO L471 AbstractCegarLoop]: Abstraction has 650 states and 710 transitions. [2024-11-08 16:37:57,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.5384615384615383) internal successors, (460), 130 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:37:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 710 transitions. [2024-11-08 16:37:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-08 16:37:57,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:37:57,863 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:37:57,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-08 16:37:58,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:37:58,064 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:37:58,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:37:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash -732235559, now seen corresponding path program 28 times [2024-11-08 16:37:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:37:58,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148895847] [2024-11-08 16:37:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:37:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:37:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 378 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:00,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:00,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148895847] [2024-11-08 16:38:00,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148895847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:00,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045832377] [2024-11-08 16:38:00,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:38:00,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:00,467 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:00,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-08 16:38:00,780 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:38:00,781 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:38:00,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-08 16:38:00,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:02,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:03,649 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 [2024-11-08 16:38:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 435 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:04,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045832377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:04,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:04,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 82 [2024-11-08 16:38:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951981439] [2024-11-08 16:38:04,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:04,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-08 16:38:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-08 16:38:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=6080, Unknown=0, NotChecked=0, Total=6806 [2024-11-08 16:38:04,314 INFO L87 Difference]: Start difference. First operand 650 states and 710 transitions. Second operand has 83 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 83 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:38:07,879 INFO L93 Difference]: Finished difference Result 814 states and 877 transitions. [2024-11-08 16:38:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-08 16:38:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 83 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2024-11-08 16:38:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:38:07,881 INFO L225 Difference]: With dead ends: 814 [2024-11-08 16:38:07,881 INFO L226 Difference]: Without dead ends: 814 [2024-11-08 16:38:07,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 262 SyntacticMatches, 17 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5257 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1294, Invalid=12512, Unknown=0, NotChecked=0, Total=13806 [2024-11-08 16:38:07,883 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 428 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 4400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:38:07,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 2833 Invalid, 4400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-08 16:38:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2024-11-08 16:38:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 670. [2024-11-08 16:38:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.0956651718983557) internal successors, (733), 669 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 733 transitions. [2024-11-08 16:38:07,891 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 733 transitions. Word has length 161 [2024-11-08 16:38:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:38:07,892 INFO L471 AbstractCegarLoop]: Abstraction has 670 states and 733 transitions. [2024-11-08 16:38:07,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.9634146341463414) internal successors, (325), 83 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 733 transitions. [2024-11-08 16:38:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-08 16:38:07,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:38:07,894 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:38:07,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-08 16:38:08,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:08,095 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:38:08,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:38:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2029456829, now seen corresponding path program 29 times [2024-11-08 16:38:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:38:08,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322617742] [2024-11-08 16:38:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:38:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:38:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 34 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:10,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:10,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322617742] [2024-11-08 16:38:10,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322617742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253600372] [2024-11-08 16:38:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:38:10,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:10,366 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:10,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-08 16:38:10,831 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-11-08 16:38:10,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:38:10,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-11-08 16:38:10,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:11,654 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 [2024-11-08 16:38:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 34 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:11,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:12,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:38:12,073 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 16 treesize of output 12 [2024-11-08 16:38:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 34 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:12,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253600372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:12,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:12,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 69 [2024-11-08 16:38:12,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439063525] [2024-11-08 16:38:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:12,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-08 16:38:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-08 16:38:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4500, Unknown=0, NotChecked=0, Total=4692 [2024-11-08 16:38:12,263 INFO L87 Difference]: Start difference. First operand 670 states and 733 transitions. Second operand has 69 states, 69 states have (on average 3.5942028985507246) internal successors, (248), 69 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:38:16,494 INFO L93 Difference]: Finished difference Result 1218 states and 1332 transitions. [2024-11-08 16:38:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-08 16:38:16,494 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.5942028985507246) internal successors, (248), 69 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-11-08 16:38:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:38:16,496 INFO L225 Difference]: With dead ends: 1218 [2024-11-08 16:38:16,496 INFO L226 Difference]: Without dead ends: 698 [2024-11-08 16:38:16,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=424, Invalid=10918, Unknown=0, NotChecked=0, Total=11342 [2024-11-08 16:38:16,497 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 306 mSDsluCounter, 5451 mSDsCounter, 0 mSdLazyCounter, 6386 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 5564 SdHoareTripleChecker+Invalid, 6402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 6386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:38:16,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 5564 Invalid, 6402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 6386 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-08 16:38:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2024-11-08 16:38:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 686. [2024-11-08 16:38:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.0934306569343066) internal successors, (749), 685 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 749 transitions. [2024-11-08 16:38:16,502 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 749 transitions. Word has length 166 [2024-11-08 16:38:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:38:16,502 INFO L471 AbstractCegarLoop]: Abstraction has 686 states and 749 transitions. [2024-11-08 16:38:16,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.5942028985507246) internal successors, (248), 69 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 749 transitions. [2024-11-08 16:38:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-08 16:38:16,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:38:16,504 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:38:16,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-08 16:38:16,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-08 16:38:16,704 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:38:16,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:38:16,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1150610635, now seen corresponding path program 30 times [2024-11-08 16:38:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:38:16,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023195960] [2024-11-08 16:38:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:38:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:38:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 435 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023195960] [2024-11-08 16:38:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023195960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345233766] [2024-11-08 16:38:18,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:38:18,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:18,682 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:18,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-08 16:38:20,487 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-08 16:38:20,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:38:20,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-08 16:38:20,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 512 proven. 763 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:22,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:24,210 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 7 treesize of output 5 [2024-11-08 16:38:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 512 proven. 763 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:24,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345233766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:24,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 104 [2024-11-08 16:38:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177422112] [2024-11-08 16:38:24,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:24,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-08 16:38:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-08 16:38:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1469, Invalid=9451, Unknown=0, NotChecked=0, Total=10920 [2024-11-08 16:38:24,880 INFO L87 Difference]: Start difference. First operand 686 states and 749 transitions. Second operand has 105 states, 104 states have (on average 4.115384615384615) internal successors, (428), 105 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:38:28,387 INFO L93 Difference]: Finished difference Result 859 states and 925 transitions. [2024-11-08 16:38:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-08 16:38:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 4.115384615384615) internal successors, (428), 105 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2024-11-08 16:38:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:38:28,391 INFO L225 Difference]: With dead ends: 859 [2024-11-08 16:38:28,391 INFO L226 Difference]: Without dead ends: 859 [2024-11-08 16:38:28,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 259 SyntacticMatches, 18 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7929 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2475, Invalid=17547, Unknown=0, NotChecked=0, Total=20022 [2024-11-08 16:38:28,392 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 498 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 2988 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:38:28,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 2115 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2988 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-08 16:38:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2024-11-08 16:38:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 706. [2024-11-08 16:38:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.0950354609929078) internal successors, (772), 705 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 772 transitions. [2024-11-08 16:38:28,401 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 772 transitions. Word has length 170 [2024-11-08 16:38:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:38:28,401 INFO L471 AbstractCegarLoop]: Abstraction has 706 states and 772 transitions. [2024-11-08 16:38:28,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 4.115384615384615) internal successors, (428), 105 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 772 transitions. [2024-11-08 16:38:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-08 16:38:28,403 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:38:28,403 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:38:28,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-08 16:38:28,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:28,604 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:38:28,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:38:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1994722529, now seen corresponding path program 31 times [2024-11-08 16:38:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:38:28,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726610842] [2024-11-08 16:38:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:38:28,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:38:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 36 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726610842] [2024-11-08 16:38:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726610842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041009961] [2024-11-08 16:38:31,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:38:31,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:31,416 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:31,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-08 16:38:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:31,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-11-08 16:38:31,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:32,904 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 [2024-11-08 16:38:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 36 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:33,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:33,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:38:33,464 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 16 treesize of output 12 [2024-11-08 16:38:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 36 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041009961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:33,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 45, 45] total 72 [2024-11-08 16:38:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968681899] [2024-11-08 16:38:33,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:33,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-08 16:38:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-08 16:38:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4912, Unknown=0, NotChecked=0, Total=5112 [2024-11-08 16:38:33,699 INFO L87 Difference]: Start difference. First operand 706 states and 772 transitions. Second operand has 72 states, 72 states have (on average 3.625) internal successors, (261), 72 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:38:38,977 INFO L93 Difference]: Finished difference Result 1283 states and 1403 transitions. [2024-11-08 16:38:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-08 16:38:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.625) internal successors, (261), 72 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2024-11-08 16:38:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:38:38,979 INFO L225 Difference]: With dead ends: 1283 [2024-11-08 16:38:38,979 INFO L226 Difference]: Without dead ends: 734 [2024-11-08 16:38:38,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=444, Invalid=11988, Unknown=0, NotChecked=0, Total=12432 [2024-11-08 16:38:38,980 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 320 mSDsluCounter, 6001 mSDsCounter, 0 mSdLazyCounter, 7255 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 6120 SdHoareTripleChecker+Invalid, 7272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 7255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:38:38,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 6120 Invalid, 7272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 7255 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-08 16:38:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2024-11-08 16:38:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 722. [2024-11-08 16:38:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.0929264909847434) internal successors, (788), 721 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 788 transitions. [2024-11-08 16:38:38,991 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 788 transitions. Word has length 175 [2024-11-08 16:38:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:38:38,992 INFO L471 AbstractCegarLoop]: Abstraction has 722 states and 788 transitions. [2024-11-08 16:38:38,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.625) internal successors, (261), 72 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 788 transitions. [2024-11-08 16:38:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-08 16:38:38,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:38:38,994 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:38:39,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-08 16:38:39,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:39,195 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:38:39,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:38:39,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1466716567, now seen corresponding path program 32 times [2024-11-08 16:38:39,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:38:39,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399009946] [2024-11-08 16:38:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:38:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:38:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 496 proven. 935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399009946] [2024-11-08 16:38:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399009946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037707791] [2024-11-08 16:38:41,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:38:41,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:41,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:41,812 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:41,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-08 16:38:42,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:38:42,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:38:42,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-08 16:38:42,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:43,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:45,721 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 [2024-11-08 16:38:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 561 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:46,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037707791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:46,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:46,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 90 [2024-11-08 16:38:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995261622] [2024-11-08 16:38:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:46,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-08 16:38:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-08 16:38:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=7307, Unknown=0, NotChecked=0, Total=8190 [2024-11-08 16:38:46,567 INFO L87 Difference]: Start difference. First operand 722 states and 788 transitions. Second operand has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:38:51,855 INFO L93 Difference]: Finished difference Result 904 states and 973 transitions. [2024-11-08 16:38:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-08 16:38:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2024-11-08 16:38:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:38:51,859 INFO L225 Difference]: With dead ends: 904 [2024-11-08 16:38:51,859 INFO L226 Difference]: Without dead ends: 904 [2024-11-08 16:38:51,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 292 SyntacticMatches, 19 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6605 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1555, Invalid=15215, Unknown=0, NotChecked=0, Total=16770 [2024-11-08 16:38:51,862 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 431 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 6081 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 6081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:38:51,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 3865 Invalid, 6081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6081 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-08 16:38:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-11-08 16:38:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 742. [2024-11-08 16:38:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.0944669365721997) internal successors, (811), 741 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 811 transitions. [2024-11-08 16:38:51,877 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 811 transitions. Word has length 179 [2024-11-08 16:38:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:38:51,878 INFO L471 AbstractCegarLoop]: Abstraction has 742 states and 811 transitions. [2024-11-08 16:38:51,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 4.011111111111111) internal successors, (361), 91 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:38:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 811 transitions. [2024-11-08 16:38:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-08 16:38:51,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:38:51,880 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:38:51,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-08 16:38:52,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:52,081 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:38:52,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:38:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1520521773, now seen corresponding path program 33 times [2024-11-08 16:38:52,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:38:52,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135465981] [2024-11-08 16:38:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:38:52,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:38:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:38:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:38:55,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135465981] [2024-11-08 16:38:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135465981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:38:55,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259187305] [2024-11-08 16:38:55,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:38:55,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:38:55,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:38:55,039 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:38:55,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-08 16:38:56,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-08 16:38:56,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:38:56,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-11-08 16:38:56,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:38:57,402 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 [2024-11-08 16:38:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:57,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:38:58,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:38:58,025 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 16 treesize of output 12 [2024-11-08 16:38:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 38 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:38:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259187305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:38:58,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:38:58,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 47, 47] total 75 [2024-11-08 16:38:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933106356] [2024-11-08 16:38:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:38:58,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-08 16:38:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:38:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-08 16:38:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5342, Unknown=0, NotChecked=0, Total=5550 [2024-11-08 16:38:58,288 INFO L87 Difference]: Start difference. First operand 742 states and 811 transitions. Second operand has 75 states, 75 states have (on average 3.64) internal successors, (273), 75 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:39:04,903 INFO L93 Difference]: Finished difference Result 1348 states and 1474 transitions. [2024-11-08 16:39:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-08 16:39:04,903 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.64) internal successors, (273), 75 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2024-11-08 16:39:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:39:04,905 INFO L225 Difference]: With dead ends: 1348 [2024-11-08 16:39:04,905 INFO L226 Difference]: Without dead ends: 770 [2024-11-08 16:39:04,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2949 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=464, Invalid=13108, Unknown=0, NotChecked=0, Total=13572 [2024-11-08 16:39:04,906 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 340 mSDsluCounter, 7022 mSDsCounter, 0 mSdLazyCounter, 8277 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 7147 SdHoareTripleChecker+Invalid, 8296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 8277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:39:04,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 7147 Invalid, 8296 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 8277 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-08 16:39:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2024-11-08 16:39:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 758. [2024-11-08 16:39:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.0924702774108321) internal successors, (827), 757 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 827 transitions. [2024-11-08 16:39:04,915 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 827 transitions. Word has length 184 [2024-11-08 16:39:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:39:04,915 INFO L471 AbstractCegarLoop]: Abstraction has 758 states and 827 transitions. [2024-11-08 16:39:04,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.64) internal successors, (273), 75 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 827 transitions. [2024-11-08 16:39:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-08 16:39:04,917 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:39:04,917 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:39:04,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-08 16:39:05,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-08 16:39:05,117 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:39:05,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:39:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash 601614757, now seen corresponding path program 34 times [2024-11-08 16:39:05,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:39:05,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907803556] [2024-11-08 16:39:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:39:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:39:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:39:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 561 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:08,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:39:08,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907803556] [2024-11-08 16:39:08,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907803556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:39:08,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991030511] [2024-11-08 16:39:08,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:39:08,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:39:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:39:08,250 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:39:08,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-08 16:39:08,984 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:39:08,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:39:08,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-11-08 16:39:08,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:39:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:10,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:39:12,817 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 [2024-11-08 16:39:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 630 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991030511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:39:13,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:39:13,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 94 [2024-11-08 16:39:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277746395] [2024-11-08 16:39:13,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:39:13,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-08 16:39:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:39:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-08 16:39:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=7964, Unknown=0, NotChecked=0, Total=8930 [2024-11-08 16:39:13,815 INFO L87 Difference]: Start difference. First operand 758 states and 827 transitions. Second operand has 95 states, 94 states have (on average 4.031914893617022) internal successors, (379), 95 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:39:19,169 INFO L93 Difference]: Finished difference Result 949 states and 1021 transitions. [2024-11-08 16:39:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-08 16:39:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.031914893617022) internal successors, (379), 95 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2024-11-08 16:39:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:39:19,171 INFO L225 Difference]: With dead ends: 949 [2024-11-08 16:39:19,171 INFO L226 Difference]: Without dead ends: 949 [2024-11-08 16:39:19,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 307 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7144 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1693, Invalid=16667, Unknown=0, NotChecked=0, Total=18360 [2024-11-08 16:39:19,172 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 467 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 5954 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 5954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:39:19,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 3823 Invalid, 5954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5954 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-08 16:39:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2024-11-08 16:39:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 778. [2024-11-08 16:39:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.093951093951094) internal successors, (850), 777 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 850 transitions. [2024-11-08 16:39:19,181 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 850 transitions. Word has length 188 [2024-11-08 16:39:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:39:19,181 INFO L471 AbstractCegarLoop]: Abstraction has 778 states and 850 transitions. [2024-11-08 16:39:19,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.031914893617022) internal successors, (379), 95 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:39:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 850 transitions. [2024-11-08 16:39:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-08 16:39:19,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:39:19,183 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:39:19,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-08 16:39:19,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-08 16:39:19,384 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:39:19,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:39:19,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1062683535, now seen corresponding path program 35 times [2024-11-08 16:39:19,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:39:19,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453729238] [2024-11-08 16:39:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:39:19,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:39:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:39:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 40 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:22,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:39:22,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453729238] [2024-11-08 16:39:22,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453729238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:39:22,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584196050] [2024-11-08 16:39:22,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:39:22,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:39:22,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:39:22,251 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:39:22,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-08 16:39:23,206 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-08 16:39:23,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:39:23,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-08 16:39:23,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:39:23,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-08 16:39:24,541 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-08 16:39:28,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:39:28,129 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 20 treesize of output 15 [2024-11-08 16:39:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 630 proven. 1063 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:28,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:39:33,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:39:33,512 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 16 treesize of output 12 [2024-11-08 16:39:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1693 backedges. 630 proven. 1063 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:39:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584196050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:39:39,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:39:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 49] total 147 [2024-11-08 16:39:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482288082] [2024-11-08 16:39:39,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:39:39,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2024-11-08 16:39:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:39:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2024-11-08 16:39:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=19804, Unknown=0, NotChecked=0, Total=21462 [2024-11-08 16:39:39,360 INFO L87 Difference]: Start difference. First operand 778 states and 850 transitions. Second operand has 147 states, 147 states have (on average 3.8843537414965987) internal successors, (571), 147 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:40:28,454 INFO L93 Difference]: Finished difference Result 1604 states and 1739 transitions. [2024-11-08 16:40:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-08 16:40:28,455 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.8843537414965987) internal successors, (571), 147 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2024-11-08 16:40:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:40:28,457 INFO L225 Difference]: With dead ends: 1604 [2024-11-08 16:40:28,457 INFO L226 Difference]: Without dead ends: 997 [2024-11-08 16:40:28,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15635 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=3657, Invalid=53703, Unknown=0, NotChecked=0, Total=57360 [2024-11-08 16:40:28,460 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 1245 mSDsluCounter, 5971 mSDsCounter, 0 mSdLazyCounter, 10840 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 6081 SdHoareTripleChecker+Invalid, 10843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10840 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:40:28,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1245 Valid, 6081 Invalid, 10843 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 10840 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2024-11-08 16:40:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2024-11-08 16:40:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 814. [2024-11-08 16:40:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.0934809348093482) internal successors, (889), 813 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 889 transitions. [2024-11-08 16:40:28,471 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 889 transitions. Word has length 193 [2024-11-08 16:40:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:40:28,471 INFO L471 AbstractCegarLoop]: Abstraction has 814 states and 889 transitions. [2024-11-08 16:40:28,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.8843537414965987) internal successors, (571), 147 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 889 transitions. [2024-11-08 16:40:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-08 16:40:28,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:40:28,474 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:40:28,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-08 16:40:28,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:40:28,675 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:40:28,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:40:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1620316515, now seen corresponding path program 36 times [2024-11-08 16:40:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:40:28,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509328985] [2024-11-08 16:40:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:40:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:40:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:40:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 42 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:40:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509328985] [2024-11-08 16:40:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509328985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:40:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496715832] [2024-11-08 16:40:32,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:40:32,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:40:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:40:32,341 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:40:32,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-08 16:40:35,451 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2024-11-08 16:40:35,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:40:35,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 226 conjuncts are in the unsatisfiable core [2024-11-08 16:40:35,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:40:36,853 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 [2024-11-08 16:40:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 42 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:37,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:40:37,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:40:37,467 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 16 treesize of output 12 [2024-11-08 16:40:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 42 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:37,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496715832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:40:37,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:40:37,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 51, 51] total 81 [2024-11-08 16:40:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974715094] [2024-11-08 16:40:37,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:40:37,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-08 16:40:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:40:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-08 16:40:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=6256, Unknown=0, NotChecked=0, Total=6480 [2024-11-08 16:40:37,703 INFO L87 Difference]: Start difference. First operand 814 states and 889 transitions. Second operand has 81 states, 81 states have (on average 3.691358024691358) internal successors, (299), 81 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:40:45,648 INFO L93 Difference]: Finished difference Result 1478 states and 1616 transitions. [2024-11-08 16:40:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 16:40:45,649 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.691358024691358) internal successors, (299), 81 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2024-11-08 16:40:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:40:45,652 INFO L225 Difference]: With dead ends: 1478 [2024-11-08 16:40:45,652 INFO L226 Difference]: Without dead ends: 842 [2024-11-08 16:40:45,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=504, Invalid=15498, Unknown=0, NotChecked=0, Total=16002 [2024-11-08 16:40:45,654 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 377 mSDsluCounter, 6822 mSDsCounter, 0 mSdLazyCounter, 8830 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 6959 SdHoareTripleChecker+Invalid, 8851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 8830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:40:45,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 6959 Invalid, 8851 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 8830 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-08 16:40:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2024-11-08 16:40:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 830. [2024-11-08 16:40:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.0916767189384802) internal successors, (905), 829 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 905 transitions. [2024-11-08 16:40:45,661 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 905 transitions. Word has length 202 [2024-11-08 16:40:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:40:45,662 INFO L471 AbstractCegarLoop]: Abstraction has 830 states and 905 transitions. [2024-11-08 16:40:45,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.691358024691358) internal successors, (299), 81 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:40:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 905 transitions. [2024-11-08 16:40:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-08 16:40:45,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:40:45,664 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:40:45,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-08 16:40:45,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-08 16:40:45,865 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:40:45,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:40:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash 900503573, now seen corresponding path program 37 times [2024-11-08 16:40:45,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:40:45,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946566832] [2024-11-08 16:40:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:40:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:40:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:40:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 703 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:49,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:40:49,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946566832] [2024-11-08 16:40:49,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946566832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:40:49,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585106906] [2024-11-08 16:40:49,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:40:49,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:40:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:40:49,292 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:40:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-08 16:40:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:40:49,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-11-08 16:40:49,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:40:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 780 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:51,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:40:54,393 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 [2024-11-08 16:40:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 780 proven. 1173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:40:55,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585106906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:40:55,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:40:55,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 102 [2024-11-08 16:40:55,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091088264] [2024-11-08 16:40:55,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:40:55,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-08 16:40:55,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:40:55,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-08 16:40:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1148, Invalid=9358, Unknown=0, NotChecked=0, Total=10506 [2024-11-08 16:40:55,626 INFO L87 Difference]: Start difference. First operand 830 states and 905 transitions. Second operand has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:41:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:41:02,122 INFO L93 Difference]: Finished difference Result 1039 states and 1117 transitions. [2024-11-08 16:41:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 16:41:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2024-11-08 16:41:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:41:02,125 INFO L225 Difference]: With dead ends: 1039 [2024-11-08 16:41:02,125 INFO L226 Difference]: Without dead ends: 1039 [2024-11-08 16:41:02,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 337 SyntacticMatches, 22 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8701 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1991, Invalid=19765, Unknown=0, NotChecked=0, Total=21756 [2024-11-08 16:41:02,126 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 970 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 6282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 4152 SdHoareTripleChecker+Invalid, 6282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:41:02,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 4152 Invalid, 6282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6282 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-08 16:41:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2024-11-08 16:41:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 850. [2024-11-08 16:41:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 1.0930506478209658) internal successors, (928), 849 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:41:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 928 transitions. [2024-11-08 16:41:02,137 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 928 transitions. Word has length 206 [2024-11-08 16:41:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:41:02,137 INFO L471 AbstractCegarLoop]: Abstraction has 850 states and 928 transitions. [2024-11-08 16:41:02,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 4.068627450980392) internal successors, (415), 103 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:41:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 928 transitions. [2024-11-08 16:41:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-08 16:41:02,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:41:02,138 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:41:02,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-08 16:41:02,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-08 16:41:02,339 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:41:02,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:41:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -80505855, now seen corresponding path program 38 times [2024-11-08 16:41:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:41:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423239590] [2024-11-08 16:41:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:41:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:41:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:41:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 44 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:41:06,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:41:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423239590] [2024-11-08 16:41:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423239590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:41:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224445691] [2024-11-08 16:41:06,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:41:06,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:41:06,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:41:06,160 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:41:06,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-08 16:41:06,646 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:41:06,646 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:41:06,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-11-08 16:41:06,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:41:08,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-08 16:41:14,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 16:41:14,311 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 20 treesize of output 17 [2024-11-08 16:41:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 780 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:41:14,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:41:21,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:41:21,788 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 24 treesize of output 20 [2024-11-08 16:41:21,793 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 [2024-11-08 16:41:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2060 backedges. 780 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:41:23,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224445691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:41:23,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:41:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 137 [2024-11-08 16:41:23,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552706878] [2024-11-08 16:41:23,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:41:23,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-08 16:41:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:41:23,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-08 16:41:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=17525, Unknown=0, NotChecked=0, Total=18632 [2024-11-08 16:41:23,310 INFO L87 Difference]: Start difference. First operand 850 states and 928 transitions. Second operand has 137 states, 137 states have (on average 3.9051094890510947) internal successors, (535), 137 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:41:40,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 16:41:53,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 16:42:07,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 16:42:11,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 16:42:24,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 16:42:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:42:28,595 INFO L93 Difference]: Finished difference Result 1752 states and 1899 transitions. [2024-11-08 16:42:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2024-11-08 16:42:28,596 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.9051094890510947) internal successors, (535), 137 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2024-11-08 16:42:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:42:28,599 INFO L225 Difference]: With dead ends: 1752 [2024-11-08 16:42:28,599 INFO L226 Difference]: Without dead ends: 1087 [2024-11-08 16:42:28,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 318 SyntacticMatches, 22 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17307 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=3259, Invalid=53147, Unknown=0, NotChecked=0, Total=56406 [2024-11-08 16:42:28,601 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 1686 mSDsluCounter, 7352 mSDsCounter, 0 mSdLazyCounter, 13128 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 7472 SdHoareTripleChecker+Invalid, 13158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 13128 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:42:28,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 7472 Invalid, 13158 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 13128 Invalid, 3 Unknown, 0 Unchecked, 28.7s Time] [2024-11-08 16:42:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2024-11-08 16:42:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 886. [2024-11-08 16:42:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.0926553672316384) internal successors, (967), 885 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:42:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 967 transitions. [2024-11-08 16:42:28,614 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 967 transitions. Word has length 211 [2024-11-08 16:42:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:42:28,614 INFO L471 AbstractCegarLoop]: Abstraction has 886 states and 967 transitions. [2024-11-08 16:42:28,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.9051094890510947) internal successors, (535), 137 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:42:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 967 transitions. [2024-11-08 16:42:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-08 16:42:28,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:42:28,616 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:42:28,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-08 16:42:28,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-08 16:42:28,816 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:42:28,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:42:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash 986178317, now seen corresponding path program 39 times [2024-11-08 16:42:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:42:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888701098] [2024-11-08 16:42:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:42:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:42:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:42:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 46 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:42:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:42:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888701098] [2024-11-08 16:42:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888701098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:42:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127257377] [2024-11-08 16:42:33,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:42:33,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:42:33,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:42:33,207 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:42:33,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-08 16:42:35,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-08 16:42:35,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:42:35,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 280 conjuncts are in the unsatisfiable core [2024-11-08 16:42:35,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:42:38,042 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 [2024-11-08 16:42:38,124 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 [2024-11-08 16:42:38,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 16:42:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 46 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:42:38,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:42:39,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:42:39,241 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 16 treesize of output 12 [2024-11-08 16:42:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 46 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:42:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127257377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:42:41,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:42:41,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 60, 55] total 118 [2024-11-08 16:42:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888567744] [2024-11-08 16:42:41,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:42:41,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-08 16:42:41,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:42:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-08 16:42:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=13421, Unknown=0, NotChecked=0, Total=13806 [2024-11-08 16:42:41,424 INFO L87 Difference]: Start difference. First operand 886 states and 967 transitions. Second operand has 118 states, 118 states have (on average 3.593220338983051) internal successors, (424), 118 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:42:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:42:57,690 INFO L93 Difference]: Finished difference Result 1714 states and 1866 transitions. [2024-11-08 16:42:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-11-08 16:42:57,690 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.593220338983051) internal successors, (424), 118 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2024-11-08 16:42:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:42:57,692 INFO L225 Difference]: With dead ends: 1714 [2024-11-08 16:42:57,692 INFO L226 Difference]: Without dead ends: 1013 [2024-11-08 16:42:57,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11434 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1267, Invalid=47353, Unknown=0, NotChecked=0, Total=48620 [2024-11-08 16:42:57,695 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 347 mSDsluCounter, 11229 mSDsCounter, 0 mSdLazyCounter, 14888 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 11373 SdHoareTripleChecker+Invalid, 14933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 14888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:42:57,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 11373 Invalid, 14933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 14888 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-08 16:42:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2024-11-08 16:42:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 902. [2024-11-08 16:42:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 1.0910099889012208) internal successors, (983), 901 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:42:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 983 transitions. [2024-11-08 16:42:57,734 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 983 transitions. Word has length 220 [2024-11-08 16:42:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:42:57,734 INFO L471 AbstractCegarLoop]: Abstraction has 902 states and 983 transitions. [2024-11-08 16:42:57,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.593220338983051) internal successors, (424), 118 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:42:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 983 transitions. [2024-11-08 16:42:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-08 16:42:57,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:42:57,736 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:42:57,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-08 16:42:57,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-08 16:42:57,936 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:42:57,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:42:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1553064315, now seen corresponding path program 40 times [2024-11-08 16:42:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:42:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50104032] [2024-11-08 16:42:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:42:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:42:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:43:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 861 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:43:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50104032] [2024-11-08 16:43:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50104032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:43:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697139660] [2024-11-08 16:43:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:43:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:43:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:43:02,239 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:43:02,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-08 16:43:03,471 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:43:03,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:43:03,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 223 conjuncts are in the unsatisfiable core [2024-11-08 16:43:03,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:43:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:06,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:43:09,581 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 [2024-11-08 16:43:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 946 proven. 1400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697139660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:43:11,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:43:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 110 [2024-11-08 16:43:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270874864] [2024-11-08 16:43:11,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:43:11,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-08 16:43:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:43:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-08 16:43:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=10868, Unknown=0, NotChecked=0, Total=12210 [2024-11-08 16:43:11,230 INFO L87 Difference]: Start difference. First operand 902 states and 983 transitions. Second operand has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:43:20,544 INFO L93 Difference]: Finished difference Result 1129 states and 1213 transitions. [2024-11-08 16:43:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-08 16:43:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2024-11-08 16:43:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:43:20,548 INFO L225 Difference]: With dead ends: 1129 [2024-11-08 16:43:20,548 INFO L226 Difference]: Without dead ends: 1129 [2024-11-08 16:43:20,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 367 SyntacticMatches, 24 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10108 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2309, Invalid=23131, Unknown=0, NotChecked=0, Total=25440 [2024-11-08 16:43:20,549 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 551 mSDsluCounter, 4494 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 4622 SdHoareTripleChecker+Invalid, 7768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-08 16:43:20,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 4622 Invalid, 7768 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-08 16:43:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-08 16:43:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 922. [2024-11-08 16:43:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.0922909880564604) internal successors, (1006), 921 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1006 transitions. [2024-11-08 16:43:20,560 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1006 transitions. Word has length 224 [2024-11-08 16:43:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:43:20,560 INFO L471 AbstractCegarLoop]: Abstraction has 922 states and 1006 transitions. [2024-11-08 16:43:20,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 4.1) internal successors, (451), 111 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1006 transitions. [2024-11-08 16:43:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-08 16:43:20,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:43:20,563 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:43:20,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-08 16:43:20,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:43:20,763 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:43:20,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:43:20,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1721013137, now seen corresponding path program 41 times [2024-11-08 16:43:20,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:43:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378937827] [2024-11-08 16:43:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:43:20,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:43:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:43:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:26,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:43:26,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378937827] [2024-11-08 16:43:26,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378937827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:43:26,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118252098] [2024-11-08 16:43:26,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:43:26,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:43:26,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:43:26,352 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:43:26,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-08 16:43:27,248 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2024-11-08 16:43:27,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:43:27,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 264 conjuncts are in the unsatisfiable core [2024-11-08 16:43:27,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:43:28,843 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 [2024-11-08 16:43:29,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 16:43:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:29,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:43:29,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:43:29,545 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 16 treesize of output 12 [2024-11-08 16:43:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2463 backedges. 48 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:29,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118252098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:43:29,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:43:29,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 57, 57] total 91 [2024-11-08 16:43:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56638512] [2024-11-08 16:43:29,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:43:29,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-08 16:43:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:43:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-08 16:43:29,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7939, Unknown=0, NotChecked=0, Total=8190 [2024-11-08 16:43:29,888 INFO L87 Difference]: Start difference. First operand 922 states and 1006 transitions. Second operand has 91 states, 91 states have (on average 3.7472527472527473) internal successors, (341), 91 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:43:39,129 INFO L93 Difference]: Finished difference Result 1673 states and 1829 transitions. [2024-11-08 16:43:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-08 16:43:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.7472527472527473) internal successors, (341), 91 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-11-08 16:43:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:43:39,131 INFO L225 Difference]: With dead ends: 1673 [2024-11-08 16:43:39,131 INFO L226 Difference]: Without dead ends: 950 [2024-11-08 16:43:39,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=568, Invalid=19738, Unknown=0, NotChecked=0, Total=20306 [2024-11-08 16:43:39,132 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 281 mSDsluCounter, 9094 mSDsCounter, 0 mSdLazyCounter, 11369 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 9249 SdHoareTripleChecker+Invalid, 11392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:43:39,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 9249 Invalid, 11392 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [23 Valid, 11369 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-08 16:43:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2024-11-08 16:43:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 938. [2024-11-08 16:43:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.0907150480256136) internal successors, (1022), 937 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1022 transitions. [2024-11-08 16:43:39,141 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1022 transitions. Word has length 229 [2024-11-08 16:43:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:43:39,141 INFO L471 AbstractCegarLoop]: Abstraction has 938 states and 1022 transitions. [2024-11-08 16:43:39,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.7472527472527473) internal successors, (341), 91 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:43:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1022 transitions. [2024-11-08 16:43:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2024-11-08 16:43:39,143 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:43:39,143 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:43:39,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-08 16:43:39,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-08 16:43:39,344 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:43:39,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:43:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash -936526055, now seen corresponding path program 42 times [2024-11-08 16:43:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:43:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454694435] [2024-11-08 16:43:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:43:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:43:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:43:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 946 proven. 1610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:43,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:43:43,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454694435] [2024-11-08 16:43:43,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454694435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:43:43,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087187802] [2024-11-08 16:43:43,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:43:43,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:43:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:43:43,986 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:43:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-08 16:43:53,649 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-11-08 16:43:53,649 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:43:53,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-11-08 16:43:53,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:43:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 1058 proven. 1498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:43:57,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:44:01,375 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 7 treesize of output 5 [2024-11-08 16:44:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 1058 proven. 1498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087187802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:44:02,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:44:02,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 139 [2024-11-08 16:44:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54954814] [2024-11-08 16:44:02,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:44:02,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-08 16:44:02,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:44:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-08 16:44:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2721, Invalid=16739, Unknown=0, NotChecked=0, Total=19460 [2024-11-08 16:44:02,990 INFO L87 Difference]: Start difference. First operand 938 states and 1022 transitions. Second operand has 140 states, 139 states have (on average 4.237410071942446) internal successors, (589), 140 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:44:09,772 INFO L93 Difference]: Finished difference Result 1174 states and 1261 transitions. [2024-11-08 16:44:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-08 16:44:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 139 states have (on average 4.237410071942446) internal successors, (589), 140 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2024-11-08 16:44:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:44:09,775 INFO L225 Difference]: With dead ends: 1174 [2024-11-08 16:44:09,776 INFO L226 Difference]: Without dead ends: 1174 [2024-11-08 16:44:09,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 357 SyntacticMatches, 25 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14592 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4469, Invalid=31821, Unknown=0, NotChecked=0, Total=36290 [2024-11-08 16:44:09,779 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 509 mSDsluCounter, 3716 mSDsCounter, 0 mSdLazyCounter, 5876 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 3849 SdHoareTripleChecker+Invalid, 5876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-08 16:44:09,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 3849 Invalid, 5876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5876 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-08 16:44:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2024-11-08 16:44:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 958. [2024-11-08 16:44:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.0919540229885059) internal successors, (1045), 957 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1045 transitions. [2024-11-08 16:44:09,798 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1045 transitions. Word has length 233 [2024-11-08 16:44:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:44:09,798 INFO L471 AbstractCegarLoop]: Abstraction has 958 states and 1045 transitions. [2024-11-08 16:44:09,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 139 states have (on average 4.237410071942446) internal successors, (589), 140 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1045 transitions. [2024-11-08 16:44:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2024-11-08 16:44:09,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:44:09,801 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:44:09,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-08 16:44:10,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-08 16:44:10,002 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:44:10,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:44:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1697001341, now seen corresponding path program 43 times [2024-11-08 16:44:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:44:10,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646900542] [2024-11-08 16:44:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:44:10,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:44:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:44:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:14,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:44:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646900542] [2024-11-08 16:44:14,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646900542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:44:14,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336769693] [2024-11-08 16:44:14,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:44:14,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:44:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:44:14,838 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:44:14,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-08 16:44:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:44:15,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 294 conjuncts are in the unsatisfiable core [2024-11-08 16:44:15,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:44:17,966 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 [2024-11-08 16:44:18,048 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 13 treesize of output 9 [2024-11-08 16:44:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:18,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:44:19,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:44:19,165 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 16 treesize of output 12 [2024-11-08 16:44:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 50 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336769693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:44:21,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:44:21,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 63, 59] total 124 [2024-11-08 16:44:21,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228971992] [2024-11-08 16:44:21,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:44:21,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-08 16:44:21,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:44:21,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-08 16:44:21,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=14874, Unknown=0, NotChecked=0, Total=15252 [2024-11-08 16:44:21,517 INFO L87 Difference]: Start difference. First operand 958 states and 1045 transitions. Second operand has 124 states, 124 states have (on average 3.6774193548387095) internal successors, (456), 124 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:44:38,172 INFO L93 Difference]: Finished difference Result 1852 states and 2016 transitions. [2024-11-08 16:44:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-11-08 16:44:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.6774193548387095) internal successors, (456), 124 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2024-11-08 16:44:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:44:38,175 INFO L225 Difference]: With dead ends: 1852 [2024-11-08 16:44:38,176 INFO L226 Difference]: Without dead ends: 1093 [2024-11-08 16:44:38,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12856 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1277, Invalid=53713, Unknown=0, NotChecked=0, Total=54990 [2024-11-08 16:44:38,181 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 374 mSDsluCounter, 11147 mSDsCounter, 0 mSdLazyCounter, 15146 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 11303 SdHoareTripleChecker+Invalid, 15194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 15146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:44:38,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 11303 Invalid, 15194 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [48 Valid, 15146 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-08 16:44:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2024-11-08 16:44:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 974. [2024-11-08 16:44:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 1.0904419321685508) internal successors, (1061), 973 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1061 transitions. [2024-11-08 16:44:38,192 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1061 transitions. Word has length 238 [2024-11-08 16:44:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:44:38,193 INFO L471 AbstractCegarLoop]: Abstraction has 974 states and 1061 transitions. [2024-11-08 16:44:38,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.6774193548387095) internal successors, (456), 124 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:44:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1061 transitions. [2024-11-08 16:44:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2024-11-08 16:44:38,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:44:38,196 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:44:38,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-08 16:44:38,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-08 16:44:38,397 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:44:38,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:44:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash -592347915, now seen corresponding path program 44 times [2024-11-08 16:44:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:44:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155929989] [2024-11-08 16:44:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:44:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:44:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:44:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1035 proven. 1740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:42,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:44:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155929989] [2024-11-08 16:44:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155929989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:44:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872925851] [2024-11-08 16:44:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:44:42,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:44:42,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:44:42,748 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:44:42,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-08 16:44:43,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:44:43,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:44:43,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 243 conjuncts are in the unsatisfiable core [2024-11-08 16:44:43,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:44:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1128 proven. 1647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:45,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:44:48,727 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 [2024-11-08 16:44:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 1128 proven. 1647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:44:50,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872925851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:44:50,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:44:50,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 118 [2024-11-08 16:44:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176104013] [2024-11-08 16:44:50,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:44:50,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-08 16:44:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:44:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-08 16:44:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=12486, Unknown=0, NotChecked=0, Total=14042 [2024-11-08 16:44:50,401 INFO L87 Difference]: Start difference. First operand 974 states and 1061 transitions. Second operand has 119 states, 118 states have (on average 4.127118644067797) internal successors, (487), 119 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:45:00,040 INFO L93 Difference]: Finished difference Result 1219 states and 1309 transitions. [2024-11-08 16:45:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-08 16:45:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 4.127118644067797) internal successors, (487), 119 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2024-11-08 16:45:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:45:00,043 INFO L225 Difference]: With dead ends: 1219 [2024-11-08 16:45:00,043 INFO L226 Difference]: Without dead ends: 1219 [2024-11-08 16:45:00,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 397 SyntacticMatches, 26 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11945 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2655, Invalid=26757, Unknown=0, NotChecked=0, Total=29412 [2024-11-08 16:45:00,046 INFO L432 NwaCegarLoop]: 140 mSDtfsCounter, 858 mSDsluCounter, 5397 mSDsCounter, 0 mSdLazyCounter, 9031 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 5537 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:45:00,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 5537 Invalid, 9031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9031 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-08 16:45:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2024-11-08 16:45:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 994. [2024-11-08 16:45:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.0916414904330312) internal successors, (1084), 993 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1084 transitions. [2024-11-08 16:45:00,061 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1084 transitions. Word has length 242 [2024-11-08 16:45:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:45:00,061 INFO L471 AbstractCegarLoop]: Abstraction has 994 states and 1084 transitions. [2024-11-08 16:45:00,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 4.127118644067797) internal successors, (487), 119 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1084 transitions. [2024-11-08 16:45:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-08 16:45:00,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:45:00,064 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:45:00,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-08 16:45:00,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-08 16:45:00,265 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:45:00,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:45:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1512391903, now seen corresponding path program 45 times [2024-11-08 16:45:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:45:00,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379895142] [2024-11-08 16:45:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:45:00,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:45:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:45:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 52 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:45:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379895142] [2024-11-08 16:45:05,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379895142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:45:05,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114472143] [2024-11-08 16:45:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:45:05,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:45:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:45:05,828 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:45:05,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-08 16:45:12,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-08 16:45:12,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:45:12,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 276 conjuncts are in the unsatisfiable core [2024-11-08 16:45:12,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:45:14,896 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 [2024-11-08 16:45:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 52 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:15,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:45:15,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:45:15,769 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 16 treesize of output 12 [2024-11-08 16:45:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2902 backedges. 52 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114472143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:45:16,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:45:16,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61, 61] total 96 [2024-11-08 16:45:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734683941] [2024-11-08 16:45:16,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:45:16,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-08 16:45:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:45:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-08 16:45:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=8856, Unknown=0, NotChecked=0, Total=9120 [2024-11-08 16:45:16,179 INFO L87 Difference]: Start difference. First operand 994 states and 1084 transitions. Second operand has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:45:27,952 INFO L93 Difference]: Finished difference Result 1803 states and 1971 transitions. [2024-11-08 16:45:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-08 16:45:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2024-11-08 16:45:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:45:27,955 INFO L225 Difference]: With dead ends: 1803 [2024-11-08 16:45:27,955 INFO L226 Difference]: Without dead ends: 1022 [2024-11-08 16:45:27,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5000 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=604, Invalid=22348, Unknown=0, NotChecked=0, Total=22952 [2024-11-08 16:45:27,957 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 459 mSDsluCounter, 11889 mSDsCounter, 0 mSdLazyCounter, 14205 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 12056 SdHoareTripleChecker+Invalid, 14231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 14205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-08 16:45:27,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 12056 Invalid, 14231 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 14205 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-08 16:45:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2024-11-08 16:45:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1010. [2024-11-08 16:45:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.0901883052527255) internal successors, (1100), 1009 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1100 transitions. [2024-11-08 16:45:27,971 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1100 transitions. Word has length 247 [2024-11-08 16:45:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:45:27,972 INFO L471 AbstractCegarLoop]: Abstraction has 1010 states and 1100 transitions. [2024-11-08 16:45:27,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.7916666666666665) internal successors, (364), 96 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1100 transitions. [2024-11-08 16:45:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-08 16:45:27,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:45:27,975 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:45:28,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-08 16:45:28,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:45:28,176 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:45:28,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:45:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 337843369, now seen corresponding path program 46 times [2024-11-08 16:45:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:45:28,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549701134] [2024-11-08 16:45:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:45:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:45:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:45:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1128 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:33,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:45:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549701134] [2024-11-08 16:45:33,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549701134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:45:33,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411992231] [2024-11-08 16:45:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:45:33,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:45:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:45:33,540 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:45:33,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-08 16:45:35,025 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:45:35,025 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:45:35,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 250 conjuncts are in the unsatisfiable core [2024-11-08 16:45:35,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:45:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1225 proven. 1778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:37,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:45:41,564 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 [2024-11-08 16:45:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 1225 proven. 1778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411992231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:45:43,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:45:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 122 [2024-11-08 16:45:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699524291] [2024-11-08 16:45:43,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:45:43,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2024-11-08 16:45:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:45:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2024-11-08 16:45:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1667, Invalid=13339, Unknown=0, NotChecked=0, Total=15006 [2024-11-08 16:45:43,632 INFO L87 Difference]: Start difference. First operand 1010 states and 1100 transitions. Second operand has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:45:53,926 INFO L93 Difference]: Finished difference Result 1264 states and 1357 transitions. [2024-11-08 16:45:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-08 16:45:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2024-11-08 16:45:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:45:53,929 INFO L225 Difference]: With dead ends: 1264 [2024-11-08 16:45:53,929 INFO L226 Difference]: Without dead ends: 1264 [2024-11-08 16:45:53,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 412 SyntacticMatches, 27 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12837 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2835, Invalid=28671, Unknown=0, NotChecked=0, Total=31506 [2024-11-08 16:45:53,931 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 1002 mSDsluCounter, 5824 mSDsCounter, 0 mSdLazyCounter, 9467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 9467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:45:53,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 5969 Invalid, 9467 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9467 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-08 16:45:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2024-11-08 16:45:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1030. [2024-11-08 16:45:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 1.0913508260447036) internal successors, (1123), 1029 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1123 transitions. [2024-11-08 16:45:53,944 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1123 transitions. Word has length 251 [2024-11-08 16:45:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:45:53,944 INFO L471 AbstractCegarLoop]: Abstraction has 1030 states and 1123 transitions. [2024-11-08 16:45:53,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 122 states have (on average 4.139344262295082) internal successors, (505), 123 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:45:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1123 transitions. [2024-11-08 16:45:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-08 16:45:53,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:45:53,947 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:45:53,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-08 16:45:54,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:45:54,148 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:45:54,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:45:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1274532845, now seen corresponding path program 47 times [2024-11-08 16:45:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:45:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547016382] [2024-11-08 16:45:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:45:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:45:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:45:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 54 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:45:59,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:45:59,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547016382] [2024-11-08 16:45:59,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547016382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:45:59,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430719752] [2024-11-08 16:45:59,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:45:59,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:45:59,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:45:59,617 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:45:59,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-08 16:46:03,095 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-11-08 16:46:03,095 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:46:03,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 286 conjuncts are in the unsatisfiable core [2024-11-08 16:46:03,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:46:04,978 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 [2024-11-08 16:46:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 54 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:05,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:46:05,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:46:05,766 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 16 treesize of output 12 [2024-11-08 16:46:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3135 backedges. 54 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430719752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:46:06,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:46:06,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 63, 63] total 99 [2024-11-08 16:46:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686762319] [2024-11-08 16:46:06,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:46:06,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-08 16:46:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:46:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-08 16:46:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=9430, Unknown=0, NotChecked=0, Total=9702 [2024-11-08 16:46:06,154 INFO L87 Difference]: Start difference. First operand 1030 states and 1123 transitions. Second operand has 99 states, 99 states have (on average 3.8181818181818183) internal successors, (378), 99 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:46:16,364 INFO L93 Difference]: Finished difference Result 1868 states and 2042 transitions. [2024-11-08 16:46:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-08 16:46:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.8181818181818183) internal successors, (378), 99 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2024-11-08 16:46:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:46:16,365 INFO L225 Difference]: With dead ends: 1868 [2024-11-08 16:46:16,365 INFO L226 Difference]: Without dead ends: 1058 [2024-11-08 16:46:16,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5337 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=624, Invalid=23868, Unknown=0, NotChecked=0, Total=24492 [2024-11-08 16:46:16,367 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 476 mSDsluCounter, 12342 mSDsCounter, 0 mSdLazyCounter, 14532 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 12515 SdHoareTripleChecker+Invalid, 14558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 14532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-08 16:46:16,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 12515 Invalid, 14558 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 14532 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-08 16:46:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2024-11-08 16:46:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1046. [2024-11-08 16:46:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 1.0899521531100478) internal successors, (1139), 1045 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1139 transitions. [2024-11-08 16:46:16,374 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1139 transitions. Word has length 256 [2024-11-08 16:46:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:46:16,374 INFO L471 AbstractCegarLoop]: Abstraction has 1046 states and 1139 transitions. [2024-11-08 16:46:16,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.8181818181818183) internal successors, (378), 99 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1139 transitions. [2024-11-08 16:46:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2024-11-08 16:46:16,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:46:16,377 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:46:16,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-08 16:46:16,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:46:16,578 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:46:16,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:46:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1106791579, now seen corresponding path program 48 times [2024-11-08 16:46:16,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:46:16,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434070182] [2024-11-08 16:46:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:46:16,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:46:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:46:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1225 proven. 2015 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:46:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434070182] [2024-11-08 16:46:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434070182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:46:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580609146] [2024-11-08 16:46:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:46:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:46:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:46:21,014 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:46:21,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-08 16:46:25,574 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2024-11-08 16:46:25,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:46:25,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-11-08 16:46:25,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:46:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1352 proven. 1888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:29,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:46:33,952 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 7 treesize of output 5 [2024-11-08 16:46:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 1352 proven. 1888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580609146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:46:35,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:46:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 154 [2024-11-08 16:46:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540528852] [2024-11-08 16:46:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:46:35,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2024-11-08 16:46:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:46:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2024-11-08 16:46:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3379, Invalid=20491, Unknown=0, NotChecked=0, Total=23870 [2024-11-08 16:46:35,552 INFO L87 Difference]: Start difference. First operand 1046 states and 1139 transitions. Second operand has 155 states, 154 states have (on average 4.2727272727272725) internal successors, (658), 155 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:46:43,416 INFO L93 Difference]: Finished difference Result 1309 states and 1405 transitions. [2024-11-08 16:46:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-08 16:46:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 154 states have (on average 4.2727272727272725) internal successors, (658), 155 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2024-11-08 16:46:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:46:43,418 INFO L225 Difference]: With dead ends: 1309 [2024-11-08 16:46:43,418 INFO L226 Difference]: Without dead ends: 1309 [2024-11-08 16:46:43,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 399 SyntacticMatches, 28 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18354 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=5505, Invalid=39227, Unknown=0, NotChecked=0, Total=44732 [2024-11-08 16:46:43,420 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 648 mSDsluCounter, 4701 mSDsCounter, 0 mSdLazyCounter, 7466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 4851 SdHoareTripleChecker+Invalid, 7466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:46:43,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 4851 Invalid, 7466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7466 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-08 16:46:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2024-11-08 16:46:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1066. [2024-11-08 16:46:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 1.0910798122065728) internal successors, (1162), 1065 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1162 transitions. [2024-11-08 16:46:43,429 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1162 transitions. Word has length 260 [2024-11-08 16:46:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:46:43,429 INFO L471 AbstractCegarLoop]: Abstraction has 1066 states and 1162 transitions. [2024-11-08 16:46:43,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 154 states have (on average 4.2727272727272725) internal successors, (658), 155 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:46:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1162 transitions. [2024-11-08 16:46:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2024-11-08 16:46:43,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:46:43,432 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:46:43,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-08 16:46:43,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:46:43,632 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:46:43,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:46:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 253037233, now seen corresponding path program 49 times [2024-11-08 16:46:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:46:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048281577] [2024-11-08 16:46:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:46:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:46:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:46:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 56 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:49,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:46:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048281577] [2024-11-08 16:46:49,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048281577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:46:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360634007] [2024-11-08 16:46:49,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:46:49,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:46:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:46:49,321 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:46:49,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-08 16:46:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:46:49,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 298 conjuncts are in the unsatisfiable core [2024-11-08 16:46:49,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:46:52,013 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 [2024-11-08 16:46:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 56 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:52,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:46:52,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-08 16:46:52,881 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 16 treesize of output 12 [2024-11-08 16:46:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3377 backedges. 56 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:46:53,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360634007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:46:53,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:46:53,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 65, 65] total 102 [2024-11-08 16:46:53,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455802482] [2024-11-08 16:46:53,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:46:53,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-08 16:46:53,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:46:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-08 16:46:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=10022, Unknown=0, NotChecked=0, Total=10302 [2024-11-08 16:46:53,260 INFO L87 Difference]: Start difference. First operand 1066 states and 1162 transitions. Second operand has 102 states, 102 states have (on average 3.8333333333333335) internal successors, (391), 102 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:47:03,983 INFO L93 Difference]: Finished difference Result 1933 states and 2113 transitions. [2024-11-08 16:47:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-08 16:47:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.8333333333333335) internal successors, (391), 102 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2024-11-08 16:47:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:47:03,985 INFO L225 Difference]: With dead ends: 1933 [2024-11-08 16:47:03,985 INFO L226 Difference]: Without dead ends: 1094 [2024-11-08 16:47:03,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=644, Invalid=25438, Unknown=0, NotChecked=0, Total=26082 [2024-11-08 16:47:03,987 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 496 mSDsluCounter, 11419 mSDsCounter, 0 mSdLazyCounter, 14608 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 11598 SdHoareTripleChecker+Invalid, 14635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 14608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:47:03,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 11598 Invalid, 14635 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 14608 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-11-08 16:47:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2024-11-08 16:47:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1082. [2024-11-08 16:47:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 1.0897317298797409) internal successors, (1178), 1081 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1178 transitions. [2024-11-08 16:47:03,995 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1178 transitions. Word has length 265 [2024-11-08 16:47:03,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:47:03,995 INFO L471 AbstractCegarLoop]: Abstraction has 1082 states and 1178 transitions. [2024-11-08 16:47:03,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.8333333333333335) internal successors, (391), 102 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1178 transitions. [2024-11-08 16:47:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-08 16:47:03,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:47:03,998 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:04,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-08 16:47:04,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:04,198 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:47:04,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -102952391, now seen corresponding path program 50 times [2024-11-08 16:47:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544356018] [2024-11-08 16:47:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 1326 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544356018] [2024-11-08 16:47:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544356018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76463107] [2024-11-08 16:47:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:47:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:09,058 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:09,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-08 16:47:09,527 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:47:09,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:47:09,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-11-08 16:47:09,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 1431 proven. 2055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:12,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:16,039 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 21 treesize of output 17 [2024-11-08 16:47:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 1431 proven. 2055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:19,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76463107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:19,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:19,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 159 [2024-11-08 16:47:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851150324] [2024-11-08 16:47:19,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:19,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2024-11-08 16:47:19,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2024-11-08 16:47:19,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=22111, Unknown=0, NotChecked=0, Total=25440 [2024-11-08 16:47:19,294 INFO L87 Difference]: Start difference. First operand 1082 states and 1178 transitions. Second operand has 160 states, 159 states have (on average 4.144654088050315) internal successors, (659), 160 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:47:29,614 INFO L93 Difference]: Finished difference Result 1354 states and 1453 transitions. [2024-11-08 16:47:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-08 16:47:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 159 states have (on average 4.144654088050315) internal successors, (659), 160 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2024-11-08 16:47:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:47:29,617 INFO L225 Difference]: With dead ends: 1354 [2024-11-08 16:47:29,617 INFO L226 Difference]: Without dead ends: 1354 [2024-11-08 16:47:29,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15932 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=4668, Invalid=43074, Unknown=0, NotChecked=0, Total=47742 [2024-11-08 16:47:29,619 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 1214 mSDsluCounter, 5317 mSDsCounter, 0 mSdLazyCounter, 9354 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 5472 SdHoareTripleChecker+Invalid, 9354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:47:29,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 5472 Invalid, 9354 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 9354 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-08 16:47:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2024-11-08 16:47:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1102. [2024-11-08 16:47:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.0908265213442325) internal successors, (1201), 1101 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1201 transitions. [2024-11-08 16:47:29,629 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1201 transitions. Word has length 269 [2024-11-08 16:47:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:47:29,630 INFO L471 AbstractCegarLoop]: Abstraction has 1102 states and 1201 transitions. [2024-11-08 16:47:29,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 159 states have (on average 4.144654088050315) internal successors, (659), 160 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:47:29,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1201 transitions. [2024-11-08 16:47:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-11-08 16:47:29,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:47:29,631 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:47:29,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-11-08 16:47:29,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:29,832 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-11-08 16:47:29,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:47:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1045573539, now seen corresponding path program 51 times [2024-11-08 16:47:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:47:29,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712943361] [2024-11-08 16:47:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:47:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:47:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:47:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 58 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:34,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:47:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712943361] [2024-11-08 16:47:34,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712943361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:47:34,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595002778] [2024-11-08 16:47:34,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:47:34,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:47:34,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:47:34,919 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:47:34,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaa8287-0f19-4112-8cd8-b2054c3a4adf/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-08 16:47:41,070 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-08 16:47:41,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:47:41,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 338 conjuncts are in the unsatisfiable core [2024-11-08 16:47:41,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:47:44,604 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 [2024-11-08 16:47:44,695 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 [2024-11-08 16:47:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 86 proven. 3542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:49,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:47:53,751 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 17 [2024-11-08 16:47:53,754 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 28 treesize of output 24 [2024-11-08 16:47:53,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-08 16:47:53,901 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 [2024-11-08 16:47:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3628 backedges. 86 proven. 3542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:47:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595002778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:47:58,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:47:58,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 72, 71] total 207 [2024-11-08 16:47:58,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362863619] [2024-11-08 16:47:58,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:47:58,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2024-11-08 16:47:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:47:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2024-11-08 16:47:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=41996, Unknown=0, NotChecked=0, Total=42642 [2024-11-08 16:47:58,426 INFO L87 Difference]: Start difference. First operand 1102 states and 1201 transitions. Second operand has 207 states, 207 states have (on average 3.917874396135266) internal successors, (811), 207 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)