./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1 --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 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:26:59,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:27:00,025 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:27:00,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:27:00,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:27:00,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:27:00,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:27:00,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:27:00,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:27:00,053 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:27:00,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:27:00,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:27:00,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:27:00,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:27:00,053 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:27:00,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:27:00,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:27:00,055 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:27:00,055 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:27:00,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:27:00,056 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:27:00,056 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1 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 -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2024-12-02 07:27:00,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:27:00,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:27:00,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:27:00,290 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:27:00,290 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:27:00,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2024-12-02 07:27:02,924 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/data/8d292e29e/ddc4a1ca7ae5497d80e6fa7c14a11964/FLAGe244553a4 [2024-12-02 07:27:03,170 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:27:03,170 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2024-12-02 07:27:03,180 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/data/8d292e29e/ddc4a1ca7ae5497d80e6fa7c14a11964/FLAGe244553a4 [2024-12-02 07:27:03,505 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/data/8d292e29e/ddc4a1ca7ae5497d80e6fa7c14a11964 [2024-12-02 07:27:03,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:27:03,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:27:03,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:27:03,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:27:03,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:27:03,513 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6875d5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03, skipping insertion in model container [2024-12-02 07:27:03,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,536 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:27:03,753 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 07:27:03,754 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 07:27:03,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:27:03,769 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:27:03,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:27:03,826 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:27:03,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03 WrapperNode [2024-12-02 07:27:03,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:27:03,827 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:27:03,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:27:03,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:27:03,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,858 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-12-02 07:27:03,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:27:03,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:27:03,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:27:03,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:27:03,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,868 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,882 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [3, 5]. 63 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [2, 4]. [2024-12-02 07:27:03,883 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,883 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,888 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,889 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:27:03,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:27:03,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:27:03,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:27:03,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (1/1) ... [2024-12-02 07:27:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:27:03,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:03,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:27:03,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:27:03,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:27:03,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:27:04,023 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:27:04,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:27:04,214 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-12-02 07:27:04,214 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:27:04,224 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:27:04,224 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 07:27:04,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:27:04 BoogieIcfgContainer [2024-12-02 07:27:04,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:27:04,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:27:04,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:27:04,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:27:04,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:27:03" (1/3) ... [2024-12-02 07:27:04,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e6b08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:27:04, skipping insertion in model container [2024-12-02 07:27:04,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:27:03" (2/3) ... [2024-12-02 07:27:04,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e6b08f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:27:04, skipping insertion in model container [2024-12-02 07:27:04,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:27:04" (3/3) ... [2024-12-02 07:27:04,234 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2024-12-02 07:27:04,248 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:27:04,250 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrncat-alloca-2.i that has 1 procedures, 52 locations, 1 initial locations, 4 loop locations, and 17 error locations. [2024-12-02 07:27:04,281 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:27:04,293 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;@4771c94e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:27:04,293 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-12-02 07:27:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 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) [2024-12-02 07:27:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-12-02 07:27:04,301 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:04,301 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:04,302 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:04,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031115, now seen corresponding path program 1 times [2024-12-02 07:27:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246086528] [2024-12-02 07:27:04,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:04,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:04,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246086528] [2024-12-02 07:27:04,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246086528] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:04,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:04,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:27:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916891396] [2024-12-02 07:27:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:04,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:27:04,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:04,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:27:04,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:04,476 INFO L87 Difference]: Start difference. First operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 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) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:04,527 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-12-02 07:27:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:27:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2024-12-02 07:27:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:04,535 INFO L225 Difference]: With dead ends: 53 [2024-12-02 07:27:04,535 INFO L226 Difference]: Without dead ends: 50 [2024-12-02 07:27:04,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:04,539 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:04,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-12-02 07:27:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-12-02 07:27:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-12-02 07:27:04,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2024-12-02 07:27:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:04,565 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-12-02 07:27:04,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-12-02 07:27:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 07:27:04,566 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:04,566 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:04,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:27:04,566 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:04,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -531912816, now seen corresponding path program 1 times [2024-12-02 07:27:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:04,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657761944] [2024-12-02 07:27:04,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:04,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:04,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657761944] [2024-12-02 07:27:04,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657761944] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:04,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:04,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:27:04,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610419101] [2024-12-02 07:27:04,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:04,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:04,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:04,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:04,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:04,680 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:04,772 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-12-02 07:27:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2024-12-02 07:27:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:04,773 INFO L225 Difference]: With dead ends: 53 [2024-12-02 07:27:04,773 INFO L226 Difference]: Without dead ends: 50 [2024-12-02 07:27:04,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:27:04,774 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:04,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-12-02 07:27:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-12-02 07:27:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-12-02 07:27:04,779 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2024-12-02 07:27:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:04,779 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-12-02 07:27:04,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-12-02 07:27:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 07:27:04,779 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:04,779 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:04,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:27:04,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:04,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1243094546, now seen corresponding path program 1 times [2024-12-02 07:27:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:04,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112868126] [2024-12-02 07:27:04,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:04,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:04,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112868126] [2024-12-02 07:27:04,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112868126] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:04,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:04,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:27:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163150294] [2024-12-02 07:27:04,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:04,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:27:04,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:04,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:27:04,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:04,905 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:04,941 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-12-02 07:27:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:27:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2024-12-02 07:27:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:04,942 INFO L225 Difference]: With dead ends: 48 [2024-12-02 07:27:04,942 INFO L226 Difference]: Without dead ends: 48 [2024-12-02 07:27:04,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:04,943 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:04,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-12-02 07:27:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-12-02 07:27:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 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) [2024-12-02 07:27:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-12-02 07:27:04,947 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 9 [2024-12-02 07:27:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:04,948 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-12-02 07:27:04,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-12-02 07:27:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 07:27:04,948 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:04,948 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:04,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:27:04,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:04,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1243094547, now seen corresponding path program 1 times [2024-12-02 07:27:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185396295] [2024-12-02 07:27:04,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:05,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185396295] [2024-12-02 07:27:05,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185396295] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:05,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:05,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:27:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520875947] [2024-12-02 07:27:05,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:05,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:27:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:05,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:27:05,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:27:05,212 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:05,319 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-12-02 07:27:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:27:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2024-12-02 07:27:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:05,320 INFO L225 Difference]: With dead ends: 52 [2024-12-02 07:27:05,320 INFO L226 Difference]: Without dead ends: 52 [2024-12-02 07:27:05,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:27:05,321 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:05,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-12-02 07:27:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-12-02 07:27:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-12-02 07:27:05,325 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 9 [2024-12-02 07:27:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:05,325 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-12-02 07:27:05,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-12-02 07:27:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 07:27:05,326 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:05,326 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:05,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:27:05,326 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:05,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 615049018, now seen corresponding path program 1 times [2024-12-02 07:27:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:05,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068965824] [2024-12-02 07:27:05,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068965824] [2024-12-02 07:27:05,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068965824] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:05,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:05,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:27:05,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621204666] [2024-12-02 07:27:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:05,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:27:05,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:05,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:27:05,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:27:05,371 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2024-12-02 07:27:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:05,395 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-12-02 07:27:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:27:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2024-12-02 07:27:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:05,396 INFO L225 Difference]: With dead ends: 68 [2024-12-02 07:27:05,396 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 07:27:05,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:27:05,397 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 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 [2024-12-02 07:27:05,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 07:27:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-12-02 07:27:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.574468085106383) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-12-02 07:27:05,402 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2024-12-02 07:27:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:05,403 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-12-02 07:27:05,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2024-12-02 07:27:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-12-02 07:27:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 07:27:05,403 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:05,403 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:05,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:27:05,404 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:05,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash 615051197, now seen corresponding path program 1 times [2024-12-02 07:27:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806720097] [2024-12-02 07:27:05,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:05,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806720097] [2024-12-02 07:27:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806720097] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:05,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:27:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575508675] [2024-12-02 07:27:05,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:05,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:05,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:05,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:05,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:05,461 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2024-12-02 07:27:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:05,531 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2024-12-02 07:27:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2024-12-02 07:27:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:05,532 INFO L225 Difference]: With dead ends: 64 [2024-12-02 07:27:05,532 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 07:27:05,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:27:05,533 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 50 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:05,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 142 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 07:27:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2024-12-02 07:27:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-12-02 07:27:05,538 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 11 [2024-12-02 07:27:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:05,538 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-12-02 07:27:05,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2024-12-02 07:27:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-12-02 07:27:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 07:27:05,539 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:05,539 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:05,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 07:27:05,540 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:05,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 635101388, now seen corresponding path program 1 times [2024-12-02 07:27:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726091343] [2024-12-02 07:27:05,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:05,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:05,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726091343] [2024-12-02 07:27:05,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726091343] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:05,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53252382] [2024-12-02 07:27:05,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:05,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:05,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:05,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:05,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:27:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:05,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 07:27:05,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:27:05,965 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 [2024-12-02 07:27:05,975 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 [2024-12-02 07:27:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:06,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:06,361 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:27:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53252382] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:06,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-12-02 07:27:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58372463] [2024-12-02 07:27:06,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:06,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 07:27:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:06,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 07:27:06,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:27:06,383 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:06,576 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2024-12-02 07:27:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:27:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 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 13 [2024-12-02 07:27:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:06,577 INFO L225 Difference]: With dead ends: 65 [2024-12-02 07:27:06,577 INFO L226 Difference]: Without dead ends: 65 [2024-12-02 07:27:06,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:27:06,578 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 33 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:06,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 182 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-12-02 07:27:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2024-12-02 07:27:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-12-02 07:27:06,582 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 13 [2024-12-02 07:27:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:06,582 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-12-02 07:27:06,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-12-02 07:27:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 07:27:06,583 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:06,583 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:06,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:27:06,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:06,784 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:06,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash 449177654, now seen corresponding path program 1 times [2024-12-02 07:27:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:06,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379555619] [2024-12-02 07:27:06,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:06,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:06,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379555619] [2024-12-02 07:27:06,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379555619] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:06,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175221043] [2024-12-02 07:27:06,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:06,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:06,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:06,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:27:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:06,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 07:27:06,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:07,131 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:27:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175221043] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:07,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:27:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2024-12-02 07:27:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797111593] [2024-12-02 07:27:07,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:07,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:27:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:07,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:27:07,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:27:07,132 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:07,252 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-12-02 07:27:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:27:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-12-02 07:27:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:07,253 INFO L225 Difference]: With dead ends: 56 [2024-12-02 07:27:07,254 INFO L226 Difference]: Without dead ends: 56 [2024-12-02 07:27:07,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:27:07,254 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 25 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:07,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 178 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-12-02 07:27:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-12-02 07:27:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 55 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) [2024-12-02 07:27:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-12-02 07:27:07,258 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 15 [2024-12-02 07:27:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:07,258 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-12-02 07:27:07,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-12-02 07:27:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 07:27:07,259 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:07,259 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:07,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:27:07,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:07,460 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:07,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash 707340913, now seen corresponding path program 1 times [2024-12-02 07:27:07,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:07,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522199443] [2024-12-02 07:27:07,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:07,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522199443] [2024-12-02 07:27:07,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522199443] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:07,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:07,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:27:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605403428] [2024-12-02 07:27:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:07,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:27:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:07,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:27:07,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:07,497 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:07,523 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-12-02 07:27:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:27:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-12-02 07:27:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:07,524 INFO L225 Difference]: With dead ends: 54 [2024-12-02 07:27:07,524 INFO L226 Difference]: Without dead ends: 54 [2024-12-02 07:27:07,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:27:07,525 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:07,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-12-02 07:27:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-12-02 07:27:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-12-02 07:27:07,528 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 15 [2024-12-02 07:27:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:07,528 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-12-02 07:27:07,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-12-02 07:27:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 07:27:07,528 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:07,528 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:07,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 07:27:07,529 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:07,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash 707340914, now seen corresponding path program 1 times [2024-12-02 07:27:07,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:07,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021867455] [2024-12-02 07:27:07,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:07,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:07,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021867455] [2024-12-02 07:27:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021867455] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:07,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587295274] [2024-12-02 07:27:07,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:07,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:07,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:07,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:07,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:27:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:07,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 07:27:07,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:07,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:07,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587295274] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:07,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:07,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-12-02 07:27:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357162277] [2024-12-02 07:27:07,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:07,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:27:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:07,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:27:07,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:27:07,786 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:07,936 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-12-02 07:27:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:27:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 15 [2024-12-02 07:27:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:07,937 INFO L225 Difference]: With dead ends: 73 [2024-12-02 07:27:07,937 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 07:27:07,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-12-02 07:27:07,938 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:07,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 220 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 07:27:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2024-12-02 07:27:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.446808510638298) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-12-02 07:27:07,942 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 15 [2024-12-02 07:27:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:07,942 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-12-02 07:27:07,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-12-02 07:27:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 07:27:07,943 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:07,943 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:07,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:27:08,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 07:27:08,146 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:08,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1039605391, now seen corresponding path program 1 times [2024-12-02 07:27:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:08,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832149545] [2024-12-02 07:27:08,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:08,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:08,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:08,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832149545] [2024-12-02 07:27:08,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832149545] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:08,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:08,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:27:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776042268] [2024-12-02 07:27:08,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:08,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:27:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:08,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:27:08,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:27:08,272 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:08,309 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-12-02 07:27:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:27:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2024-12-02 07:27:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:08,310 INFO L225 Difference]: With dead ends: 63 [2024-12-02 07:27:08,310 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 07:27:08,310 INFO L434 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 [2024-12-02 07:27:08,311 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:08,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 07:27:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-12-02 07:27:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-12-02 07:27:08,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 16 [2024-12-02 07:27:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:08,314 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-12-02 07:27:08,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-12-02 07:27:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 07:27:08,314 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:08,315 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:08,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 07:27:08,315 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:08,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 452799377, now seen corresponding path program 1 times [2024-12-02 07:27:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:08,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368494793] [2024-12-02 07:27:08,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:08,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368494793] [2024-12-02 07:27:08,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368494793] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:08,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:08,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:27:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366477868] [2024-12-02 07:27:08,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:08,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:08,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:08,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:08,434 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:08,452 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-12-02 07:27:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2024-12-02 07:27:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:08,453 INFO L225 Difference]: With dead ends: 62 [2024-12-02 07:27:08,453 INFO L226 Difference]: Without dead ends: 62 [2024-12-02 07:27:08,453 INFO L434 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 [2024-12-02 07:27:08,454 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:08,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 99 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-12-02 07:27:08,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-12-02 07:27:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 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) [2024-12-02 07:27:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-12-02 07:27:08,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2024-12-02 07:27:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:08,457 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-12-02 07:27:08,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-12-02 07:27:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 07:27:08,457 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:08,458 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:08,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 07:27:08,458 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:08,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash -124960132, now seen corresponding path program 1 times [2024-12-02 07:27:08,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:08,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146988872] [2024-12-02 07:27:08,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:08,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:08,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146988872] [2024-12-02 07:27:08,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146988872] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:08,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:27:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236719283] [2024-12-02 07:27:08,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:08,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:08,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:08,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:08,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:08,521 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:08,572 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-12-02 07:27:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:08,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-12-02 07:27:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:08,573 INFO L225 Difference]: With dead ends: 54 [2024-12-02 07:27:08,573 INFO L226 Difference]: Without dead ends: 54 [2024-12-02 07:27:08,574 INFO L434 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 [2024-12-02 07:27:08,574 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:08,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 77 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-12-02 07:27:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-12-02 07:27:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-12-02 07:27:08,576 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 19 [2024-12-02 07:27:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:08,577 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-12-02 07:27:08,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-12-02 07:27:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 07:27:08,577 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:08,577 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:08,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 07:27:08,578 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:08,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:08,578 INFO L85 PathProgramCache]: Analyzing trace with hash -124960131, now seen corresponding path program 1 times [2024-12-02 07:27:08,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750191657] [2024-12-02 07:27:08,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:08,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750191657] [2024-12-02 07:27:08,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750191657] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553232121] [2024-12-02 07:27:08,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:08,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:08,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:08,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:27:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:08,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 07:27:08,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:08,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:08,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:27:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:08,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553232121] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:08,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:08,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-12-02 07:27:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701867309] [2024-12-02 07:27:08,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:08,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:27:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:08,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:27:08,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:27:08,929 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:09,066 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-12-02 07:27:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:27:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 19 [2024-12-02 07:27:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:09,067 INFO L225 Difference]: With dead ends: 73 [2024-12-02 07:27:09,067 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 07:27:09,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:27:09,068 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:09,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 168 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 07:27:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2024-12-02 07:27:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-12-02 07:27:09,070 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 19 [2024-12-02 07:27:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:09,070 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-12-02 07:27:09,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-12-02 07:27:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 07:27:09,071 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:09,071 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:09,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:27:09,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 07:27:09,272 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:09,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 326348651, now seen corresponding path program 2 times [2024-12-02 07:27:09,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:09,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132429803] [2024-12-02 07:27:09,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:09,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:09,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 07:27:09,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:09,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132429803] [2024-12-02 07:27:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132429803] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:09,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:27:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373810633] [2024-12-02 07:27:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:09,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:27:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:09,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:27:09,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:27:09,376 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:09,481 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-12-02 07:27:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:27:09,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 19 [2024-12-02 07:27:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:09,482 INFO L225 Difference]: With dead ends: 58 [2024-12-02 07:27:09,482 INFO L226 Difference]: Without dead ends: 58 [2024-12-02 07:27:09,482 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:27:09,482 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:09,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-12-02 07:27:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-12-02 07:27:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3461538461538463) 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) [2024-12-02 07:27:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-12-02 07:27:09,485 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 19 [2024-12-02 07:27:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:09,485 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-12-02 07:27:09,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-12-02 07:27:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:27:09,486 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:09,486 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:09,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 07:27:09,486 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:09,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 173782235, now seen corresponding path program 1 times [2024-12-02 07:27:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717737015] [2024-12-02 07:27:09,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:09,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717737015] [2024-12-02 07:27:09,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717737015] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:09,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:09,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:27:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393559626] [2024-12-02 07:27:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:09,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:27:09,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:09,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:27:09,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:27:09,547 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.25) 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) [2024-12-02 07:27:09,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:09,567 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2024-12-02 07:27:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:27:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) 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 [2024-12-02 07:27:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:09,569 INFO L225 Difference]: With dead ends: 101 [2024-12-02 07:27:09,569 INFO L226 Difference]: Without dead ends: 101 [2024-12-02 07:27:09,569 INFO L434 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 [2024-12-02 07:27:09,569 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:09,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 122 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-12-02 07:27:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2024-12-02 07:27:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.275) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-12-02 07:27:09,572 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 21 [2024-12-02 07:27:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:09,573 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-12-02 07:27:09,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) 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) [2024-12-02 07:27:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-12-02 07:27:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:27:09,573 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:09,574 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:09,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 07:27:09,574 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:09,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:09,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1414565667, now seen corresponding path program 1 times [2024-12-02 07:27:09,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:09,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366195525] [2024-12-02 07:27:09,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:09,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:09,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366195525] [2024-12-02 07:27:09,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366195525] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:09,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:09,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:27:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023360105] [2024-12-02 07:27:09,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:09,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:09,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:09,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:09,646 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2024-12-02 07:27:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:09,665 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-12-02 07:27:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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 [2024-12-02 07:27:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:09,666 INFO L225 Difference]: With dead ends: 93 [2024-12-02 07:27:09,666 INFO L226 Difference]: Without dead ends: 93 [2024-12-02 07:27:09,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:09,667 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 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 [2024-12-02 07:27:09,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-12-02 07:27:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2024-12-02 07:27:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-12-02 07:27:09,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 21 [2024-12-02 07:27:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:09,670 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-12-02 07:27:09,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2024-12-02 07:27:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-12-02 07:27:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 07:27:09,670 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:09,670 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:09,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 07:27:09,671 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:09,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1049402990, now seen corresponding path program 1 times [2024-12-02 07:27:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:09,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662430822] [2024-12-02 07:27:09,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:10,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662430822] [2024-12-02 07:27:10,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662430822] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:10,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928106739] [2024-12-02 07:27:10,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:10,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:10,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:27:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:10,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 07:27:10,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:10,303 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 17 treesize of output 13 [2024-12-02 07:27:10,501 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-12-02 07:27:10,501 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 21 treesize of output 10 [2024-12-02 07:27:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:10,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:10,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-12-02 07:27:10,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928106739] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:10,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:10,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-12-02 07:27:10,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610035442] [2024-12-02 07:27:10,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:10,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 07:27:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:10,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 07:27:10,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-12-02 07:27:10,803 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:11,723 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2024-12-02 07:27:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:27:11,724 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2024-12-02 07:27:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:11,725 INFO L225 Difference]: With dead ends: 106 [2024-12-02 07:27:11,725 INFO L226 Difference]: Without dead ends: 106 [2024-12-02 07:27:11,726 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1707, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 07:27:11,727 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:11,727 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 404 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:27:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-12-02 07:27:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2024-12-02 07:27:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 78 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) [2024-12-02 07:27:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-12-02 07:27:11,730 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 22 [2024-12-02 07:27:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:11,730 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-12-02 07:27:11,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-12-02 07:27:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 07:27:11,731 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:11,731 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:11,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:27:11,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 07:27:11,932 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:11,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:11,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1049405113, now seen corresponding path program 1 times [2024-12-02 07:27:11,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:11,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904186776] [2024-12-02 07:27:11,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:11,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:11,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:11,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904186776] [2024-12-02 07:27:11,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904186776] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:11,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:11,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:27:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844482178] [2024-12-02 07:27:11,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:11,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:27:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:11,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:27:11,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:27:11,997 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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) [2024-12-02 07:27:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:12,046 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-12-02 07:27:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:27:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2024-12-02 07:27:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:12,047 INFO L225 Difference]: With dead ends: 78 [2024-12-02 07:27:12,047 INFO L226 Difference]: Without dead ends: 78 [2024-12-02 07:27:12,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:27:12,047 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:12,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 117 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-12-02 07:27:12,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-12-02 07:27:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.273972602739726) internal successors, (93), 77 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-12-02 07:27:12,050 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 22 [2024-12-02 07:27:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:12,050 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-12-02 07:27:12,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-12-02 07:27:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 07:27:12,051 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:12,051 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:12,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 07:27:12,051 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:12,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1049405114, now seen corresponding path program 1 times [2024-12-02 07:27:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928824911] [2024-12-02 07:27:12,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:12,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:12,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928824911] [2024-12-02 07:27:12,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928824911] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:12,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:12,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:27:12,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760484251] [2024-12-02 07:27:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:12,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:27:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:12,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:27:12,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:27:12,255 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2024-12-02 07:27:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:12,342 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2024-12-02 07:27:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:27:12,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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 [2024-12-02 07:27:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:12,343 INFO L225 Difference]: With dead ends: 86 [2024-12-02 07:27:12,343 INFO L226 Difference]: Without dead ends: 86 [2024-12-02 07:27:12,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:27:12,344 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:12,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-12-02 07:27:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2024-12-02 07:27:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-12-02 07:27:12,347 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 22 [2024-12-02 07:27:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:12,347 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-12-02 07:27:12,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2024-12-02 07:27:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-12-02 07:27:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:27:12,347 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:12,347 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:12,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 07:27:12,348 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:12,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:12,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2093148364, now seen corresponding path program 1 times [2024-12-02 07:27:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:12,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56415198] [2024-12-02 07:27:12,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:12,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:12,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56415198] [2024-12-02 07:27:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56415198] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:12,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:12,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:27:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287932618] [2024-12-02 07:27:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:12,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:27:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:12,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:27:12,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:12,437 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:12,459 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2024-12-02 07:27:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:27:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2024-12-02 07:27:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:12,460 INFO L225 Difference]: With dead ends: 143 [2024-12-02 07:27:12,460 INFO L226 Difference]: Without dead ends: 143 [2024-12-02 07:27:12,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:27:12,461 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:12,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-12-02 07:27:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2024-12-02 07:27:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.218045112781955) internal successors, (162), 137 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 162 transitions. [2024-12-02 07:27:12,465 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 162 transitions. Word has length 27 [2024-12-02 07:27:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:12,465 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 162 transitions. [2024-12-02 07:27:12,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 162 transitions. [2024-12-02 07:27:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:27:12,466 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:12,466 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:12,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-12-02 07:27:12,466 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:12,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 287710030, now seen corresponding path program 1 times [2024-12-02 07:27:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:12,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966283057] [2024-12-02 07:27:12,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:12,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966283057] [2024-12-02 07:27:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966283057] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917508022] [2024-12-02 07:27:12,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:12,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:12,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:12,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:12,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:27:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:12,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 07:27:12,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:12,716 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 [2024-12-02 07:27:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:12,784 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:27:12,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917508022] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:12,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:27:12,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-12-02 07:27:12,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060108579] [2024-12-02 07:27:12,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:12,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:27:12,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:12,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:27:12,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:27:12,785 INFO L87 Difference]: Start difference. First operand 138 states and 162 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:12,829 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2024-12-02 07:27:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:27:12,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2024-12-02 07:27:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:12,831 INFO L225 Difference]: With dead ends: 197 [2024-12-02 07:27:12,831 INFO L226 Difference]: Without dead ends: 197 [2024-12-02 07:27:12,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:27:12,832 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:12,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 228 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:12,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-12-02 07:27:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 151. [2024-12-02 07:27:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2054794520547945) internal successors, (176), 150 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2024-12-02 07:27:12,837 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 27 [2024-12-02 07:27:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:12,837 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2024-12-02 07:27:12,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2024-12-02 07:27:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:27:12,838 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:12,838 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:12,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:27:13,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 07:27:13,038 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:13,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 153696524, now seen corresponding path program 1 times [2024-12-02 07:27:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:13,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484209650] [2024-12-02 07:27:13,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484209650] [2024-12-02 07:27:13,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484209650] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682160678] [2024-12-02 07:27:13,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:13,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:13,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:27:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:13,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 07:27:13,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:13,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-12-02 07:27:13,546 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:27:13,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:27:13,549 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 18 treesize of output 10 [2024-12-02 07:27:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:13,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:13,665 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 [2024-12-02 07:27:13,668 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 [2024-12-02 07:27:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:13,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682160678] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:13,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:13,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2024-12-02 07:27:13,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250133247] [2024-12-02 07:27:13,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:13,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 07:27:13,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:13,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 07:27:13,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-12-02 07:27:13,808 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:14,317 INFO L93 Difference]: Finished difference Result 208 states and 237 transitions. [2024-12-02 07:27:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:27:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 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 27 [2024-12-02 07:27:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:14,318 INFO L225 Difference]: With dead ends: 208 [2024-12-02 07:27:14,318 INFO L226 Difference]: Without dead ends: 208 [2024-12-02 07:27:14,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 07:27:14,319 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 154 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:14,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 433 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-12-02 07:27:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2024-12-02 07:27:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.234375) internal successors, (158), 132 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2024-12-02 07:27:14,323 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 27 [2024-12-02 07:27:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:14,323 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2024-12-02 07:27:14,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2024-12-02 07:27:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:27:14,324 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:14,324 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:14,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:27:14,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:14,525 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:14,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1420832472, now seen corresponding path program 1 times [2024-12-02 07:27:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:14,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88262293] [2024-12-02 07:27:14,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:14,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:27:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88262293] [2024-12-02 07:27:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88262293] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:14,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:14,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:27:14,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056377838] [2024-12-02 07:27:14,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:14,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:27:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:14,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:27:14,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:27:14,653 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:14,673 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2024-12-02 07:27:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:27:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2024-12-02 07:27:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:14,674 INFO L225 Difference]: With dead ends: 132 [2024-12-02 07:27:14,674 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 07:27:14,675 INFO L434 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 [2024-12-02 07:27:14,675 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:14,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 64 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:27:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 07:27:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-12-02 07:27:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 108 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2024-12-02 07:27:14,678 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 29 [2024-12-02 07:27:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:14,678 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2024-12-02 07:27:14,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2024-12-02 07:27:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:27:14,678 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:14,679 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:14,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 07:27:14,679 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:14,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 179904918, now seen corresponding path program 2 times [2024-12-02 07:27:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:14,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399001564] [2024-12-02 07:27:14,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:14,697 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:14,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:15,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399001564] [2024-12-02 07:27:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399001564] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:15,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597895943] [2024-12-02 07:27:15,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:15,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:15,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:15,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:15,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:27:15,138 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:15,138 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:15,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 07:27:15,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:15,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 07:27:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:15,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:15,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:15,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:27:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597895943] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:15,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 27 [2024-12-02 07:27:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571150134] [2024-12-02 07:27:15,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:15,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 07:27:15,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:15,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 07:27:15,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-12-02 07:27:15,504 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:16,332 INFO L93 Difference]: Finished difference Result 208 states and 228 transitions. [2024-12-02 07:27:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 07:27:16,332 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 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 29 [2024-12-02 07:27:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:16,333 INFO L225 Difference]: With dead ends: 208 [2024-12-02 07:27:16,333 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 07:27:16,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 07:27:16,334 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 149 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:16,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 464 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:27:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 07:27:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2024-12-02 07:27:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1538461538461537) internal successors, (150), 133 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2024-12-02 07:27:16,338 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 29 [2024-12-02 07:27:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:16,338 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2024-12-02 07:27:16,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2024-12-02 07:27:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 07:27:16,339 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:16,339 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:16,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:27:16,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 07:27:16,540 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:16,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1099038843, now seen corresponding path program 2 times [2024-12-02 07:27:16,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:16,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68393930] [2024-12-02 07:27:16,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:16,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:16,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:16,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68393930] [2024-12-02 07:27:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68393930] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:27:16,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:27:16,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:27:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31775712] [2024-12-02 07:27:16,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:27:16,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:27:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:16,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:27:16,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:27:16,719 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:16,782 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2024-12-02 07:27:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:27:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2024-12-02 07:27:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:16,783 INFO L225 Difference]: With dead ends: 189 [2024-12-02 07:27:16,783 INFO L226 Difference]: Without dead ends: 173 [2024-12-02 07:27:16,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:27:16,784 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:16,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 210 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:27:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-12-02 07:27:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2024-12-02 07:27:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 132 states have (on average 1.1666666666666667) internal successors, (154), 135 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2024-12-02 07:27:16,787 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 31 [2024-12-02 07:27:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:16,788 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2024-12-02 07:27:16,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2024-12-02 07:27:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-12-02 07:27:16,788 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:16,788 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:16,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 07:27:16,788 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:16,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1081226381, now seen corresponding path program 1 times [2024-12-02 07:27:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:16,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353913715] [2024-12-02 07:27:16,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:17,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:17,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353913715] [2024-12-02 07:27:17,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353913715] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:17,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714498644] [2024-12-02 07:27:17,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:17,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:17,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:17,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:17,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:27:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:17,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 07:27:17,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:17,974 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 17 treesize of output 13 [2024-12-02 07:27:18,358 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2024-12-02 07:27:18,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 20 [2024-12-02 07:27:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:18,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:18,587 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 35 treesize of output 31 [2024-12-02 07:27:18,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:27:18,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2024-12-02 07:27:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:18,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714498644] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:18,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:18,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2024-12-02 07:27:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521331245] [2024-12-02 07:27:18,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:18,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 07:27:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:18,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 07:27:18,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:27:18,830 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:20,149 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2024-12-02 07:27:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 07:27:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 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 32 [2024-12-02 07:27:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:20,150 INFO L225 Difference]: With dead ends: 205 [2024-12-02 07:27:20,150 INFO L226 Difference]: Without dead ends: 183 [2024-12-02 07:27:20,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=438, Invalid=3468, Unknown=0, NotChecked=0, Total=3906 [2024-12-02 07:27:20,151 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 298 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:20,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 302 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:27:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-12-02 07:27:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 155. [2024-12-02 07:27:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 154 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:20,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2024-12-02 07:27:20,153 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 32 [2024-12-02 07:27:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:20,154 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2024-12-02 07:27:20,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2024-12-02 07:27:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 07:27:20,154 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:20,154 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:20,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:27:20,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:20,355 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:20,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash 309603390, now seen corresponding path program 1 times [2024-12-02 07:27:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:20,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935535137] [2024-12-02 07:27:20,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:20,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935535137] [2024-12-02 07:27:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935535137] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206213575] [2024-12-02 07:27:20,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:20,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:20,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:20,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:27:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:20,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 07:27:20,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:20,782 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:20,923 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 [2024-12-02 07:27:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206213575] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:20,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-12-02 07:27:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372636924] [2024-12-02 07:27:20,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:20,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 07:27:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:20,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 07:27:20,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-12-02 07:27:20,943 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:21,140 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2024-12-02 07:27:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:27:21,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 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 35 [2024-12-02 07:27:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:21,141 INFO L225 Difference]: With dead ends: 177 [2024-12-02 07:27:21,141 INFO L226 Difference]: Without dead ends: 177 [2024-12-02 07:27:21,141 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-12-02 07:27:21,141 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:21,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 372 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-12-02 07:27:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2024-12-02 07:27:21,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.15527950310559) internal successors, (186), 164 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:21,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-12-02 07:27:21,145 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 35 [2024-12-02 07:27:21,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:21,145 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-12-02 07:27:21,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:21,146 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-12-02 07:27:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 07:27:21,146 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:21,146 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:21,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-12-02 07:27:21,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:21,347 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:21,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 860813788, now seen corresponding path program 3 times [2024-12-02 07:27:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:21,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560461941] [2024-12-02 07:27:21,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:21,365 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 07:27:21,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:21,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560461941] [2024-12-02 07:27:21,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560461941] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:21,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673262265] [2024-12-02 07:27:21,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:21,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:21,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:21,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:27:21,904 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 07:27:21,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:21,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:27:21,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:22,083 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 [2024-12-02 07:27:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:22,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:22,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:22,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:27:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:22,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673262265] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:22,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:22,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2024-12-02 07:27:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730985778] [2024-12-02 07:27:22,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:22,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 07:27:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:22,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 07:27:22,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 07:27:22,472 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 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) [2024-12-02 07:27:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:24,243 INFO L93 Difference]: Finished difference Result 311 states and 341 transitions. [2024-12-02 07:27:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-12-02 07:27:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 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) Word has length 36 [2024-12-02 07:27:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:24,245 INFO L225 Difference]: With dead ends: 311 [2024-12-02 07:27:24,245 INFO L226 Difference]: Without dead ends: 266 [2024-12-02 07:27:24,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=449, Invalid=4663, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 07:27:24,248 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 260 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:24,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1149 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 07:27:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-12-02 07:27:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 195. [2024-12-02 07:27:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 194 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) [2024-12-02 07:27:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 218 transitions. [2024-12-02 07:27:24,252 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 218 transitions. Word has length 36 [2024-12-02 07:27:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:24,252 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 218 transitions. [2024-12-02 07:27:24,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 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) [2024-12-02 07:27:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 218 transitions. [2024-12-02 07:27:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-12-02 07:27:24,253 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:24,253 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:24,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:27:24,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:24,453 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:24,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1590151631, now seen corresponding path program 2 times [2024-12-02 07:27:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:24,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047341399] [2024-12-02 07:27:24,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:24,475 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:24,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:25,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047341399] [2024-12-02 07:27:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047341399] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547313413] [2024-12-02 07:27:25,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:25,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:25,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:27:25,319 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:25,319 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:25,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-02 07:27:25,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:25,531 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 17 treesize of output 13 [2024-12-02 07:27:26,085 INFO L349 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2024-12-02 07:27:26,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 30 [2024-12-02 07:27:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:26,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:26,294 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 53 treesize of output 47 [2024-12-02 07:27:26,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:27:26,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 46 [2024-12-02 07:27:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:26,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547313413] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:26,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:26,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2024-12-02 07:27:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682432568] [2024-12-02 07:27:26,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:26,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-12-02 07:27:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:26,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-12-02 07:27:26,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 07:27:26,642 INFO L87 Difference]: Start difference. First operand 195 states and 218 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:28,400 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2024-12-02 07:27:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:27:28,401 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 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 39 [2024-12-02 07:27:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:28,401 INFO L225 Difference]: With dead ends: 270 [2024-12-02 07:27:28,401 INFO L226 Difference]: Without dead ends: 255 [2024-12-02 07:27:28,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=426, Invalid=3604, Unknown=2, NotChecked=0, Total=4032 [2024-12-02 07:27:28,403 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:28,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 470 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:27:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-12-02 07:27:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2024-12-02 07:27:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.1442307692307692) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2024-12-02 07:27:28,408 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 39 [2024-12-02 07:27:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:28,408 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2024-12-02 07:27:28,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2024-12-02 07:27:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 07:27:28,408 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:28,409 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:28,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 07:27:28,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:28,609 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:28,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:28,609 INFO L85 PathProgramCache]: Analyzing trace with hash -687458872, now seen corresponding path program 2 times [2024-12-02 07:27:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:28,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558418942] [2024-12-02 07:27:28,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:28,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:28,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558418942] [2024-12-02 07:27:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558418942] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820105672] [2024-12-02 07:27:28,963 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:27:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:28,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:28,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:27:29,050 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:27:29,050 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:29,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 07:27:29,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:29,105 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 [2024-12-02 07:27:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:29,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:29,215 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 [2024-12-02 07:27:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 07:27:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:27:29,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820105672] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:29,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:29,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 26 [2024-12-02 07:27:29,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088392913] [2024-12-02 07:27:29,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:29,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 07:27:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:29,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 07:27:29,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-12-02 07:27:29,270 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:29,754 INFO L93 Difference]: Finished difference Result 368 states and 401 transitions. [2024-12-02 07:27:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 07:27:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 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 [2024-12-02 07:27:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:29,755 INFO L225 Difference]: With dead ends: 368 [2024-12-02 07:27:29,755 INFO L226 Difference]: Without dead ends: 275 [2024-12-02 07:27:29,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 07:27:29,756 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:29,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 297 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-12-02 07:27:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 235. [2024-12-02 07:27:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.1385281385281385) internal successors, (263), 234 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) [2024-12-02 07:27:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 263 transitions. [2024-12-02 07:27:29,760 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 263 transitions. Word has length 40 [2024-12-02 07:27:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:29,760 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 263 transitions. [2024-12-02 07:27:29,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 263 transitions. [2024-12-02 07:27:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 07:27:29,761 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:29,761 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:29,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:27:29,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:29,961 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:29,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1279086680, now seen corresponding path program 4 times [2024-12-02 07:27:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:29,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093057868] [2024-12-02 07:27:29,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:29,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:29,976 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:29,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093057868] [2024-12-02 07:27:30,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093057868] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577276173] [2024-12-02 07:27:30,501 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:30,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:30,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:30,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:30,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:27:30,602 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:30,602 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:30,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-12-02 07:27:30,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:30,842 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 [2024-12-02 07:27:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:31,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:31,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:31,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:27:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:31,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577276173] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:31,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2024-12-02 07:27:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652151304] [2024-12-02 07:27:31,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:31,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-12-02 07:27:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:31,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-12-02 07:27:31,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 07:27:31,417 INFO L87 Difference]: Start difference. First operand 235 states and 263 transitions. Second operand has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:33,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:33,146 INFO L93 Difference]: Finished difference Result 503 states and 554 transitions. [2024-12-02 07:27:33,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-12-02 07:27:33,146 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 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 43 [2024-12-02 07:27:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:33,147 INFO L225 Difference]: With dead ends: 503 [2024-12-02 07:27:33,147 INFO L226 Difference]: Without dead ends: 449 [2024-12-02 07:27:33,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=5495, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 07:27:33,149 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 233 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:33,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1364 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:27:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-12-02 07:27:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 313. [2024-12-02 07:27:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 309 states have (on average 1.1262135922330097) internal successors, (348), 312 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 348 transitions. [2024-12-02 07:27:33,156 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 348 transitions. Word has length 43 [2024-12-02 07:27:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:33,156 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 348 transitions. [2024-12-02 07:27:33,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 348 transitions. [2024-12-02 07:27:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 07:27:33,157 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:33,157 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:33,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:27:33,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:33,358 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:33,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash -73267295, now seen corresponding path program 3 times [2024-12-02 07:27:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:33,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341579377] [2024-12-02 07:27:33,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:33,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:33,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:27:33,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:34,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341579377] [2024-12-02 07:27:34,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341579377] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238632592] [2024-12-02 07:27:34,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:34,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:34,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:34,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:27:34,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:27:34,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:34,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 07:27:34,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:34,517 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 16 treesize of output 12 [2024-12-02 07:27:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:34,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:35,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2024-12-02 07:27:35,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2024-12-02 07:27:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:27:35,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238632592] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:35,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2024-12-02 07:27:35,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128843559] [2024-12-02 07:27:35,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:35,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-12-02 07:27:35,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:35,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-12-02 07:27:35,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2024-12-02 07:27:35,689 INFO L87 Difference]: Start difference. First operand 313 states and 348 transitions. Second operand has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:36,561 INFO L93 Difference]: Finished difference Result 364 states and 399 transitions. [2024-12-02 07:27:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 07:27:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2024-12-02 07:27:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:36,562 INFO L225 Difference]: With dead ends: 364 [2024-12-02 07:27:36,562 INFO L226 Difference]: Without dead ends: 330 [2024-12-02 07:27:36,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=420, Invalid=3870, Unknown=0, NotChecked=0, Total=4290 [2024-12-02 07:27:36,563 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 81 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:36,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 624 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:27:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-12-02 07:27:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 277. [2024-12-02 07:27:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 273 states have (on average 1.1318681318681318) internal successors, (309), 276 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 309 transitions. [2024-12-02 07:27:36,566 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 309 transitions. Word has length 46 [2024-12-02 07:27:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:36,566 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 309 transitions. [2024-12-02 07:27:36,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.14) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 309 transitions. [2024-12-02 07:27:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-12-02 07:27:36,567 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:36,567 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:36,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:27:36,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:36,768 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:36,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1292401631, now seen corresponding path program 5 times [2024-12-02 07:27:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833573413] [2024-12-02 07:27:36,768 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:27:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:36,782 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 07:27:36,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:36,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833573413] [2024-12-02 07:27:36,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833573413] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:36,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986519949] [2024-12-02 07:27:36,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:27:36,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:36,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:27:37,090 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-12-02 07:27:37,090 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:37,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-12-02 07:27:37,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:37,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:37,419 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 18 [2024-12-02 07:27:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986519949] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:37,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:37,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2024-12-02 07:27:37,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494437017] [2024-12-02 07:27:37,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:37,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 07:27:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:37,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 07:27:37,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 07:27:37,563 INFO L87 Difference]: Start difference. First operand 277 states and 309 transitions. Second operand has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:37,929 INFO L93 Difference]: Finished difference Result 386 states and 425 transitions. [2024-12-02 07:27:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 07:27:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 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 47 [2024-12-02 07:27:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:37,930 INFO L225 Difference]: With dead ends: 386 [2024-12-02 07:27:37,930 INFO L226 Difference]: Without dead ends: 372 [2024-12-02 07:27:37,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 07:27:37,931 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 223 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:37,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 520 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:27:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-12-02 07:27:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 289. [2024-12-02 07:27:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 285 states have (on average 1.1298245614035087) internal successors, (322), 288 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 322 transitions. [2024-12-02 07:27:37,937 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 322 transitions. Word has length 47 [2024-12-02 07:27:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:37,937 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 322 transitions. [2024-12-02 07:27:37,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.606060606060606) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 322 transitions. [2024-12-02 07:27:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 07:27:37,937 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:37,938 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:37,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 07:27:38,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:38,138 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:38,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1688722474, now seen corresponding path program 3 times [2024-12-02 07:27:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:38,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464651306] [2024-12-02 07:27:38,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:38,157 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 07:27:38,157 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:27:38,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464651306] [2024-12-02 07:27:38,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464651306] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:38,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889060198] [2024-12-02 07:27:38,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:27:38,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:38,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:27:38,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 07:27:38,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:38,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 07:27:38,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:38,624 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 [2024-12-02 07:27:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:27:38,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:27:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889060198] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:39,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:39,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2024-12-02 07:27:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475025767] [2024-12-02 07:27:39,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:39,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 07:27:39,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:39,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 07:27:39,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 07:27:39,096 INFO L87 Difference]: Start difference. First operand 289 states and 322 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:39,356 INFO L93 Difference]: Finished difference Result 341 states and 374 transitions. [2024-12-02 07:27:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:27:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 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 48 [2024-12-02 07:27:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:39,358 INFO L225 Difference]: With dead ends: 341 [2024-12-02 07:27:39,358 INFO L226 Difference]: Without dead ends: 341 [2024-12-02 07:27:39,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:27:39,359 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:39,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 485 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-12-02 07:27:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 305. [2024-12-02 07:27:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.1262458471760797) internal successors, (339), 304 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 339 transitions. [2024-12-02 07:27:39,362 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 339 transitions. Word has length 48 [2024-12-02 07:27:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:39,362 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 339 transitions. [2024-12-02 07:27:39,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 339 transitions. [2024-12-02 07:27:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-12-02 07:27:39,362 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:39,362 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:39,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 07:27:39,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:39,563 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:39,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1850127798, now seen corresponding path program 6 times [2024-12-02 07:27:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593629200] [2024-12-02 07:27:39,563 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:27:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:39,582 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 07:27:39,582 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593629200] [2024-12-02 07:27:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593629200] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345459204] [2024-12-02 07:27:40,017 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:27:40,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:40,022 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:40,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 07:27:40,131 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 07:27:40,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:40,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-12-02 07:27:40,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:40,359 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 [2024-12-02 07:27:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:40,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:40,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:40,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:27:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:40,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345459204] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:40,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 49 [2024-12-02 07:27:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333354506] [2024-12-02 07:27:40,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:40,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 07:27:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:40,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 07:27:40,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:27:40,930 INFO L87 Difference]: Start difference. First operand 305 states and 339 transitions. Second operand has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:42,229 INFO L93 Difference]: Finished difference Result 434 states and 473 transitions. [2024-12-02 07:27:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 07:27:42,230 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 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 50 [2024-12-02 07:27:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:42,230 INFO L225 Difference]: With dead ends: 434 [2024-12-02 07:27:42,231 INFO L226 Difference]: Without dead ends: 379 [2024-12-02 07:27:42,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=381, Invalid=5319, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 07:27:42,232 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 156 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:42,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1241 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:27:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-12-02 07:27:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 348. [2024-12-02 07:27:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.1133720930232558) internal successors, (383), 347 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 383 transitions. [2024-12-02 07:27:42,235 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 383 transitions. Word has length 50 [2024-12-02 07:27:42,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:42,235 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 383 transitions. [2024-12-02 07:27:42,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.795918367346939) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 383 transitions. [2024-12-02 07:27:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-12-02 07:27:42,236 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:42,236 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:42,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 07:27:42,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:42,437 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:42,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:42,437 INFO L85 PathProgramCache]: Analyzing trace with hash 78144904, now seen corresponding path program 4 times [2024-12-02 07:27:42,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:42,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079508167] [2024-12-02 07:27:42,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:42,451 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:42,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:43,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079508167] [2024-12-02 07:27:43,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079508167] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:43,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213664908] [2024-12-02 07:27:43,066 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:43,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:43,072 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:43,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 07:27:43,183 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:43,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:43,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-12-02 07:27:43,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:43,449 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 17 treesize of output 13 [2024-12-02 07:27:45,137 INFO L349 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2024-12-02 07:27:45,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 50 [2024-12-02 07:27:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:45,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:45,971 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 89 treesize of output 79 [2024-12-02 07:27:45,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2024-12-02 07:27:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213664908] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:46,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 66 [2024-12-02 07:27:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147304787] [2024-12-02 07:27:46,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:46,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-12-02 07:27:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:46,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-12-02 07:27:46,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3976, Unknown=1, NotChecked=0, Total=4290 [2024-12-02 07:27:46,613 INFO L87 Difference]: Start difference. First operand 348 states and 383 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:53,260 INFO L93 Difference]: Finished difference Result 564 states and 612 transitions. [2024-12-02 07:27:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-12-02 07:27:53,260 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 50 [2024-12-02 07:27:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:53,261 INFO L225 Difference]: With dead ends: 564 [2024-12-02 07:27:53,261 INFO L226 Difference]: Without dead ends: 515 [2024-12-02 07:27:53,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=935, Invalid=12868, Unknown=3, NotChecked=0, Total=13806 [2024-12-02 07:27:53,262 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 307 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 2551 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:53,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1353 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2551 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-12-02 07:27:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-12-02 07:27:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 391. [2024-12-02 07:27:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 387 states have (on average 1.1111111111111112) internal successors, (430), 390 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 430 transitions. [2024-12-02 07:27:53,266 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 430 transitions. Word has length 50 [2024-12-02 07:27:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:53,266 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 430 transitions. [2024-12-02 07:27:53,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 430 transitions. [2024-12-02 07:27:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-12-02 07:27:53,267 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:53,267 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:53,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 07:27:53,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-12-02 07:27:53,467 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:53,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1568316700, now seen corresponding path program 1 times [2024-12-02 07:27:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:53,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768271197] [2024-12-02 07:27:53,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:27:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768271197] [2024-12-02 07:27:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768271197] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744748972] [2024-12-02 07:27:53,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:27:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:53,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:53,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 07:27:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:53,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 07:27:53,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:27:53,962 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 07:27:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744748972] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:54,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:54,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-12-02 07:27:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056497989] [2024-12-02 07:27:54,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:54,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 07:27:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:54,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 07:27:54,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2024-12-02 07:27:54,303 INFO L87 Difference]: Start difference. First operand 391 states and 430 transitions. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:54,731 INFO L93 Difference]: Finished difference Result 475 states and 516 transitions. [2024-12-02 07:27:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 07:27:54,731 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 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 53 [2024-12-02 07:27:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:54,732 INFO L225 Difference]: With dead ends: 475 [2024-12-02 07:27:54,732 INFO L226 Difference]: Without dead ends: 475 [2024-12-02 07:27:54,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=1854, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:27:54,733 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 161 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:54,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 320 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-12-02 07:27:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 450. [2024-12-02 07:27:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 446 states have (on average 1.109865470852018) internal successors, (495), 449 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 495 transitions. [2024-12-02 07:27:54,737 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 495 transitions. Word has length 53 [2024-12-02 07:27:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:54,737 INFO L471 AbstractCegarLoop]: Abstraction has 450 states and 495 transitions. [2024-12-02 07:27:54,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 495 transitions. [2024-12-02 07:27:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-12-02 07:27:54,737 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:54,737 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:54,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 07:27:54,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 07:27:54,938 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:54,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -463127248, now seen corresponding path program 4 times [2024-12-02 07:27:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514250534] [2024-12-02 07:27:54,938 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:54,954 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:54,954 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:27:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514250534] [2024-12-02 07:27:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514250534] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654944089] [2024-12-02 07:27:55,105 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:27:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:55,107 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 07:27:55,297 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:27:55,297 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:55,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:27:55,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:55,430 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 [2024-12-02 07:27:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:55,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:55,563 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 [2024-12-02 07:27:55,565 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 [2024-12-02 07:27:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654944089] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:55,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:55,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 34 [2024-12-02 07:27:55,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756331503] [2024-12-02 07:27:55,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:55,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 07:27:55,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:55,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 07:27:55,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 07:27:55,744 INFO L87 Difference]: Start difference. First operand 450 states and 495 transitions. Second operand has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:56,503 INFO L93 Difference]: Finished difference Result 437 states and 475 transitions. [2024-12-02 07:27:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 07:27:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 0 states have call successors, (0), 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 53 [2024-12-02 07:27:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:56,505 INFO L225 Difference]: With dead ends: 437 [2024-12-02 07:27:56,505 INFO L226 Difference]: Without dead ends: 399 [2024-12-02 07:27:56,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 07:27:56,506 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:56,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 467 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:27:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-12-02 07:27:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 376. [2024-12-02 07:27:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 372 states have (on average 1.1102150537634408) internal successors, (413), 375 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 413 transitions. [2024-12-02 07:27:56,511 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 413 transitions. Word has length 53 [2024-12-02 07:27:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:56,511 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 413 transitions. [2024-12-02 07:27:56,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 34 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 413 transitions. [2024-12-02 07:27:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-12-02 07:27:56,512 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:56,512 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:56,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 07:27:56,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 07:27:56,712 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:56,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1173321711, now seen corresponding path program 5 times [2024-12-02 07:27:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:56,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821272864] [2024-12-02 07:27:56,713 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:27:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:56,727 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 07:27:56,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 55 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821272864] [2024-12-02 07:27:56,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821272864] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446859799] [2024-12-02 07:27:56,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:27:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:56,994 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 07:27:57,132 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 07:27:57,132 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:27:57,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 07:27:57,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 55 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:57,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:57,558 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 18 [2024-12-02 07:27:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 55 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446859799] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:27:57,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:27:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-12-02 07:27:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116935099] [2024-12-02 07:27:57,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:27:57,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 07:27:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:27:57,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 07:27:57,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 07:27:57,731 INFO L87 Difference]: Start difference. First operand 376 states and 413 transitions. Second operand has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 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) [2024-12-02 07:27:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:27:58,391 INFO L93 Difference]: Finished difference Result 525 states and 570 transitions. [2024-12-02 07:27:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 07:27:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 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 54 [2024-12-02 07:27:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:27:58,393 INFO L225 Difference]: With dead ends: 525 [2024-12-02 07:27:58,393 INFO L226 Difference]: Without dead ends: 516 [2024-12-02 07:27:58,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 07:27:58,393 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 135 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:27:58,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1057 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:27:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-12-02 07:27:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 349. [2024-12-02 07:27:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 345 states have (on average 1.1188405797101448) internal successors, (386), 348 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:27:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 386 transitions. [2024-12-02 07:27:58,397 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 386 transitions. Word has length 54 [2024-12-02 07:27:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:27:58,397 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 386 transitions. [2024-12-02 07:27:58,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 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) [2024-12-02 07:27:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 386 transitions. [2024-12-02 07:27:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-12-02 07:27:58,398 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:27:58,398 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:27:58,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 07:27:58,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 07:27:58,598 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:27:58,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:27:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1539356858, now seen corresponding path program 7 times [2024-12-02 07:27:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:27:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832248572] [2024-12-02 07:27:58,599 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:27:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:27:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:27:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832248572] [2024-12-02 07:27:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832248572] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:27:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041981301] [2024-12-02 07:27:59,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:27:59,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:27:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:27:59,230 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:27:59,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 07:27:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:27:59,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 07:27:59,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:27:59,628 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 [2024-12-02 07:27:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 11 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:27:59,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:27:59,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:27:59,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:28:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 11 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041981301] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:00,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:00,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 49 [2024-12-02 07:28:00,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790156284] [2024-12-02 07:28:00,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:00,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 07:28:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:00,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 07:28:00,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 07:28:00,221 INFO L87 Difference]: Start difference. First operand 349 states and 386 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:02,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:02,949 INFO L93 Difference]: Finished difference Result 608 states and 658 transitions. [2024-12-02 07:28:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-12-02 07:28:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 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 57 [2024-12-02 07:28:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:02,950 INFO L225 Difference]: With dead ends: 608 [2024-12-02 07:28:02,950 INFO L226 Difference]: Without dead ends: 539 [2024-12-02 07:28:02,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=602, Invalid=8328, Unknown=0, NotChecked=0, Total=8930 [2024-12-02 07:28:02,951 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 249 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:02,951 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1868 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 07:28:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2024-12-02 07:28:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 387. [2024-12-02 07:28:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 383 states have (on average 1.112271540469974) internal successors, (426), 386 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 426 transitions. [2024-12-02 07:28:02,957 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 426 transitions. Word has length 57 [2024-12-02 07:28:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:02,957 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 426 transitions. [2024-12-02 07:28:02,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 426 transitions. [2024-12-02 07:28:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-12-02 07:28:02,958 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:02,958 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2024-12-02 07:28:02,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 07:28:03,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:03,159 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:03,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:03,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1560318359, now seen corresponding path program 5 times [2024-12-02 07:28:03,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:03,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603914206] [2024-12-02 07:28:03,159 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:28:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:03,181 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 07:28:03,181 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:03,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603914206] [2024-12-02 07:28:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603914206] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864603804] [2024-12-02 07:28:03,432 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:28:03,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:03,434 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 07:28:03,601 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 07:28:03,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:03,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-12-02 07:28:03,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:03,675 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 [2024-12-02 07:28:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:28:03,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:03,822 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 [2024-12-02 07:28:03,824 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 [2024-12-02 07:28:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:28:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864603804] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:03,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:03,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 30 [2024-12-02 07:28:03,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253924374] [2024-12-02 07:28:03,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:03,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 07:28:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:03,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 07:28:03,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2024-12-02 07:28:03,892 INFO L87 Difference]: Start difference. First operand 387 states and 426 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:04,815 INFO L93 Difference]: Finished difference Result 761 states and 813 transitions. [2024-12-02 07:28:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-12-02 07:28:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 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 57 [2024-12-02 07:28:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:04,816 INFO L225 Difference]: With dead ends: 761 [2024-12-02 07:28:04,816 INFO L226 Difference]: Without dead ends: 631 [2024-12-02 07:28:04,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=4172, Unknown=0, NotChecked=0, Total=4556 [2024-12-02 07:28:04,817 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:04,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 791 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:28:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2024-12-02 07:28:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 470. [2024-12-02 07:28:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 466 states have (on average 1.1072961373390557) internal successors, (516), 469 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 516 transitions. [2024-12-02 07:28:04,824 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 516 transitions. Word has length 57 [2024-12-02 07:28:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:04,824 INFO L471 AbstractCegarLoop]: Abstraction has 470 states and 516 transitions. [2024-12-02 07:28:04,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 516 transitions. [2024-12-02 07:28:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-12-02 07:28:04,825 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:04,825 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:04,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 07:28:05,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:05,026 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:05,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1655032015, now seen corresponding path program 6 times [2024-12-02 07:28:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795373156] [2024-12-02 07:28:05,026 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:28:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:05,066 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 07:28:05,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:06,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795373156] [2024-12-02 07:28:06,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795373156] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:06,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138431977] [2024-12-02 07:28:06,352 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:28:06,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:06,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:06,353 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:06,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 07:28:06,534 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 07:28:06,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:06,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-12-02 07:28:06,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:06,995 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 16 treesize of output 12 [2024-12-02 07:28:08,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:08,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 48 treesize of output 24 [2024-12-02 07:28:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:08,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:08,461 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 107 treesize of output 95 [2024-12-02 07:28:08,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:08,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 113 treesize of output 91 [2024-12-02 07:28:09,309 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:28:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138431977] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:09,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 73 [2024-12-02 07:28:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516100893] [2024-12-02 07:28:09,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:09,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-12-02 07:28:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:09,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-12-02 07:28:09,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=4774, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 07:28:09,380 INFO L87 Difference]: Start difference. First operand 470 states and 516 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:11,188 INFO L93 Difference]: Finished difference Result 651 states and 706 transitions. [2024-12-02 07:28:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-12-02 07:28:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 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 60 [2024-12-02 07:28:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:11,189 INFO L225 Difference]: With dead ends: 651 [2024-12-02 07:28:11,189 INFO L226 Difference]: Without dead ends: 605 [2024-12-02 07:28:11,191 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=972, Invalid=10370, Unknown=0, NotChecked=0, Total=11342 [2024-12-02 07:28:11,191 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 156 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:11,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 888 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 07:28:11,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2024-12-02 07:28:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 503. [2024-12-02 07:28:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 499 states have (on average 1.1082164328657316) internal successors, (553), 502 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 553 transitions. [2024-12-02 07:28:11,196 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 553 transitions. Word has length 60 [2024-12-02 07:28:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:11,196 INFO L471 AbstractCegarLoop]: Abstraction has 503 states and 553 transitions. [2024-12-02 07:28:11,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 553 transitions. [2024-12-02 07:28:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-12-02 07:28:11,197 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:11,197 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:11,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 07:28:11,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-12-02 07:28:11,398 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:11,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:11,398 INFO L85 PathProgramCache]: Analyzing trace with hash 628553004, now seen corresponding path program 2 times [2024-12-02 07:28:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71233373] [2024-12-02 07:28:11,398 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:28:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:11,420 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:28:11,420 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71233373] [2024-12-02 07:28:11,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71233373] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318381336] [2024-12-02 07:28:11,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:28:11,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:11,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:11,920 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:11,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 07:28:12,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:28:12,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:12,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-12-02 07:28:12,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:12,470 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 17 treesize of output 13 [2024-12-02 07:28:12,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:12,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2024-12-02 07:28:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:12,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:13,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:28:13,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:28:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 14 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:13,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318381336] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:13,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:13,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 57 [2024-12-02 07:28:13,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263171057] [2024-12-02 07:28:13,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:13,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-12-02 07:28:13,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:13,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-12-02 07:28:13,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2856, Unknown=0, NotChecked=0, Total=3192 [2024-12-02 07:28:13,774 INFO L87 Difference]: Start difference. First operand 503 states and 553 transitions. Second operand has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 57 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:16,897 INFO L93 Difference]: Finished difference Result 606 states and 661 transitions. [2024-12-02 07:28:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-12-02 07:28:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 57 states have internal predecessors, (159), 0 states have call successors, (0), 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 60 [2024-12-02 07:28:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:16,899 INFO L225 Difference]: With dead ends: 606 [2024-12-02 07:28:16,899 INFO L226 Difference]: Without dead ends: 570 [2024-12-02 07:28:16,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1460, Invalid=10096, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 07:28:16,900 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:16,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 875 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:28:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2024-12-02 07:28:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 472. [2024-12-02 07:28:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 468 states have (on average 1.1111111111111112) internal successors, (520), 471 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 520 transitions. [2024-12-02 07:28:16,903 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 520 transitions. Word has length 60 [2024-12-02 07:28:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:16,903 INFO L471 AbstractCegarLoop]: Abstraction has 472 states and 520 transitions. [2024-12-02 07:28:16,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.789473684210526) internal successors, (159), 57 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 520 transitions. [2024-12-02 07:28:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-12-02 07:28:16,904 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:16,904 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:16,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 07:28:17,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-12-02 07:28:17,105 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:17,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -407195720, now seen corresponding path program 8 times [2024-12-02 07:28:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110212776] [2024-12-02 07:28:17,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:28:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:17,120 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:28:17,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110212776] [2024-12-02 07:28:17,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110212776] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298931101] [2024-12-02 07:28:17,802 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:28:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:17,803 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:17,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 07:28:17,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:28:17,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:17,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-12-02 07:28:17,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:18,216 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 [2024-12-02 07:28:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:18,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:18,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:28:18,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:28:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298931101] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:18,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:18,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 52 [2024-12-02 07:28:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589685888] [2024-12-02 07:28:18,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:18,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-12-02 07:28:18,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:18,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-12-02 07:28:18,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2496, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 07:28:18,857 INFO L87 Difference]: Start difference. First operand 472 states and 520 transitions. Second operand has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:22,173 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2024-12-02 07:28:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-12-02 07:28:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 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 64 [2024-12-02 07:28:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:22,174 INFO L225 Difference]: With dead ends: 785 [2024-12-02 07:28:22,174 INFO L226 Difference]: Without dead ends: 705 [2024-12-02 07:28:22,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=754, Invalid=10376, Unknown=0, NotChecked=0, Total=11130 [2024-12-02 07:28:22,175 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 282 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:22,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2318 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3484 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 07:28:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2024-12-02 07:28:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 513. [2024-12-02 07:28:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 509 states have (on average 1.106090373280943) internal successors, (563), 512 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 563 transitions. [2024-12-02 07:28:22,185 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 563 transitions. Word has length 64 [2024-12-02 07:28:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:22,185 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 563 transitions. [2024-12-02 07:28:22,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 563 transitions. [2024-12-02 07:28:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-12-02 07:28:22,186 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:22,186 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1] [2024-12-02 07:28:22,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 07:28:22,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-12-02 07:28:22,386 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:22,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1704436197, now seen corresponding path program 6 times [2024-12-02 07:28:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530747678] [2024-12-02 07:28:22,387 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:28:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:22,408 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 07:28:22,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:28:22,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530747678] [2024-12-02 07:28:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530747678] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:22,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64037947] [2024-12-02 07:28:22,725 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:28:22,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:22,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:22,727 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:22,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 07:28:22,954 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-12-02 07:28:22,955 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:28:22,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 07:28:22,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:22,960 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 [2024-12-02 07:28:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:28:23,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:28:23,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64037947] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:23,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:23,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 36 [2024-12-02 07:28:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402192050] [2024-12-02 07:28:23,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:23,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 07:28:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:23,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 07:28:23,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 07:28:23,448 INFO L87 Difference]: Start difference. First operand 513 states and 563 transitions. Second operand has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:23,823 INFO L93 Difference]: Finished difference Result 591 states and 640 transitions. [2024-12-02 07:28:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 07:28:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 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 65 [2024-12-02 07:28:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:23,825 INFO L225 Difference]: With dead ends: 591 [2024-12-02 07:28:23,825 INFO L226 Difference]: Without dead ends: 591 [2024-12-02 07:28:23,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 07:28:23,825 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:23,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 487 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:28:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2024-12-02 07:28:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 539. [2024-12-02 07:28:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 535 states have (on average 1.102803738317757) internal successors, (590), 538 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 590 transitions. [2024-12-02 07:28:23,831 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 590 transitions. Word has length 65 [2024-12-02 07:28:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:23,831 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 590 transitions. [2024-12-02 07:28:23,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 37 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 590 transitions. [2024-12-02 07:28:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-12-02 07:28:23,832 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:23,832 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:23,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 07:28:24,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 07:28:24,033 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:28:24,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2097540053, now seen corresponding path program 7 times [2024-12-02 07:28:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210825149] [2024-12-02 07:28:24,033 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:28:24,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:26,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:26,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210825149] [2024-12-02 07:28:26,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210825149] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:26,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348895699] [2024-12-02 07:28:26,121 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:28:26,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:26,122 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:26,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 07:28:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:26,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-12-02 07:28:26,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:26,677 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 17 treesize of output 13 [2024-12-02 07:28:53,148 INFO L349 Elim1Store]: treesize reduction 31, result has 56.3 percent of original size [2024-12-02 07:28:53,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 70 [2024-12-02 07:28:53,151 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:28:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 97 refuted. 18 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:53,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:56,800 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 125 treesize of output 111 [2024-12-02 07:28:56,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:56,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 132 treesize of output 106 [2024-12-02 07:28:58,164 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-12-02 07:28:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 90 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348895699] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:58,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2024-12-02 07:28:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106006314] [2024-12-02 07:28:58,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:58,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-12-02 07:28:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:58,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-12-02 07:28:58,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=6262, Unknown=25, NotChecked=0, Total=6972 [2024-12-02 07:28:58,255 INFO L87 Difference]: Start difference. First operand 539 states and 590 transitions. Second operand has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 84 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:07,018 INFO L93 Difference]: Finished difference Result 788 states and 853 transitions. [2024-12-02 07:29:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-12-02 07:29:07,018 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 84 states have internal predecessors, (166), 0 states have call successors, (0), 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 [2024-12-02 07:29:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:07,019 INFO L225 Difference]: With dead ends: 788 [2024-12-02 07:29:07,019 INFO L226 Difference]: Without dead ends: 736 [2024-12-02 07:29:07,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3948 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=1415, Invalid=13073, Unknown=32, NotChecked=0, Total=14520 [2024-12-02 07:29:07,020 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 289 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:07,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1055 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1936 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-12-02 07:29:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2024-12-02 07:29:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 572. [2024-12-02 07:29:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 568 states have (on average 1.1038732394366197) internal successors, (627), 571 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 627 transitions. [2024-12-02 07:29:07,024 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 627 transitions. Word has length 67 [2024-12-02 07:29:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:07,024 INFO L471 AbstractCegarLoop]: Abstraction has 572 states and 627 transitions. [2024-12-02 07:29:07,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 84 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 627 transitions. [2024-12-02 07:29:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-12-02 07:29:07,025 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:07,025 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:07,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 07:29:07,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:07,226 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:29:07,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash -843478802, now seen corresponding path program 3 times [2024-12-02 07:29:07,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:07,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402787699] [2024-12-02 07:29:07,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:29:07,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:07,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 07:29:07,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:29:11,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:11,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402787699] [2024-12-02 07:29:11,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402787699] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663066555] [2024-12-02 07:29:11,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:29:11,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:11,044 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:11,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 07:29:11,365 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 07:29:11,365 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:11,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-12-02 07:29:11,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:29:11,431 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 [2024-12-02 07:29:11,437 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 [2024-12-02 07:29:12,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-12-02 07:29:13,323 INFO L349 Elim1Store]: treesize reduction 4, result has 90.7 percent of original size [2024-12-02 07:29:13,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2024-12-02 07:29:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:29:14,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:15,800 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 33 treesize of output 29 [2024-12-02 07:29:15,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:29:15,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2024-12-02 07:29:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:29:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 07:29:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663066555] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:17,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 25] total 84 [2024-12-02 07:29:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772513383] [2024-12-02 07:29:17,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:17,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-12-02 07:29:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:17,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-12-02 07:29:17,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=6630, Unknown=0, NotChecked=0, Total=7140 [2024-12-02 07:29:17,409 INFO L87 Difference]: Start difference. First operand 572 states and 627 transitions. Second operand has 85 states, 84 states have (on average 2.0) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:29,659 INFO L93 Difference]: Finished difference Result 820 states and 898 transitions. [2024-12-02 07:29:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-12-02 07:29:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.0) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 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 [2024-12-02 07:29:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:29,663 INFO L225 Difference]: With dead ends: 820 [2024-12-02 07:29:29,663 INFO L226 Difference]: Without dead ends: 816 [2024-12-02 07:29:29,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9440 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=2702, Invalid=26710, Unknown=0, NotChecked=0, Total=29412 [2024-12-02 07:29:29,664 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 414 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:29,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 467 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 07:29:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2024-12-02 07:29:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 659. [2024-12-02 07:29:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 655 states have (on average 1.116030534351145) internal successors, (731), 658 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 731 transitions. [2024-12-02 07:29:29,670 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 731 transitions. Word has length 67 [2024-12-02 07:29:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:29,671 INFO L471 AbstractCegarLoop]: Abstraction has 659 states and 731 transitions. [2024-12-02 07:29:29,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.0) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 731 transitions. [2024-12-02 07:29:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-12-02 07:29:29,671 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:29,672 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:29,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 07:29:29,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:29,872 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:29:29,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1165611454, now seen corresponding path program 1 times [2024-12-02 07:29:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145481931] [2024-12-02 07:29:29,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:29:30,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:30,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145481931] [2024-12-02 07:29:30,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145481931] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:30,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23527788] [2024-12-02 07:29:30,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:30,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:30,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:30,500 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:30,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 07:29:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:30,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-12-02 07:29:30,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:31,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-12-02 07:29:31,730 INFO L349 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2024-12-02 07:29:31,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2024-12-02 07:29:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 73 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:29:31,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:32,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2024-12-02 07:29:32,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:29:32,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2024-12-02 07:29:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:29:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23527788] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:33,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 64 [2024-12-02 07:29:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528405349] [2024-12-02 07:29:33,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:33,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 07:29:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:33,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 07:29:33,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=3672, Unknown=1, NotChecked=0, Total=4032 [2024-12-02 07:29:33,116 INFO L87 Difference]: Start difference. First operand 659 states and 731 transitions. Second operand has 64 states, 64 states have (on average 2.78125) internal successors, (178), 64 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:38,080 INFO L93 Difference]: Finished difference Result 760 states and 829 transitions. [2024-12-02 07:29:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-12-02 07:29:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.78125) internal successors, (178), 64 states have internal predecessors, (178), 0 states have call successors, (0), 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 69 [2024-12-02 07:29:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:38,082 INFO L225 Difference]: With dead ends: 760 [2024-12-02 07:29:38,082 INFO L226 Difference]: Without dead ends: 715 [2024-12-02 07:29:38,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3876 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1207, Invalid=11671, Unknown=4, NotChecked=0, Total=12882 [2024-12-02 07:29:38,083 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 366 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:38,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 874 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1729 Invalid, 2 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 07:29:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-12-02 07:29:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 635. [2024-12-02 07:29:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 631 states have (on average 1.1141045958795563) internal successors, (703), 634 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 703 transitions. [2024-12-02 07:29:38,086 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 703 transitions. Word has length 69 [2024-12-02 07:29:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:38,086 INFO L471 AbstractCegarLoop]: Abstraction has 635 states and 703 transitions. [2024-12-02 07:29:38,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.78125) internal successors, (178), 64 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 703 transitions. [2024-12-02 07:29:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-12-02 07:29:38,087 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:38,087 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1] [2024-12-02 07:29:38,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 07:29:38,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 07:29:38,287 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:29:38,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1042785803, now seen corresponding path program 7 times [2024-12-02 07:29:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:38,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428514194] [2024-12-02 07:29:38,288 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:29:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 29 proven. 60 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:29:38,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:38,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428514194] [2024-12-02 07:29:38,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428514194] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:38,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231291347] [2024-12-02 07:29:38,571 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:29:38,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:38,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:38,572 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:38,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 07:29:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:38,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-12-02 07:29:38,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:38,810 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 [2024-12-02 07:29:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:29:38,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:38,979 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 [2024-12-02 07:29:38,980 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 [2024-12-02 07:29:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 07:29:39,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231291347] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:39,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:39,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 34 [2024-12-02 07:29:39,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541808287] [2024-12-02 07:29:39,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:39,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 07:29:39,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:39,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 07:29:39,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 07:29:39,045 INFO L87 Difference]: Start difference. First operand 635 states and 703 transitions. Second operand has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 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) [2024-12-02 07:29:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:40,200 INFO L93 Difference]: Finished difference Result 1105 states and 1195 transitions. [2024-12-02 07:29:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 07:29:40,200 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 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 70 [2024-12-02 07:29:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:40,201 INFO L225 Difference]: With dead ends: 1105 [2024-12-02 07:29:40,201 INFO L226 Difference]: Without dead ends: 902 [2024-12-02 07:29:40,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=5402, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 07:29:40,202 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 150 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:40,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 941 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:29:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2024-12-02 07:29:40,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 736. [2024-12-02 07:29:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 732 states have (on average 1.1120218579234973) internal successors, (814), 735 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 814 transitions. [2024-12-02 07:29:40,207 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 814 transitions. Word has length 70 [2024-12-02 07:29:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:40,207 INFO L471 AbstractCegarLoop]: Abstraction has 736 states and 814 transitions. [2024-12-02 07:29:40,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 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) [2024-12-02 07:29:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 814 transitions. [2024-12-02 07:29:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-12-02 07:29:40,207 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:40,208 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:40,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 07:29:40,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:40,408 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:29:40,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1280041780, now seen corresponding path program 9 times [2024-12-02 07:29:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:40,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552453644] [2024-12-02 07:29:40,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:29:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:40,429 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-12-02 07:29:40,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 66 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:29:41,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552453644] [2024-12-02 07:29:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552453644] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467924600] [2024-12-02 07:29:41,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:29:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:41,180 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:41,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 07:29:41,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-12-02 07:29:41,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:41,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-12-02 07:29:41,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:41,818 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 [2024-12-02 07:29:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 15 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:29:42,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:29:42,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:29:42,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:29:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 15 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:29:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467924600] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:29:42,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:29:42,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 68 [2024-12-02 07:29:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869691708] [2024-12-02 07:29:42,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:42,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-12-02 07:29:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:42,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-12-02 07:29:42,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4309, Unknown=0, NotChecked=0, Total=4556 [2024-12-02 07:29:42,819 INFO L87 Difference]: Start difference. First operand 736 states and 814 transitions. Second operand has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:45,969 INFO L93 Difference]: Finished difference Result 1135 states and 1226 transitions. [2024-12-02 07:29:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-12-02 07:29:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 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 [2024-12-02 07:29:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:45,972 INFO L225 Difference]: With dead ends: 1135 [2024-12-02 07:29:45,972 INFO L226 Difference]: Without dead ends: 1034 [2024-12-02 07:29:45,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=918, Invalid=13124, Unknown=0, NotChecked=0, Total=14042 [2024-12-02 07:29:45,973 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 394 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:45,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1759 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 07:29:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2024-12-02 07:29:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 775. [2024-12-02 07:29:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 771 states have (on average 1.0972762645914398) internal successors, (846), 774 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 846 transitions. [2024-12-02 07:29:45,979 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 846 transitions. Word has length 71 [2024-12-02 07:29:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:45,979 INFO L471 AbstractCegarLoop]: Abstraction has 775 states and 846 transitions. [2024-12-02 07:29:45,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9558823529411766) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:29:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 846 transitions. [2024-12-02 07:29:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-12-02 07:29:45,980 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:45,980 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:45,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 07:29:46,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:46,181 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:29:46,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1096536323, now seen corresponding path program 8 times [2024-12-02 07:29:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50792988] [2024-12-02 07:29:46,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:29:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:46,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:29:46,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 83 proven. 152 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:29:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50792988] [2024-12-02 07:29:48,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50792988] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814964094] [2024-12-02 07:29:48,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:29:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:48,444 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:48,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 07:29:48,614 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:29:48,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:29:48,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-12-02 07:29:48,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:49,166 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 17 treesize of output 13 [2024-12-02 07:30:32,367 INFO L349 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2024-12-02 07:30:32,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2024-12-02 07:30:32,369 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-12-02 07:30:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 61 proven. 127 refuted. 47 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:30:32,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:30:34,901 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 143 treesize of output 127 [2024-12-02 07:30:34,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:30:34,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 121 [2024-12-02 07:30:36,681 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-12-02 07:30:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 115 proven. 120 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:30:36,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814964094] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:30:36,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:30:36,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 91 [2024-12-02 07:30:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157482031] [2024-12-02 07:30:36,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:30:36,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-12-02 07:30:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:30:36,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-12-02 07:30:36,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=7265, Unknown=62, NotChecked=0, Total=8190 [2024-12-02 07:30:36,766 INFO L87 Difference]: Start difference. First operand 775 states and 846 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:30:52,154 INFO L93 Difference]: Finished difference Result 1085 states and 1169 transitions. [2024-12-02 07:30:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 07:30:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 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 74 [2024-12-02 07:30:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:30:52,156 INFO L225 Difference]: With dead ends: 1085 [2024-12-02 07:30:52,156 INFO L226 Difference]: Without dead ends: 1027 [2024-12-02 07:30:52,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=1833, Invalid=15922, Unknown=67, NotChecked=0, Total=17822 [2024-12-02 07:30:52,157 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 183 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:30:52,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 785 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 07:30:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2024-12-02 07:30:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 834. [2024-12-02 07:30:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 830 states have (on average 1.1024096385542168) internal successors, (915), 833 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 915 transitions. [2024-12-02 07:30:52,165 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 915 transitions. Word has length 74 [2024-12-02 07:30:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:30:52,165 INFO L471 AbstractCegarLoop]: Abstraction has 834 states and 915 transitions. [2024-12-02 07:30:52,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:30:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 915 transitions. [2024-12-02 07:30:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-12-02 07:30:52,166 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:30:52,166 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:30:52,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-12-02 07:30:52,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:52,367 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:30:52,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:30:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -954659414, now seen corresponding path program 2 times [2024-12-02 07:30:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:30:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253966752] [2024-12-02 07:30:52,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:30:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:30:52,402 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:30:52,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:30:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:30:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253966752] [2024-12-02 07:30:54,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253966752] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:30:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001992679] [2024-12-02 07:30:54,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:30:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:30:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:30:54,520 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:30:54,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 07:30:54,695 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:30:54,695 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:30:54,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-12-02 07:30:54,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:30:55,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-12-02 07:30:59,182 INFO L349 Elim1Store]: treesize reduction 8, result has 74.2 percent of original size [2024-12-02 07:30:59,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 37 [2024-12-02 07:30:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 100 refuted. 9 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:30:59,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:00,448 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 55 treesize of output 49 [2024-12-02 07:31:00,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:31:00,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 46 [2024-12-02 07:31:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:31:01,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001992679] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:01,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 84 [2024-12-02 07:31:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788408145] [2024-12-02 07:31:01,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:01,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-12-02 07:31:01,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:01,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-12-02 07:31:01,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=6527, Unknown=9, NotChecked=0, Total=6972 [2024-12-02 07:31:01,866 INFO L87 Difference]: Start difference. First operand 834 states and 915 transitions. Second operand has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:16,397 INFO L93 Difference]: Finished difference Result 957 states and 1034 transitions. [2024-12-02 07:31:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-12-02 07:31:16,398 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 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 [2024-12-02 07:31:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:16,399 INFO L225 Difference]: With dead ends: 957 [2024-12-02 07:31:16,399 INFO L226 Difference]: Without dead ends: 874 [2024-12-02 07:31:16,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1860, Invalid=22622, Unknown=10, NotChecked=0, Total=24492 [2024-12-02 07:31:16,400 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 318 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 41 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:16,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1160 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3252 Invalid, 7 Unknown, 0 Unchecked, 5.3s Time] [2024-12-02 07:31:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2024-12-02 07:31:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 784. [2024-12-02 07:31:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 780 states have (on average 1.1012820512820514) internal successors, (859), 783 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2024-12-02 07:31:16,405 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 76 [2024-12-02 07:31:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:16,405 INFO L471 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2024-12-02 07:31:16,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2024-12-02 07:31:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-12-02 07:31:16,406 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:16,406 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:16,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 07:31:16,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:16,607 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:16,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:16,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1159575002, now seen corresponding path program 10 times [2024-12-02 07:31:16,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:16,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626540619] [2024-12-02 07:31:16,607 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:31:16,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:16,627 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:31:16,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626540619] [2024-12-02 07:31:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626540619] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56745502] [2024-12-02 07:31:17,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:31:17,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:17,776 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:17,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 07:31:18,007 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:31:18,007 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:18,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-12-02 07:31:18,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:18,593 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 [2024-12-02 07:31:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 17 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:19,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:19,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:31:19,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:31:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 17 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56745502] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:20,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 76 [2024-12-02 07:31:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367468165] [2024-12-02 07:31:20,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:20,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-12-02 07:31:20,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:20,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-12-02 07:31:20,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5503, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 07:31:20,327 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:26,043 INFO L93 Difference]: Finished difference Result 1446 states and 1573 transitions. [2024-12-02 07:31:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-12-02 07:31:26,043 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 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 78 [2024-12-02 07:31:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:26,045 INFO L225 Difference]: With dead ends: 1446 [2024-12-02 07:31:26,045 INFO L226 Difference]: Without dead ends: 1339 [2024-12-02 07:31:26,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=602, Invalid=16690, Unknown=0, NotChecked=0, Total=17292 [2024-12-02 07:31:26,046 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 351 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 5749 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 5783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 5749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:26,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 3789 Invalid, 5783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 5749 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 07:31:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2024-12-02 07:31:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 998. [2024-12-02 07:31:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 994 states have (on average 1.0995975855130784) internal successors, (1093), 997 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1093 transitions. [2024-12-02 07:31:26,055 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1093 transitions. Word has length 78 [2024-12-02 07:31:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:26,055 INFO L471 AbstractCegarLoop]: Abstraction has 998 states and 1093 transitions. [2024-12-02 07:31:26,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9210526315789473) internal successors, (222), 76 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1093 transitions. [2024-12-02 07:31:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-12-02 07:31:26,056 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:26,056 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:26,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 07:31:26,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:26,257 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:26,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1341253529, now seen corresponding path program 8 times [2024-12-02 07:31:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:26,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507639835] [2024-12-02 07:31:26,257 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:31:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:26,281 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:31:26,281 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:26,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507639835] [2024-12-02 07:31:26,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507639835] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:26,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443000600] [2024-12-02 07:31:26,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:31:26,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:26,682 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:26,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 07:31:26,853 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:31:26,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:26,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-12-02 07:31:26,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:27,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:27,317 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 [2024-12-02 07:31:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443000600] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:27,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:27,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2024-12-02 07:31:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378461395] [2024-12-02 07:31:27,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:27,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 07:31:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:27,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 07:31:27,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:31:27,393 INFO L87 Difference]: Start difference. First operand 998 states and 1093 transitions. Second operand has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:27,807 INFO L93 Difference]: Finished difference Result 1091 states and 1184 transitions. [2024-12-02 07:31:27,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 07:31:27,808 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 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 78 [2024-12-02 07:31:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:27,810 INFO L225 Difference]: With dead ends: 1091 [2024-12-02 07:31:27,810 INFO L226 Difference]: Without dead ends: 1091 [2024-12-02 07:31:27,810 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:31:27,810 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 53 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:27,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 573 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:31:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2024-12-02 07:31:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1029. [2024-12-02 07:31:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1025 states have (on average 1.0975609756097562) internal successors, (1125), 1028 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1125 transitions. [2024-12-02 07:31:27,816 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1125 transitions. Word has length 78 [2024-12-02 07:31:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:27,816 INFO L471 AbstractCegarLoop]: Abstraction has 1029 states and 1125 transitions. [2024-12-02 07:31:27,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.4285714285714284) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1125 transitions. [2024-12-02 07:31:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-12-02 07:31:27,817 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:27,817 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:27,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 07:31:28,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:28,018 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:28,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash -449837273, now seen corresponding path program 9 times [2024-12-02 07:31:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:28,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925353849] [2024-12-02 07:31:28,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:28,062 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 07:31:28,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 106 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:31:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925353849] [2024-12-02 07:31:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925353849] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211645597] [2024-12-02 07:31:31,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:31,178 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:31,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 07:31:31,444 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 07:31:31,444 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:31,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-12-02 07:31:31,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:32,054 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 16 treesize of output 12 [2024-12-02 07:31:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 43 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:31:34,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:35,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 143 [2024-12-02 07:31:35,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 136 [2024-12-02 07:31:35,621 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-12-02 07:31:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 143 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:31:36,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211645597] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:36,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:36,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 98 [2024-12-02 07:31:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926856428] [2024-12-02 07:31:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:36,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-12-02 07:31:36,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:36,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-12-02 07:31:36,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=8703, Unknown=0, NotChecked=0, Total=9506 [2024-12-02 07:31:36,677 INFO L87 Difference]: Start difference. First operand 1029 states and 1125 transitions. Second operand has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:40,388 INFO L93 Difference]: Finished difference Result 1235 states and 1328 transitions. [2024-12-02 07:31:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 07:31:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 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 81 [2024-12-02 07:31:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:40,390 INFO L225 Difference]: With dead ends: 1235 [2024-12-02 07:31:40,390 INFO L226 Difference]: Without dead ends: 1168 [2024-12-02 07:31:40,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7797 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1542, Invalid=19628, Unknown=0, NotChecked=0, Total=21170 [2024-12-02 07:31:40,391 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 271 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:40,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1246 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 07:31:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2024-12-02 07:31:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 973. [2024-12-02 07:31:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 969 states have (on average 1.0970072239422084) internal successors, (1063), 972 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1063 transitions. [2024-12-02 07:31:40,397 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1063 transitions. Word has length 81 [2024-12-02 07:31:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:40,397 INFO L471 AbstractCegarLoop]: Abstraction has 973 states and 1063 transitions. [2024-12-02 07:31:40,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0408163265306123) internal successors, (200), 98 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1063 transitions. [2024-12-02 07:31:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-12-02 07:31:40,398 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:40,398 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:40,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 07:31:40,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-12-02 07:31:40,598 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:40,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 465476365, now seen corresponding path program 11 times [2024-12-02 07:31:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254140753] [2024-12-02 07:31:40,599 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:31:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:40,622 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 07:31:40,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 172 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:41,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:41,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254140753] [2024-12-02 07:31:41,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254140753] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:41,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040595375] [2024-12-02 07:31:41,165 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:31:41,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:41,167 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:41,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 07:31:41,387 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 07:31:41,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:41,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-12-02 07:31:41,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 171 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:41,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:42,159 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 18 [2024-12-02 07:31:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 171 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:31:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040595375] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:42,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:42,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 59 [2024-12-02 07:31:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148411635] [2024-12-02 07:31:42,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:42,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-12-02 07:31:42,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:42,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-12-02 07:31:42,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=3040, Unknown=0, NotChecked=0, Total=3540 [2024-12-02 07:31:42,553 INFO L87 Difference]: Start difference. First operand 973 states and 1063 transitions. Second operand has 60 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:43,754 INFO L93 Difference]: Finished difference Result 1337 states and 1450 transitions. [2024-12-02 07:31:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 07:31:43,754 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 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 82 [2024-12-02 07:31:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:43,756 INFO L225 Difference]: With dead ends: 1337 [2024-12-02 07:31:43,756 INFO L226 Difference]: Without dead ends: 1303 [2024-12-02 07:31:43,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=668, Invalid=4444, Unknown=0, NotChecked=0, Total=5112 [2024-12-02 07:31:43,757 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 386 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:43,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1755 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 07:31:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2024-12-02 07:31:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 991. [2024-12-02 07:31:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 987 states have (on average 1.0962512664640325) internal successors, (1082), 990 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1082 transitions. [2024-12-02 07:31:43,763 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1082 transitions. Word has length 82 [2024-12-02 07:31:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:43,764 INFO L471 AbstractCegarLoop]: Abstraction has 991 states and 1082 transitions. [2024-12-02 07:31:43,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.5762711864406778) internal successors, (211), 60 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1082 transitions. [2024-12-02 07:31:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-12-02 07:31:43,765 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:43,765 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1] [2024-12-02 07:31:43,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 07:31:43,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-12-02 07:31:43,965 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:43,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 892230477, now seen corresponding path program 9 times [2024-12-02 07:31:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862373952] [2024-12-02 07:31:43,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:43,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:43,998 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:31:43,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862373952] [2024-12-02 07:31:44,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862373952] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934506993] [2024-12-02 07:31:44,465 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:44,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:44,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:44,467 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:44,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 07:31:44,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 07:31:44,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:44,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-12-02 07:31:44,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:44,900 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 [2024-12-02 07:31:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:44,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:45,004 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 [2024-12-02 07:31:45,005 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 [2024-12-02 07:31:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934506993] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:31:45,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:31:45,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 35 [2024-12-02 07:31:45,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056538885] [2024-12-02 07:31:45,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:31:45,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 07:31:45,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:31:45,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 07:31:45,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 07:31:45,071 INFO L87 Difference]: Start difference. First operand 991 states and 1082 transitions. Second operand has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:31:45,394 INFO L93 Difference]: Finished difference Result 1465 states and 1594 transitions. [2024-12-02 07:31:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 07:31:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 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 83 [2024-12-02 07:31:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:31:45,398 INFO L225 Difference]: With dead ends: 1465 [2024-12-02 07:31:45,398 INFO L226 Difference]: Without dead ends: 1321 [2024-12-02 07:31:45,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:31:45,398 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 54 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:31:45,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 983 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:31:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2024-12-02 07:31:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1184. [2024-12-02 07:31:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1180 states have (on average 1.0949152542372882) internal successors, (1292), 1183 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1292 transitions. [2024-12-02 07:31:45,406 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1292 transitions. Word has length 83 [2024-12-02 07:31:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:31:45,406 INFO L471 AbstractCegarLoop]: Abstraction has 1184 states and 1292 transitions. [2024-12-02 07:31:45,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.057142857142857) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:31:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1292 transitions. [2024-12-02 07:31:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-12-02 07:31:45,407 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:31:45,407 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:31:45,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 07:31:45,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-12-02 07:31:45,608 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:31:45,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:31:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1652818928, now seen corresponding path program 3 times [2024-12-02 07:31:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:31:45,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645388353] [2024-12-02 07:31:45,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:31:45,643 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 07:31:45,643 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 07:31:50,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:31:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645388353] [2024-12-02 07:31:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645388353] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:31:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374380974] [2024-12-02 07:31:50,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:31:50,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:31:50,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:31:50,411 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:31:50,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 07:31:50,766 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 07:31:50,767 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:31:50,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-12-02 07:31:50,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:31:51,884 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 16 treesize of output 12 [2024-12-02 07:31:53,986 INFO L349 Elim1Store]: treesize reduction 12, result has 87.0 percent of original size [2024-12-02 07:31:53,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 98 [2024-12-02 07:31:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:31:55,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:31:59,151 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 67 treesize of output 59 [2024-12-02 07:31:59,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:31:59,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 133 [2024-12-02 07:32:01,103 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 56 treesize of output 48 [2024-12-02 07:32:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-12-02 07:32:02,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374380974] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:02,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:02,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 37, 35] total 113 [2024-12-02 07:32:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839623123] [2024-12-02 07:32:02,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:02,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-12-02 07:32:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:02,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-12-02 07:32:02,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=12118, Unknown=0, NotChecked=0, Total=12882 [2024-12-02 07:32:02,600 INFO L87 Difference]: Start difference. First operand 1184 states and 1292 transitions. Second operand has 114 states, 113 states have (on average 1.752212389380531) internal successors, (198), 114 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:32:26,188 INFO L93 Difference]: Finished difference Result 1683 states and 1815 transitions. [2024-12-02 07:32:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-12-02 07:32:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.752212389380531) internal successors, (198), 114 states have internal predecessors, (198), 0 states have call successors, (0), 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 83 [2024-12-02 07:32:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:32:26,191 INFO L225 Difference]: With dead ends: 1683 [2024-12-02 07:32:26,191 INFO L226 Difference]: Without dead ends: 1601 [2024-12-02 07:32:26,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16416 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=4195, Invalid=46655, Unknown=0, NotChecked=0, Total=50850 [2024-12-02 07:32:26,193 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 455 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 4581 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:32:26,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 661 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4581 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-12-02 07:32:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2024-12-02 07:32:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1236. [2024-12-02 07:32:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1232 states have (on average 1.1047077922077921) internal successors, (1361), 1235 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1361 transitions. [2024-12-02 07:32:26,200 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1361 transitions. Word has length 83 [2024-12-02 07:32:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:32:26,200 INFO L471 AbstractCegarLoop]: Abstraction has 1236 states and 1361 transitions. [2024-12-02 07:32:26,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.752212389380531) internal successors, (198), 114 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1361 transitions. [2024-12-02 07:32:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-12-02 07:32:26,201 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:32:26,201 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:26,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 07:32:26,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 07:32:26,402 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:32:26,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:26,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1442989090, now seen corresponding path program 12 times [2024-12-02 07:32:26,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:26,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385472335] [2024-12-02 07:32:26,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:32:26,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:26,429 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 07:32:26,430 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 120 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:32:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385472335] [2024-12-02 07:32:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385472335] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540773797] [2024-12-02 07:32:27,429 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:32:27,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:27,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:27,430 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:27,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 07:32:27,714 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 07:32:27,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:27,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-12-02 07:32:27,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:28,248 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 [2024-12-02 07:32:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:32:28,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:29,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:32:29,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:32:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:32:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540773797] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:29,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 80 [2024-12-02 07:32:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493884335] [2024-12-02 07:32:29,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:29,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-12-02 07:32:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:29,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-12-02 07:32:29,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6019, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 07:32:29,805 INFO L87 Difference]: Start difference. First operand 1236 states and 1361 transitions. Second operand has 80 states, 80 states have (on average 3.0375) internal successors, (243), 80 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:32:35,156 INFO L93 Difference]: Finished difference Result 1777 states and 1925 transitions. [2024-12-02 07:32:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-12-02 07:32:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 80 states have internal predecessors, (243), 0 states have call successors, (0), 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 [2024-12-02 07:32:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:32:35,158 INFO L225 Difference]: With dead ends: 1777 [2024-12-02 07:32:35,158 INFO L226 Difference]: Without dead ends: 1664 [2024-12-02 07:32:35,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5361 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1507, Invalid=21445, Unknown=0, NotChecked=0, Total=22952 [2024-12-02 07:32:35,160 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 453 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 3708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:32:35,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 2151 Invalid, 3708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-12-02 07:32:35,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2024-12-02 07:32:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1257. [2024-12-02 07:32:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.094972067039106) internal successors, (1372), 1256 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1372 transitions. [2024-12-02 07:32:35,170 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1372 transitions. Word has length 85 [2024-12-02 07:32:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:32:35,170 INFO L471 AbstractCegarLoop]: Abstraction has 1257 states and 1372 transitions. [2024-12-02 07:32:35,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 80 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1372 transitions. [2024-12-02 07:32:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 07:32:35,171 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:32:35,171 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1] [2024-12-02 07:32:35,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 07:32:35,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 07:32:35,372 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:32:35,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 331238790, now seen corresponding path program 10 times [2024-12-02 07:32:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557629821] [2024-12-02 07:32:35,372 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:32:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:35,402 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:32:35,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:32:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557629821] [2024-12-02 07:32:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557629821] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70196148] [2024-12-02 07:32:35,794 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:32:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:35,795 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:35,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 07:32:36,171 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:32:36,171 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:36,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-12-02 07:32:36,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:32:36,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:36,793 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 21 treesize of output 17 [2024-12-02 07:32:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 07:32:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70196148] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:37,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:37,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2024-12-02 07:32:37,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106921109] [2024-12-02 07:32:37,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:37,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-12-02 07:32:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:37,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-12-02 07:32:37,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1772, Unknown=0, NotChecked=0, Total=1980 [2024-12-02 07:32:37,037 INFO L87 Difference]: Start difference. First operand 1257 states and 1372 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:32:37,645 INFO L93 Difference]: Finished difference Result 1363 states and 1475 transitions. [2024-12-02 07:32:37,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 07:32:37,645 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 0 states have call successors, (0), 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 87 [2024-12-02 07:32:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:32:37,647 INFO L225 Difference]: With dead ends: 1363 [2024-12-02 07:32:37,647 INFO L226 Difference]: Without dead ends: 1363 [2024-12-02 07:32:37,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 07:32:37,647 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:32:37,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1086 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:32:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2024-12-02 07:32:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1288. [2024-12-02 07:32:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1284 states have (on average 1.0934579439252337) internal successors, (1404), 1287 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1404 transitions. [2024-12-02 07:32:37,654 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1404 transitions. Word has length 87 [2024-12-02 07:32:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:32:37,654 INFO L471 AbstractCegarLoop]: Abstraction has 1288 states and 1404 transitions. [2024-12-02 07:32:37,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:32:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1404 transitions. [2024-12-02 07:32:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 07:32:37,655 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:32:37,655 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:32:37,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 07:32:37,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:37,856 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:32:37,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:32:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash 252491766, now seen corresponding path program 4 times [2024-12-02 07:32:37,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:32:37,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177568517] [2024-12-02 07:32:37,856 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:32:37,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:32:37,880 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:32:37,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 132 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 07:32:39,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:32:39,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177568517] [2024-12-02 07:32:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177568517] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:32:39,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060397985] [2024-12-02 07:32:39,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:32:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:32:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:32:39,024 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:32:39,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 07:32:39,454 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:32:39,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:32:39,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-12-02 07:32:39,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:32:40,257 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 17 treesize of output 13 [2024-12-02 07:32:41,275 INFO L349 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2024-12-02 07:32:41,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2024-12-02 07:32:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 8 proven. 152 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:32:41,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:32:42,584 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 37 treesize of output 33 [2024-12-02 07:32:42,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:32:42,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2024-12-02 07:32:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 32 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:32:44,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060397985] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:32:44,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:32:44,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 30] total 86 [2024-12-02 07:32:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28520889] [2024-12-02 07:32:44,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:32:44,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-12-02 07:32:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:32:44,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-12-02 07:32:44,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=6816, Unknown=1, NotChecked=0, Total=7310 [2024-12-02 07:32:44,174 INFO L87 Difference]: Start difference. First operand 1288 states and 1404 transitions. Second operand has 86 states, 86 states have (on average 2.883720930232558) internal successors, (248), 86 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) [2024-12-02 07:33:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:33:04,624 INFO L93 Difference]: Finished difference Result 1472 states and 1585 transitions. [2024-12-02 07:33:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-12-02 07:33:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.883720930232558) internal successors, (248), 86 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 87 [2024-12-02 07:33:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:33:04,626 INFO L225 Difference]: With dead ends: 1472 [2024-12-02 07:33:04,626 INFO L226 Difference]: Without dead ends: 1405 [2024-12-02 07:33:04,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2832, Invalid=33069, Unknown=9, NotChecked=0, Total=35910 [2024-12-02 07:33:04,627 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 708 mSDsluCounter, 2927 mSDsCounter, 0 mSdLazyCounter, 5207 mSolverCounterSat, 106 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3003 SdHoareTripleChecker+Invalid, 5319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 5207 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:33:04,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 3003 Invalid, 5319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 5207 Invalid, 6 Unknown, 0 Unchecked, 5.3s Time] [2024-12-02 07:33:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2024-12-02 07:33:04,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1229. [2024-12-02 07:33:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1225 states have (on average 1.0906122448979592) internal successors, (1336), 1228 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1336 transitions. [2024-12-02 07:33:04,634 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1336 transitions. Word has length 87 [2024-12-02 07:33:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:33:04,635 INFO L471 AbstractCegarLoop]: Abstraction has 1229 states and 1336 transitions. [2024-12-02 07:33:04,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.883720930232558) internal successors, (248), 86 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) [2024-12-02 07:33:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1336 transitions. [2024-12-02 07:33:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-12-02 07:33:04,635 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:33:04,635 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:04,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 07:33:04,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:04,836 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:33:04,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1639425493, now seen corresponding path program 10 times [2024-12-02 07:33:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914851981] [2024-12-02 07:33:04,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:33:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:04,866 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:33:04,866 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 132 proven. 232 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:33:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:08,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914851981] [2024-12-02 07:33:08,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914851981] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201514134] [2024-12-02 07:33:08,399 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:33:08,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:08,400 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:08,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 07:33:08,669 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:33:08,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:08,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-12-02 07:33:08,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:09,385 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 17 treesize of output 13 [2024-12-02 07:33:13,945 INFO L349 Elim1Store]: treesize reduction 43, result has 57.4 percent of original size [2024-12-02 07:33:13,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 100 [2024-12-02 07:33:13,949 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-12-02 07:33:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 48 proven. 316 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:33:13,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:14,983 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 179 treesize of output 159 [2024-12-02 07:33:14,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 151 [2024-12-02 07:33:15,233 WARN L672 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2024-12-02 07:33:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 174 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:33:16,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201514134] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:16,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:16,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 109 [2024-12-02 07:33:16,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119700910] [2024-12-02 07:33:16,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:16,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-12-02 07:33:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:16,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-12-02 07:33:16,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=10790, Unknown=0, NotChecked=0, Total=11772 [2024-12-02 07:33:16,592 INFO L87 Difference]: Start difference. First operand 1229 states and 1336 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 109 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) [2024-12-02 07:33:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:33:24,046 INFO L93 Difference]: Finished difference Result 1674 states and 1802 transitions. [2024-12-02 07:33:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-12-02 07:33:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 109 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 88 [2024-12-02 07:33:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:33:24,050 INFO L225 Difference]: With dead ends: 1674 [2024-12-02 07:33:24,050 INFO L226 Difference]: Without dead ends: 1604 [2024-12-02 07:33:24,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10608 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=2071, Invalid=26999, Unknown=0, NotChecked=0, Total=29070 [2024-12-02 07:33:24,052 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 260 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:33:24,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1854 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3165 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-12-02 07:33:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2024-12-02 07:33:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1286. [2024-12-02 07:33:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1282 states have (on average 1.0912636505460218) internal successors, (1399), 1285 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1399 transitions. [2024-12-02 07:33:24,062 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1399 transitions. Word has length 88 [2024-12-02 07:33:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:33:24,062 INFO L471 AbstractCegarLoop]: Abstraction has 1286 states and 1399 transitions. [2024-12-02 07:33:24,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 109 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) [2024-12-02 07:33:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1399 transitions. [2024-12-02 07:33:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-12-02 07:33:24,063 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:33:24,063 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:24,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-12-02 07:33:24,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:24,264 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:33:24,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1418626984, now seen corresponding path program 4 times [2024-12-02 07:33:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576676885] [2024-12-02 07:33:24,264 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:33:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:24,285 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:33:24,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 36 proven. 89 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:33:24,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576676885] [2024-12-02 07:33:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576676885] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:24,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162571285] [2024-12-02 07:33:24,639 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 07:33:24,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:24,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:24,641 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:24,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 07:33:25,022 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 07:33:25,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:25,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-12-02 07:33:25,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 45 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:33:25,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 59 proven. 66 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-12-02 07:33:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162571285] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:26,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:26,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 53 [2024-12-02 07:33:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830061014] [2024-12-02 07:33:26,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:26,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 07:33:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:26,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 07:33:26,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=2324, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 07:33:26,517 INFO L87 Difference]: Start difference. First operand 1286 states and 1399 transitions. Second operand has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:33:27,564 INFO L93 Difference]: Finished difference Result 1454 states and 1566 transitions. [2024-12-02 07:33:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-12-02 07:33:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 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 88 [2024-12-02 07:33:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:33:27,567 INFO L225 Difference]: With dead ends: 1454 [2024-12-02 07:33:27,567 INFO L226 Difference]: Without dead ends: 1350 [2024-12-02 07:33:27,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=949, Invalid=4601, Unknown=0, NotChecked=0, Total=5550 [2024-12-02 07:33:27,567 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 256 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:33:27,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 503 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:33:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2024-12-02 07:33:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1254. [2024-12-02 07:33:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1250 states have (on average 1.0912) internal successors, (1364), 1253 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1364 transitions. [2024-12-02 07:33:27,574 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1364 transitions. Word has length 88 [2024-12-02 07:33:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:33:27,575 INFO L471 AbstractCegarLoop]: Abstraction has 1254 states and 1364 transitions. [2024-12-02 07:33:27,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4339622641509435) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1364 transitions. [2024-12-02 07:33:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-12-02 07:33:27,576 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:33:27,576 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:27,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-12-02 07:33:27,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:27,776 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:33:27,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash -564184684, now seen corresponding path program 13 times [2024-12-02 07:33:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:27,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483570284] [2024-12-02 07:33:27,777 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:33:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 153 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:28,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483570284] [2024-12-02 07:33:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483570284] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722150611] [2024-12-02 07:33:28,820 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:33:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:28,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:28,822 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:28,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-12-02 07:33:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:33:29,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-12-02 07:33:29,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:29,534 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 [2024-12-02 07:33:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 21 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:30,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:30,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:33:30,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:33:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 21 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722150611] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:30,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 74 [2024-12-02 07:33:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490333000] [2024-12-02 07:33:30,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:30,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-12-02 07:33:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:30,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-12-02 07:33:30,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5168, Unknown=0, NotChecked=0, Total=5402 [2024-12-02 07:33:30,737 INFO L87 Difference]: Start difference. First operand 1254 states and 1364 transitions. Second operand has 74 states, 74 states have (on average 3.108108108108108) internal successors, (230), 74 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:33:35,681 INFO L93 Difference]: Finished difference Result 1893 states and 2037 transitions. [2024-12-02 07:33:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-12-02 07:33:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.108108108108108) internal successors, (230), 74 states have internal predecessors, (230), 0 states have call successors, (0), 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 92 [2024-12-02 07:33:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:33:35,683 INFO L225 Difference]: With dead ends: 1893 [2024-12-02 07:33:35,683 INFO L226 Difference]: Without dead ends: 1774 [2024-12-02 07:33:35,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4841 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1109, Invalid=19771, Unknown=0, NotChecked=0, Total=20880 [2024-12-02 07:33:35,684 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 336 mSDsluCounter, 3854 mSDsCounter, 0 mSdLazyCounter, 5983 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 6000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:33:35,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 3941 Invalid, 6000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5983 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 07:33:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2024-12-02 07:33:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1329. [2024-12-02 07:33:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1325 states have (on average 1.0875471698113208) internal successors, (1441), 1328 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1441 transitions. [2024-12-02 07:33:35,695 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1441 transitions. Word has length 92 [2024-12-02 07:33:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:33:35,695 INFO L471 AbstractCegarLoop]: Abstraction has 1329 states and 1441 transitions. [2024-12-02 07:33:35,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.108108108108108) internal successors, (230), 74 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1441 transitions. [2024-12-02 07:33:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-12-02 07:33:35,696 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:33:35,696 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:35,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-12-02 07:33:35,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:35,896 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:33:35,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:35,897 INFO L85 PathProgramCache]: Analyzing trace with hash -812839124, now seen corresponding path program 5 times [2024-12-02 07:33:35,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282739185] [2024-12-02 07:33:35,897 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:33:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:35,934 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-12-02 07:33:35,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 40 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282739185] [2024-12-02 07:33:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282739185] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451525695] [2024-12-02 07:33:37,911 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:33:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:37,912 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:37,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-12-02 07:33:38,337 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-12-02 07:33:38,337 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:38,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-12-02 07:33:38,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:39,245 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 16 treesize of output 12 [2024-12-02 07:33:39,863 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-12-02 07:33:39,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 31 [2024-12-02 07:33:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 7 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:40,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:33:41,353 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 55 treesize of output 49 [2024-12-02 07:33:41,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:33:41,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 46 [2024-12-02 07:33:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 41 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:33:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451525695] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:33:43,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:33:43,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 104 [2024-12-02 07:33:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784664504] [2024-12-02 07:33:43,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:33:43,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-12-02 07:33:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:33:43,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-12-02 07:33:43,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=9933, Unknown=0, NotChecked=0, Total=10712 [2024-12-02 07:33:43,267 INFO L87 Difference]: Start difference. First operand 1329 states and 1441 transitions. Second operand has 104 states, 104 states have (on average 2.548076923076923) internal successors, (265), 104 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) [2024-12-02 07:33:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:33:52,434 INFO L93 Difference]: Finished difference Result 1519 states and 1624 transitions. [2024-12-02 07:33:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-12-02 07:33:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.548076923076923) internal successors, (265), 104 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) Word has length 94 [2024-12-02 07:33:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:33:52,436 INFO L225 Difference]: With dead ends: 1519 [2024-12-02 07:33:52,436 INFO L226 Difference]: Without dead ends: 1419 [2024-12-02 07:33:52,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10812 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2771, Invalid=32385, Unknown=0, NotChecked=0, Total=35156 [2024-12-02 07:33:52,437 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 608 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 4970 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:33:52,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2854 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4970 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-12-02 07:33:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2024-12-02 07:33:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1264. [2024-12-02 07:33:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1260 states have (on average 1.0865079365079364) internal successors, (1369), 1263 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:33:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1369 transitions. [2024-12-02 07:33:52,443 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1369 transitions. Word has length 94 [2024-12-02 07:33:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:33:52,443 INFO L471 AbstractCegarLoop]: Abstraction has 1264 states and 1369 transitions. [2024-12-02 07:33:52,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.548076923076923) internal successors, (265), 104 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) [2024-12-02 07:33:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1369 transitions. [2024-12-02 07:33:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-12-02 07:33:52,444 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:33:52,444 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:33:52,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-12-02 07:33:52,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-12-02 07:33:52,645 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:33:52,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:33:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 935513465, now seen corresponding path program 11 times [2024-12-02 07:33:52,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:33:52,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134232806] [2024-12-02 07:33:52,645 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:33:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:33:52,691 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 07:33:52,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 286 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:33:56,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:33:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134232806] [2024-12-02 07:33:56,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134232806] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:33:56,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361566123] [2024-12-02 07:33:56,291 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:33:56,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:33:56,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:33:56,292 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:33:56,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-12-02 07:33:56,628 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-12-02 07:33:56,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:33:56,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-12-02 07:33:56,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:33:57,465 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 17 treesize of output 13 [2024-12-02 07:35:46,824 INFO L349 Elim1Store]: treesize reduction 47, result has 57.7 percent of original size [2024-12-02 07:35:46,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 110 [2024-12-02 07:35:46,830 WARN L672 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2024-12-02 07:35:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 134 proven. 241 refuted. 64 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:35:46,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:35:50,682 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 197 treesize of output 175 [2024-12-02 07:35:50,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:35:50,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 208 treesize of output 166 [2024-12-02 07:35:54,066 WARN L672 sPolynomialRelations]: Constructing 2048(two to the power of 11 dual juncts. [2024-12-02 07:35:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 208 proven. 231 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:35:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361566123] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:35:54,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:35:54,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 121 [2024-12-02 07:35:54,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882995163] [2024-12-02 07:35:54,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:35:54,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-12-02 07:35:54,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:35:54,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-12-02 07:35:54,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1360, Invalid=13091, Unknown=69, NotChecked=0, Total=14520 [2024-12-02 07:35:54,299 INFO L87 Difference]: Start difference. First operand 1264 states and 1369 transitions. Second operand has 121 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:35,253 INFO L93 Difference]: Finished difference Result 1837 states and 1972 transitions. [2024-12-02 07:36:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 07:36:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 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 95 [2024-12-02 07:36:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:35,255 INFO L225 Difference]: With dead ends: 1837 [2024-12-02 07:36:35,255 INFO L226 Difference]: Without dead ends: 1761 [2024-12-02 07:36:35,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 154.3s TimeCoverageRelationStatistics Valid=3070, Invalid=29078, Unknown=72, NotChecked=0, Total=32220 [2024-12-02 07:36:35,256 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 299 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:35,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1407 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2973 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-12-02 07:36:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2024-12-02 07:36:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1437. [2024-12-02 07:36:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1433 states have (on average 1.0886252616887648) internal successors, (1560), 1436 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1560 transitions. [2024-12-02 07:36:35,264 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1560 transitions. Word has length 95 [2024-12-02 07:36:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:35,265 INFO L471 AbstractCegarLoop]: Abstraction has 1437 states and 1560 transitions. [2024-12-02 07:36:35,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1560 transitions. [2024-12-02 07:36:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-12-02 07:36:35,265 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:35,266 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:35,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-12-02 07:36:35,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-12-02 07:36:35,466 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:36:35,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -570088094, now seen corresponding path program 5 times [2024-12-02 07:36:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076979089] [2024-12-02 07:36:35,466 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:36:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:35,495 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 07:36:35,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 114 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-12-02 07:36:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076979089] [2024-12-02 07:36:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076979089] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:36:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251486831] [2024-12-02 07:36:35,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:36:35,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:36:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:36:35,955 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:36:35,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-12-02 07:36:36,520 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 07:36:36,520 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:36,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-12-02 07:36:36,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:36:37,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 07:36:37,336 INFO L349 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2024-12-02 07:36:37,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-12-02 07:36:37,499 INFO L349 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2024-12-02 07:36:37,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2024-12-02 07:36:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 40 proven. 144 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:36:37,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:36:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 65 proven. 93 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-12-02 07:36:39,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251486831] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:36:39,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:36:39,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32, 25] total 73 [2024-12-02 07:36:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657407919] [2024-12-02 07:36:39,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:36:39,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-12-02 07:36:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:39,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-12-02 07:36:39,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=4647, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 07:36:39,166 INFO L87 Difference]: Start difference. First operand 1437 states and 1560 transitions. Second operand has 73 states, 73 states have (on average 3.191780821917808) internal successors, (233), 73 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:41,127 INFO L93 Difference]: Finished difference Result 1590 states and 1708 transitions. [2024-12-02 07:36:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-12-02 07:36:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.191780821917808) internal successors, (233), 73 states have internal predecessors, (233), 0 states have call successors, (0), 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 95 [2024-12-02 07:36:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:41,129 INFO L225 Difference]: With dead ends: 1590 [2024-12-02 07:36:41,129 INFO L226 Difference]: Without dead ends: 1440 [2024-12-02 07:36:41,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1274, Invalid=9232, Unknown=0, NotChecked=0, Total=10506 [2024-12-02 07:36:41,130 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 214 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:41,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1264 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 07:36:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2024-12-02 07:36:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1337. [2024-12-02 07:36:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1333 states have (on average 1.0900225056264066) internal successors, (1453), 1336 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1453 transitions. [2024-12-02 07:36:41,136 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1453 transitions. Word has length 95 [2024-12-02 07:36:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:41,136 INFO L471 AbstractCegarLoop]: Abstraction has 1337 states and 1453 transitions. [2024-12-02 07:36:41,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.191780821917808) internal successors, (233), 73 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1453 transitions. [2024-12-02 07:36:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-12-02 07:36:41,137 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:41,137 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:41,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-12-02 07:36:41,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-12-02 07:36:41,338 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:36:41,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1478671982, now seen corresponding path program 6 times [2024-12-02 07:36:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946901147] [2024-12-02 07:36:41,338 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:36:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:41,377 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 07:36:41,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 20 proven. 238 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 07:36:42,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946901147] [2024-12-02 07:36:42,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946901147] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:36:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666316057] [2024-12-02 07:36:42,929 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:36:42,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:36:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:36:42,930 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:36:42,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-12-02 07:36:43,533 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 07:36:43,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:36:43,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-12-02 07:36:43,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:36:44,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 07:36:46,716 INFO L349 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2024-12-02 07:36:46,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 60 treesize of output 67 [2024-12-02 07:36:46,723 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:36:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 2 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:36:46,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:36:49,613 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 109 treesize of output 97 [2024-12-02 07:36:49,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:36:49,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 91 [2024-12-02 07:36:52,830 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-12-02 07:36:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 74 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:36:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666316057] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:36:52,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:36:52,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 42, 41] total 111 [2024-12-02 07:36:52,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198001264] [2024-12-02 07:36:52,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:36:52,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-12-02 07:36:52,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:52,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-12-02 07:36:52,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=11343, Unknown=0, NotChecked=0, Total=12210 [2024-12-02 07:36:52,928 INFO L87 Difference]: Start difference. First operand 1337 states and 1453 transitions. Second operand has 111 states, 111 states have (on average 2.4864864864864864) internal successors, (276), 111 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:08,351 INFO L93 Difference]: Finished difference Result 1696 states and 1823 transitions. [2024-12-02 07:37:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-12-02 07:37:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.4864864864864864) internal successors, (276), 111 states have internal predecessors, (276), 0 states have call successors, (0), 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 95 [2024-12-02 07:37:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:08,353 INFO L225 Difference]: With dead ends: 1696 [2024-12-02 07:37:08,353 INFO L226 Difference]: Without dead ends: 1655 [2024-12-02 07:37:08,354 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13536 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=3734, Invalid=49396, Unknown=0, NotChecked=0, Total=53130 [2024-12-02 07:37:08,355 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 969 mSDsluCounter, 2533 mSDsCounter, 0 mSdLazyCounter, 4974 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 5068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:08,355 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 2608 Invalid, 5068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4974 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-12-02 07:37:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2024-12-02 07:37:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1463. [2024-12-02 07:37:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1459 states have (on average 1.0904729266620974) internal successors, (1591), 1462 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1591 transitions. [2024-12-02 07:37:08,362 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1591 transitions. Word has length 95 [2024-12-02 07:37:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:08,362 INFO L471 AbstractCegarLoop]: Abstraction has 1463 states and 1591 transitions. [2024-12-02 07:37:08,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.4864864864864864) internal successors, (276), 111 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1591 transitions. [2024-12-02 07:37:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-12-02 07:37:08,363 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:08,363 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:08,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-12-02 07:37:08,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:08,563 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:37:08,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1805748752, now seen corresponding path program 14 times [2024-12-02 07:37:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:08,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910043934] [2024-12-02 07:37:08,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:08,584 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:08,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 190 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910043934] [2024-12-02 07:37:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910043934] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854530385] [2024-12-02 07:37:09,794 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:09,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:09,796 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:09,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-12-02 07:37:10,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:10,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:10,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-12-02 07:37:10,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:10,664 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 [2024-12-02 07:37:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 23 proven. 463 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:11,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:11,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:37:11,355 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 20 treesize of output 16 [2024-12-02 07:37:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 23 proven. 463 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:12,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854530385] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:12,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:12,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 77 [2024-12-02 07:37:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493502249] [2024-12-02 07:37:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:12,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-12-02 07:37:12,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:12,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-12-02 07:37:12,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=5591, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 07:37:12,160 INFO L87 Difference]: Start difference. First operand 1463 states and 1591 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 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) [2024-12-02 07:37:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:19,103 INFO L93 Difference]: Finished difference Result 2134 states and 2298 transitions. [2024-12-02 07:37:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-12-02 07:37:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 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 99 [2024-12-02 07:37:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:19,106 INFO L225 Difference]: With dead ends: 2134 [2024-12-02 07:37:19,106 INFO L226 Difference]: Without dead ends: 2014 [2024-12-02 07:37:19,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5745 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1514, Invalid=24246, Unknown=0, NotChecked=0, Total=25760 [2024-12-02 07:37:19,107 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 383 mSDsluCounter, 4246 mSDsCounter, 0 mSdLazyCounter, 6975 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 6997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:19,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 4334 Invalid, 6997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6975 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-12-02 07:37:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2024-12-02 07:37:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1525. [2024-12-02 07:37:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1521 states have (on average 1.0880999342537805) internal successors, (1655), 1524 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 1655 transitions. [2024-12-02 07:37:19,117 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 1655 transitions. Word has length 99 [2024-12-02 07:37:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:19,117 INFO L471 AbstractCegarLoop]: Abstraction has 1525 states and 1655 transitions. [2024-12-02 07:37:19,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 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) [2024-12-02 07:37:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 1655 transitions. [2024-12-02 07:37:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-12-02 07:37:19,118 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:19,118 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 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, 1] [2024-12-02 07:37:19,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-12-02 07:37:19,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:19,319 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:37:19,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash -207251634, now seen corresponding path program 11 times [2024-12-02 07:37:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:19,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164661868] [2024-12-02 07:37:19,319 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:37:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:19,352 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-12-02 07:37:19,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 152 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 07:37:20,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:20,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164661868] [2024-12-02 07:37:20,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164661868] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:20,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536810352] [2024-12-02 07:37:20,022 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 07:37:20,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:20,024 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:20,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-12-02 07:37:21,043 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-12-02 07:37:21,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:21,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-12-02 07:37:21,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:21,177 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 13 treesize of output 9 [2024-12-02 07:37:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 07:37:21,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:21,499 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 [2024-12-02 07:37:21,500 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 [2024-12-02 07:37:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 07:37:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536810352] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:21,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 47 [2024-12-02 07:37:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624898807] [2024-12-02 07:37:21,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:21,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-12-02 07:37:21,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:21,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-12-02 07:37:21,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 07:37:21,594 INFO L87 Difference]: Start difference. First operand 1525 states and 1655 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:24,104 INFO L93 Difference]: Finished difference Result 2456 states and 2625 transitions. [2024-12-02 07:37:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-12-02 07:37:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 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 100 [2024-12-02 07:37:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:24,107 INFO L225 Difference]: With dead ends: 2456 [2024-12-02 07:37:24,107 INFO L226 Difference]: Without dead ends: 1989 [2024-12-02 07:37:24,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3460 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=729, Invalid=11481, Unknown=0, NotChecked=0, Total=12210 [2024-12-02 07:37:24,108 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 196 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:24,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1870 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 07:37:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2024-12-02 07:37:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1720. [2024-12-02 07:37:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1716 states have (on average 1.0874125874125875) internal successors, (1866), 1719 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 1866 transitions. [2024-12-02 07:37:24,118 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 1866 transitions. Word has length 100 [2024-12-02 07:37:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:24,118 INFO L471 AbstractCegarLoop]: Abstraction has 1720 states and 1866 transitions. [2024-12-02 07:37:24,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 1866 transitions. [2024-12-02 07:37:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-12-02 07:37:24,119 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:24,119 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:24,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-12-02 07:37:24,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:24,319 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:37:24,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:24,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1108326858, now seen corresponding path program 7 times [2024-12-02 07:37:24,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:24,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967138348] [2024-12-02 07:37:24,320 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:37:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 30 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:25,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:25,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967138348] [2024-12-02 07:37:25,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967138348] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:25,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807374506] [2024-12-02 07:37:25,372 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:37:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:25,374 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:25,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-12-02 07:37:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:25,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-12-02 07:37:25,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:26,423 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 16 treesize of output 12 [2024-12-02 07:37:26,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:26,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2024-12-02 07:37:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 44 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:27,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:28,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:37:28,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:37:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807374506] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:30,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:30,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 91 [2024-12-02 07:37:30,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670115148] [2024-12-02 07:37:30,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:30,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-12-02 07:37:30,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:30,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-12-02 07:37:30,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=7507, Unknown=0, NotChecked=0, Total=8190 [2024-12-02 07:37:30,524 INFO L87 Difference]: Start difference. First operand 1720 states and 1866 transitions. Second operand has 91 states, 91 states have (on average 3.0549450549450547) internal successors, (278), 91 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:36,057 INFO L93 Difference]: Finished difference Result 1839 states and 1985 transitions. [2024-12-02 07:37:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-12-02 07:37:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.0549450549450547) internal successors, (278), 91 states have internal predecessors, (278), 0 states have call successors, (0), 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 100 [2024-12-02 07:37:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:36,060 INFO L225 Difference]: With dead ends: 1839 [2024-12-02 07:37:36,060 INFO L226 Difference]: Without dead ends: 1784 [2024-12-02 07:37:36,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6263 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1884, Invalid=19872, Unknown=0, NotChecked=0, Total=21756 [2024-12-02 07:37:36,061 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 378 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3520 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 3575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:36,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2037 Invalid, 3575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3520 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-12-02 07:37:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-12-02 07:37:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1680. [2024-12-02 07:37:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1676 states have (on average 1.0889021479713603) internal successors, (1825), 1679 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 1825 transitions. [2024-12-02 07:37:36,069 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 1825 transitions. Word has length 100 [2024-12-02 07:37:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:36,069 INFO L471 AbstractCegarLoop]: Abstraction has 1680 states and 1825 transitions. [2024-12-02 07:37:36,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.0549450549450547) internal successors, (278), 91 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:36,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 1825 transitions. [2024-12-02 07:37:36,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-12-02 07:37:36,070 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:36,070 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:36,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-12-02 07:37:36,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:36,271 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:37:36,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1538484856, now seen corresponding path program 8 times [2024-12-02 07:37:36,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:36,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495756072] [2024-12-02 07:37:36,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:36,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:36,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:36,313 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 21 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:39,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495756072] [2024-12-02 07:37:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495756072] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387217947] [2024-12-02 07:37:39,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:39,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:39,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:39,927 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:39,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-12-02 07:37:40,217 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:40,217 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:40,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-12-02 07:37:40,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:41,497 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 17 treesize of output 13 [2024-12-02 07:37:52,226 INFO L349 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2024-12-02 07:37:52,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 47 [2024-12-02 07:37:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 7 proven. 237 refuted. 16 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:52,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:54,541 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 73 treesize of output 65 [2024-12-02 07:37:54,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:54,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 61 [2024-12-02 07:37:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 53 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:57,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387217947] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:57,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:57,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 38] total 111 [2024-12-02 07:37:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919657912] [2024-12-02 07:37:57,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:57,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-12-02 07:37:57,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:57,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-12-02 07:37:57,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=11366, Unknown=23, NotChecked=0, Total=12210 [2024-12-02 07:37:57,360 INFO L87 Difference]: Start difference. First operand 1680 states and 1825 transitions. Second operand has 111 states, 111 states have (on average 2.5135135135135136) internal successors, (279), 111 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:39:19,964 INFO L93 Difference]: Finished difference Result 1937 states and 2085 transitions. [2024-12-02 07:39:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-12-02 07:39:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.5135135135135136) internal successors, (279), 111 states have internal predecessors, (279), 0 states have call successors, (0), 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 101 [2024-12-02 07:39:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:39:19,967 INFO L225 Difference]: With dead ends: 1937 [2024-12-02 07:39:19,967 INFO L226 Difference]: Without dead ends: 1937 [2024-12-02 07:39:19,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12649 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=3151, Invalid=43619, Unknown=102, NotChecked=0, Total=46872 [2024-12-02 07:39:19,969 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 495 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 5756 mSolverCounterSat, 61 mSolverCounterUnsat, 64 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 5881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 5756 IncrementalHoareTripleChecker+Invalid, 64 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:39:19,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 2323 Invalid, 5881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 5756 Invalid, 64 Unknown, 0 Unchecked, 31.1s Time] [2024-12-02 07:39:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2024-12-02 07:39:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1688. [2024-12-02 07:39:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1684 states have (on average 1.089667458432304) internal successors, (1835), 1687 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 1835 transitions. [2024-12-02 07:39:19,980 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 1835 transitions. Word has length 101 [2024-12-02 07:39:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:39:19,980 INFO L471 AbstractCegarLoop]: Abstraction has 1688 states and 1835 transitions. [2024-12-02 07:39:19,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.5135135135135136) internal successors, (279), 111 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 1835 transitions. [2024-12-02 07:39:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-12-02 07:39:19,981 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:39:19,981 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:39:19,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-12-02 07:39:20,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:39:20,182 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:39:20,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:39:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1792895577, now seen corresponding path program 12 times [2024-12-02 07:39:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:39:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847558761] [2024-12-02 07:39:20,182 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:39:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:39:20,247 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 07:39:20,247 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:39:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 193 proven. 328 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:39:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:39:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847558761] [2024-12-02 07:39:24,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847558761] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:39:24,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676118212] [2024-12-02 07:39:24,263 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:39:24,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:39:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:39:24,264 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:39:24,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-12-02 07:39:25,041 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 07:39:25,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:39:25,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-12-02 07:39:25,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:39:25,413 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 16 treesize of output 12 [2024-12-02 07:39:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 58 proven. 463 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:39:29,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:39:31,088 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 215 treesize of output 191 [2024-12-02 07:39:31,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 181 [2024-12-02 07:39:31,397 WARN L672 sPolynomialRelations]: Constructing 4096(two to the power of 12 dual juncts. [2024-12-02 07:39:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 245 proven. 276 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:39:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676118212] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:39:33,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:39:33,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 112 [2024-12-02 07:39:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24922941] [2024-12-02 07:39:33,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:39:33,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-12-02 07:39:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:39:33,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-12-02 07:39:33,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=11185, Unknown=0, NotChecked=0, Total=12432 [2024-12-02 07:39:33,211 INFO L87 Difference]: Start difference. First operand 1688 states and 1835 transitions. Second operand has 112 states, 112 states have (on average 1.8839285714285714) internal successors, (211), 112 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:39:38,428 INFO L93 Difference]: Finished difference Result 2274 states and 2445 transitions. [2024-12-02 07:39:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 07:39:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.8839285714285714) internal successors, (211), 112 states have internal predecessors, (211), 0 states have call successors, (0), 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 102 [2024-12-02 07:39:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:39:38,430 INFO L225 Difference]: With dead ends: 2274 [2024-12-02 07:39:38,431 INFO L226 Difference]: Without dead ends: 2192 [2024-12-02 07:39:38,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9130 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2129, Invalid=22993, Unknown=0, NotChecked=0, Total=25122 [2024-12-02 07:39:38,432 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 320 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:39:38,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1355 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 07:39:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2024-12-02 07:39:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1757. [2024-12-02 07:39:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1753 states have (on average 1.0901312036508841) internal successors, (1911), 1756 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 1911 transitions. [2024-12-02 07:39:38,442 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 1911 transitions. Word has length 102 [2024-12-02 07:39:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:39:38,442 INFO L471 AbstractCegarLoop]: Abstraction has 1757 states and 1911 transitions. [2024-12-02 07:39:38,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.8839285714285714) internal successors, (211), 112 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:39:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 1911 transitions. [2024-12-02 07:39:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-12-02 07:39:38,443 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:39:38,443 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:39:38,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-12-02 07:39:38,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:39:38,644 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:39:38,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:39:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 980505654, now seen corresponding path program 9 times [2024-12-02 07:39:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:39:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120057616] [2024-12-02 07:39:38,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:39:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:39:38,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 07:39:38,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:39:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 169 proven. 137 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 07:39:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:39:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120057616] [2024-12-02 07:39:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120057616] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:39:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011897457] [2024-12-02 07:39:41,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:39:41,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:39:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:39:41,683 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:39:41,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-12-02 07:39:42,255 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 07:39:42,256 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:39:42,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-12-02 07:39:42,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:39:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:39:42,353 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 [2024-12-02 07:39:42,358 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 [2024-12-02 07:39:43,083 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 18 treesize of output 14 [2024-12-02 07:39:45,300 INFO L349 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2024-12-02 07:39:45,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 70 treesize of output 91 [2024-12-02 07:39:45,969 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-12-02 07:39:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 1 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 07:39:46,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:39:50,032 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 141 treesize of output 127 [2024-12-02 07:39:50,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 176 [2024-12-02 07:39:52,525 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:39:52,697 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-12-02 07:39:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 07:39:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011897457] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:39:52,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:39:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36, 37] total 110 [2024-12-02 07:39:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233779439] [2024-12-02 07:39:52,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:39:52,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-12-02 07:39:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:39:52,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-12-02 07:39:52,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=11200, Unknown=0, NotChecked=0, Total=12210 [2024-12-02 07:39:52,838 INFO L87 Difference]: Start difference. First operand 1757 states and 1911 transitions. Second operand has 111 states, 110 states have (on average 2.018181818181818) internal successors, (222), 111 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:22,427 INFO L93 Difference]: Finished difference Result 2676 states and 2941 transitions. [2024-12-02 07:40:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2024-12-02 07:40:22,428 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 2.018181818181818) internal successors, (222), 111 states have internal predecessors, (222), 0 states have call successors, (0), 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 102 [2024-12-02 07:40:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:22,431 INFO L225 Difference]: With dead ends: 2676 [2024-12-02 07:40:22,431 INFO L226 Difference]: Without dead ends: 2536 [2024-12-02 07:40:22,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26173 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=7877, Invalid=67473, Unknown=0, NotChecked=0, Total=75350 [2024-12-02 07:40:22,435 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 711 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 5893 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 6001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 5893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:22,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 618 Invalid, 6001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 5893 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-12-02 07:40:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2024-12-02 07:40:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1661. [2024-12-02 07:40:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1657 states have (on average 1.1249245624622812) internal successors, (1864), 1660 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 1864 transitions. [2024-12-02 07:40:22,467 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 1864 transitions. Word has length 102 [2024-12-02 07:40:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:22,468 INFO L471 AbstractCegarLoop]: Abstraction has 1661 states and 1864 transitions. [2024-12-02 07:40:22,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 2.018181818181818) internal successors, (222), 111 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 1864 transitions. [2024-12-02 07:40:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-12-02 07:40:22,469 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:22,469 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:22,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-12-02 07:40:22,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-12-02 07:40:22,670 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:40:22,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1015275560, now seen corresponding path program 6 times [2024-12-02 07:40:22,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:40:22,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288589808] [2024-12-02 07:40:22,671 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:40:22,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:40:22,743 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 07:40:22,743 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:40:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 42 proven. 224 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:40:26,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:40:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288589808] [2024-12-02 07:40:26,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288589808] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:40:26,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024293844] [2024-12-02 07:40:26,711 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 07:40:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:26,713 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-12-02 07:40:27,903 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-12-02 07:40:27,903 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:40:27,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-12-02 07:40:27,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:29,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-12-02 07:40:30,947 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-12-02 07:40:30,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 39 [2024-12-02 07:40:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 16 proven. 250 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:40:31,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:40:34,130 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 73 treesize of output 65 [2024-12-02 07:40:34,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:40:34,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 61 [2024-12-02 07:40:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 74 proven. 192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:40:37,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024293844] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:40:37,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:40:37,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 43, 39] total 126 [2024-12-02 07:40:37,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357427503] [2024-12-02 07:40:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:40:37,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-12-02 07:40:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:40:37,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-12-02 07:40:37,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=14845, Unknown=0, NotChecked=0, Total=15750 [2024-12-02 07:40:37,509 INFO L87 Difference]: Start difference. First operand 1661 states and 1864 transitions. Second operand has 126 states, 126 states have (on average 2.2857142857142856) internal successors, (288), 126 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) [2024-12-02 07:40:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:52,793 INFO L93 Difference]: Finished difference Result 1844 states and 2033 transitions. [2024-12-02 07:40:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-12-02 07:40:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.2857142857142856) internal successors, (288), 126 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) Word has length 103 [2024-12-02 07:40:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:52,794 INFO L225 Difference]: With dead ends: 1844 [2024-12-02 07:40:52,794 INFO L226 Difference]: Without dead ends: 1633 [2024-12-02 07:40:52,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16954 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=3237, Invalid=50355, Unknown=0, NotChecked=0, Total=53592 [2024-12-02 07:40:52,796 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 445 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 5964 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 5994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:52,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1850 Invalid, 5994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5964 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-12-02 07:40:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2024-12-02 07:40:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1505. [2024-12-02 07:40:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1501 states have (on average 1.127914723517655) internal successors, (1693), 1504 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1693 transitions. [2024-12-02 07:40:52,804 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1693 transitions. Word has length 103 [2024-12-02 07:40:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:52,804 INFO L471 AbstractCegarLoop]: Abstraction has 1505 states and 1693 transitions. [2024-12-02 07:40:52,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.2857142857142856) internal successors, (288), 126 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) [2024-12-02 07:40:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1693 transitions. [2024-12-02 07:40:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-12-02 07:40:52,805 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:52,805 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:52,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-12-02 07:40:53,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:53,005 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:40:53,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash -922706430, now seen corresponding path program 15 times [2024-12-02 07:40:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:40:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66392830] [2024-12-02 07:40:53,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:40:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:40:53,043 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-12-02 07:40:53,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:40:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:54,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:40:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66392830] [2024-12-02 07:40:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66392830] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:40:54,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531646642] [2024-12-02 07:40:54,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 07:40:54,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:54,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:54,297 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:54,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-12-02 07:40:54,708 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-12-02 07:40:54,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:40:54,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-12-02 07:40:54,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:55,409 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 11 treesize of output 7 [2024-12-02 07:40:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:56,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:40:56,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-12-02 07:40:56,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-12-02 07:40:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:57,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531646642] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:40:57,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:40:57,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35, 35] total 97 [2024-12-02 07:40:57,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445538454] [2024-12-02 07:40:57,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:40:57,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 07:40:57,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:40:57,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 07:40:57,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=8904, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 07:40:57,587 INFO L87 Difference]: Start difference. First operand 1505 states and 1693 transitions. Second operand has 97 states, 97 states have (on average 3.1443298969072164) internal successors, (305), 97 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:41:02,253 INFO L93 Difference]: Finished difference Result 1738 states and 1931 transitions. [2024-12-02 07:41:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-12-02 07:41:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.1443298969072164) internal successors, (305), 97 states have internal predecessors, (305), 0 states have call successors, (0), 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 106 [2024-12-02 07:41:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:41:02,254 INFO L225 Difference]: With dead ends: 1738 [2024-12-02 07:41:02,254 INFO L226 Difference]: Without dead ends: 1635 [2024-12-02 07:41:02,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6228 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1366, Invalid=23126, Unknown=0, NotChecked=0, Total=24492 [2024-12-02 07:41:02,256 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 296 mSDsluCounter, 2602 mSDsCounter, 0 mSdLazyCounter, 4296 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:41:02,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2659 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4296 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-12-02 07:41:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2024-12-02 07:41:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1580. [2024-12-02 07:41:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1576 states have (on average 1.12246192893401) internal successors, (1769), 1579 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 1769 transitions. [2024-12-02 07:41:02,264 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 1769 transitions. Word has length 106 [2024-12-02 07:41:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:41:02,264 INFO L471 AbstractCegarLoop]: Abstraction has 1580 states and 1769 transitions. [2024-12-02 07:41:02,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.1443298969072164) internal successors, (305), 97 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 1769 transitions. [2024-12-02 07:41:02,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-12-02 07:41:02,265 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:41:02,265 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:41:02,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-12-02 07:41:02,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-12-02 07:41:02,465 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 07:41:02,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1505552192, now seen corresponding path program 13 times [2024-12-02 07:41:02,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:41:02,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798072287] [2024-12-02 07:41:02,466 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:41:02,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:41:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:03,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:41:03,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798072287] [2024-12-02 07:41:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798072287] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:41:03,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537089741] [2024-12-02 07:41:03,931 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 07:41:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:03,932 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:41:03,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f50b680-c8a9-437a-9edf-8e25ed506382/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-12-02 07:41:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:04,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-12-02 07:41:04,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:41:05,145 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 17 treesize of output 13