./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-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_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:19:06,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:19:06,129 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:19:06,135 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:19:06,136 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:19:06,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:19:06,186 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:19:06,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:19:06,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:19:06,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:19:06,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:19:06,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:19:06,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:19:06,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:19:06,191 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:19:06,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:19:06,191 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:19:06,192 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:19:06,193 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:19:06,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:06,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:06,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:19:06,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:19:06,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:19:06,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:19:06,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:19:06,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:19:06,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:19:06,196 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_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2024-11-28 03:19:06,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:19:06,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:19:06,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:19:06,592 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:19:06,592 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:19:06,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-11-28 03:19:09,904 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac20c3574/2dcec98944af44b492b5254cdd02a098/FLAG9ea227237 [2024-11-28 03:19:10,432 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:19:10,433 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-11-28 03:19:10,453 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac20c3574/2dcec98944af44b492b5254cdd02a098/FLAG9ea227237 [2024-11-28 03:19:10,482 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac20c3574/2dcec98944af44b492b5254cdd02a098 [2024-11-28 03:19:10,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:19:10,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:19:10,490 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:10,490 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:19:10,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:19:10,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:10" (1/1) ... [2024-11-28 03:19:10,498 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5a74b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:10, skipping insertion in model container [2024-11-28 03:19:10,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:10" (1/1) ... [2024-11-28 03:19:10,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:19:10,966 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:19:10,967 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:19:10,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:10,990 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:19:11,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:19:11,100 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:19:11,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11 WrapperNode [2024-11-28 03:19:11,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:19:11,103 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:11,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:19:11,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:19:11,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,158 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-28 03:19:11,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:19:11,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:19:11,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:19:11,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:19:11,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,176 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,204 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [3, 1]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [2, 1]. [2024-11-28 03:19:11,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,213 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:19:11,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:19:11,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:19:11,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:19:11,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (1/1) ... [2024-11-28 03:19:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:19:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:11,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:19:11,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:19:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:19:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:19:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:19:11,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:19:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 03:19:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 03:19:11,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:19:11,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:19:11,463 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:19:11,466 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:19:11,710 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-28 03:19:11,710 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:19:11,730 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:19:11,731 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-28 03:19:11,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:11 BoogieIcfgContainer [2024-11-28 03:19:11,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:19:11,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:19:11,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:19:11,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:19:11,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:10" (1/3) ... [2024-11-28 03:19:11,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121bfdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:11, skipping insertion in model container [2024-11-28 03:19:11,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:11" (2/3) ... [2024-11-28 03:19:11,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121bfdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:11, skipping insertion in model container [2024-11-28 03:19:11,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:11" (3/3) ... [2024-11-28 03:19:11,749 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2024-11-28 03:19:11,774 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:19:11,776 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcpy-alloca-2.i that has 1 procedures, 30 locations, 1 initial locations, 2 loop locations, and 9 error locations. [2024-11-28 03:19:11,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:19:11,860 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;@7aa4a8b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:19:11,861 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-28 03:19:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 03:19:11,875 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:11,876 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:19:11,876 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:11,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 889510841, now seen corresponding path program 1 times [2024-11-28 03:19:11,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:11,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18522770] [2024-11-28 03:19:11,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:11,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:12,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18522770] [2024-11-28 03:19:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18522770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060069257] [2024-11-28 03:19:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:12,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:12,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:12,244 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:12,352 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-28 03:19:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:12,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-11-28 03:19:12,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:12,363 INFO L225 Difference]: With dead ends: 31 [2024-11-28 03:19:12,364 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 03:19:12,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:12,371 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:12,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 03:19:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-28 03:19:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.65) internal successors, (33), 28 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) [2024-11-28 03:19:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-28 03:19:12,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-28 03:19:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:12,416 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-28 03:19:12,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-28 03:19:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 03:19:12,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:12,418 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:19:12,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:19:12,419 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:12,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 889512763, now seen corresponding path program 1 times [2024-11-28 03:19:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935709840] [2024-11-28 03:19:12,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:12,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935709840] [2024-11-28 03:19:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935709840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717390726] [2024-11-28 03:19:12,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:12,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:12,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:12,543 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:12,591 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-28 03:19:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-11-28 03:19:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:12,593 INFO L225 Difference]: With dead ends: 30 [2024-11-28 03:19:12,593 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 03:19:12,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:12,595 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:12,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 03:19:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-28 03:19:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 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) [2024-11-28 03:19:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-28 03:19:12,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2024-11-28 03:19:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:12,602 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-28 03:19:12,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-28 03:19:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:12,602 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:12,602 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:12,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:19:12,603 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:12,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:12,603 INFO L85 PathProgramCache]: Analyzing trace with hash 121448370, now seen corresponding path program 1 times [2024-11-28 03:19:12,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:12,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917079965] [2024-11-28 03:19:12,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:12,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:12,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917079965] [2024-11-28 03:19:12,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917079965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:12,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598764055] [2024-11-28 03:19:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:12,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:12,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:12,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:12,740 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:12,786 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-28 03:19:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:12,790 INFO L225 Difference]: With dead ends: 33 [2024-11-28 03:19:12,790 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 03:19:12,790 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 [2024-11-28 03:19:12,791 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:12,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 03:19:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-11-28 03:19:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 29 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) [2024-11-28 03:19:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-28 03:19:12,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-11-28 03:19:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:12,799 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-28 03:19:12,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-28 03:19:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:12,802 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:12,802 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:12,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:19:12,803 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:12,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash 121450547, now seen corresponding path program 1 times [2024-11-28 03:19:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:12,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491170228] [2024-11-28 03:19:12,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:12,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:12,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:12,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491170228] [2024-11-28 03:19:12,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491170228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:12,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:12,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:19:12,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361261918] [2024-11-28 03:19:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:12,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:19:12,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:12,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:19:12,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:12,988 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:13,044 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-28 03:19:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:19:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:13,046 INFO L225 Difference]: With dead ends: 28 [2024-11-28 03:19:13,046 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 03:19:13,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:19:13,049 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 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 [2024-11-28 03:19:13,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 03:19:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 03:19:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 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) [2024-11-28 03:19:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-28 03:19:13,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2024-11-28 03:19:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:13,059 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-28 03:19:13,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-28 03:19:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:13,060 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:13,060 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:13,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:19:13,061 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:13,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 121450548, now seen corresponding path program 1 times [2024-11-28 03:19:13,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:13,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901451739] [2024-11-28 03:19:13,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:13,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901451739] [2024-11-28 03:19:13,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901451739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:13,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748057284] [2024-11-28 03:19:13,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:13,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:13,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:13,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:13,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:13,441 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:13,496 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-28 03:19:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:13,501 INFO L225 Difference]: With dead ends: 30 [2024-11-28 03:19:13,501 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 03:19:13,502 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 [2024-11-28 03:19:13,502 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:13,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 03:19:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 03:19:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 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) [2024-11-28 03:19:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-28 03:19:13,511 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-11-28 03:19:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:13,511 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-28 03:19:13,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-28 03:19:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:13,512 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:13,512 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:13,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:19:13,513 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:13,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 123295412, now seen corresponding path program 1 times [2024-11-28 03:19:13,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:13,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407130325] [2024-11-28 03:19:13,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:13,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407130325] [2024-11-28 03:19:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407130325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:13,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891905931] [2024-11-28 03:19:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:13,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:13,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:13,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:13,625 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:13,671 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-28 03:19:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:13,672 INFO L225 Difference]: With dead ends: 35 [2024-11-28 03:19:13,672 INFO L226 Difference]: Without dead ends: 35 [2024-11-28 03:19:13,673 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 [2024-11-28 03:19:13,673 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:13,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-28 03:19:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-11-28 03:19:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-28 03:19:13,685 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-11-28 03:19:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:13,686 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-28 03:19:13,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-28 03:19:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:13,686 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:13,686 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:13,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:19:13,687 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:13,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 123297590, now seen corresponding path program 1 times [2024-11-28 03:19:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:13,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448084844] [2024-11-28 03:19:13,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:14,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448084844] [2024-11-28 03:19:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448084844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:14,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750842414] [2024-11-28 03:19:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:14,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:14,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:14,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:14,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:14,019 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:14,060 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-28 03:19:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:14,062 INFO L225 Difference]: With dead ends: 32 [2024-11-28 03:19:14,062 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 03:19:14,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:14,063 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:14,063 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 03:19:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-11-28 03:19:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 03:19:14,068 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2024-11-28 03:19:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:14,068 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 03:19:14,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 03:19:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 03:19:14,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:14,069 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:19:14,070 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:14,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash 180553714, now seen corresponding path program 1 times [2024-11-28 03:19:14,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:14,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686652848] [2024-11-28 03:19:14,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686652848] [2024-11-28 03:19:14,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686652848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:14,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:14,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537835253] [2024-11-28 03:19:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:14,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:14,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:14,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:14,320 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:14,430 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-11-28 03:19:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-28 03:19:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:14,433 INFO L225 Difference]: With dead ends: 32 [2024-11-28 03:19:14,433 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 03:19:14,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:14,434 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:14,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 03:19:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-28 03:19:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 03:19:14,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2024-11-28 03:19:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:14,445 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 03:19:14,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 03:19:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:19:14,446 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:14,446 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:19:14,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:14,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 749859031, now seen corresponding path program 1 times [2024-11-28 03:19:14,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:14,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092216820] [2024-11-28 03:19:14,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:14,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:14,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092216820] [2024-11-28 03:19:14,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092216820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:14,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848209278] [2024-11-28 03:19:14,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:14,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:14,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:14,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:14,545 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:14,602 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-28 03:19:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:19:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:14,603 INFO L225 Difference]: With dead ends: 30 [2024-11-28 03:19:14,603 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 03:19:14,603 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:14,604 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:14,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 03:19:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 03:19:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-28 03:19:14,613 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2024-11-28 03:19:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:14,613 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-28 03:19:14,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-28 03:19:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:19:14,615 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:14,615 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:19:14,615 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:14,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash 749859032, now seen corresponding path program 1 times [2024-11-28 03:19:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:14,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205201064] [2024-11-28 03:19:14,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205201064] [2024-11-28 03:19:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205201064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:19:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837415146] [2024-11-28 03:19:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:14,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:19:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:14,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:19:14,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:14,827 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:14,936 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-28 03:19:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:19:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 03:19:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:14,938 INFO L225 Difference]: With dead ends: 40 [2024-11-28 03:19:14,938 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 03:19:14,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:14,939 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:14,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 03:19:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2024-11-28 03:19:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 03:19:14,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2024-11-28 03:19:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:14,948 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 03:19:14,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 03:19:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:19:14,949 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:14,949 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:14,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 03:19:14,949 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:14,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793499, now seen corresponding path program 1 times [2024-11-28 03:19:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:14,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761408301] [2024-11-28 03:19:14,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761408301] [2024-11-28 03:19:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761408301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:15,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:15,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:15,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484689961] [2024-11-28 03:19:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:15,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:15,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:15,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:15,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,146 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:15,200 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-28 03:19:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 03:19:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:15,202 INFO L225 Difference]: With dead ends: 30 [2024-11-28 03:19:15,202 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 03:19:15,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,203 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:15,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 03:19:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 03:19:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-11-28 03:19:15,212 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2024-11-28 03:19:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:15,213 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-11-28 03:19:15,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-11-28 03:19:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:19:15,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:15,214 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:15,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 03:19:15,214 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:15,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793500, now seen corresponding path program 1 times [2024-11-28 03:19:15,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:15,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614487557] [2024-11-28 03:19:15,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:15,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614487557] [2024-11-28 03:19:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614487557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:19:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732559909] [2024-11-28 03:19:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:15,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:19:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:15,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:19:15,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,525 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:15,589 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-28 03:19:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:19:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 03:19:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:15,590 INFO L225 Difference]: With dead ends: 41 [2024-11-28 03:19:15,590 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 03:19:15,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:19:15,591 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:15,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 03:19:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-11-28 03:19:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-28 03:19:15,597 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 11 [2024-11-28 03:19:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:15,597 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-28 03:19:15,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-28 03:19:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 03:19:15,599 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:15,599 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:15,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:19:15,599 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:15,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1844115426, now seen corresponding path program 1 times [2024-11-28 03:19:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:15,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172479079] [2024-11-28 03:19:15,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:15,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172479079] [2024-11-28 03:19:15,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172479079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:15,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:19:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779726912] [2024-11-28 03:19:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:15,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:19:15,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:15,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:19:15,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:15,879 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:15,943 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-11-28 03:19:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:19:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 03:19:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:15,945 INFO L225 Difference]: With dead ends: 42 [2024-11-28 03:19:15,945 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 03:19:15,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:19:15,946 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:15,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 03:19:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-11-28 03:19:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-28 03:19:15,954 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2024-11-28 03:19:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:15,954 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-28 03:19:15,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-28 03:19:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 03:19:15,955 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:15,955 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:15,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:19:15,957 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:15,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1630335403, now seen corresponding path program 1 times [2024-11-28 03:19:15,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:15,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708174783] [2024-11-28 03:19:15,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:15,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708174783] [2024-11-28 03:19:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708174783] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:16,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364604357] [2024-11-28 03:19:16,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:16,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:16,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:16,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:16,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:19:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:16,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:19:16,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:16,601 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 7 [2024-11-28 03:19:16,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:17,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364604357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:17,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:17,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-28 03:19:17,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926986373] [2024-11-28 03:19:17,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:17,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:19:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:17,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:19:17,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:19:17,361 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:17,672 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-28 03:19:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:19:17,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-28 03:19:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:17,675 INFO L225 Difference]: With dead ends: 32 [2024-11-28 03:19:17,676 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 03:19:17,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:19:17,677 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:17,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 03:19:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-28 03:19:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 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) [2024-11-28 03:19:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-28 03:19:17,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2024-11-28 03:19:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:17,685 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-28 03:19:17,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-28 03:19:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:17,686 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:17,686 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:17,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:17,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:17,891 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:17,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1374145103, now seen corresponding path program 1 times [2024-11-28 03:19:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:17,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863367068] [2024-11-28 03:19:17,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:18,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:18,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863367068] [2024-11-28 03:19:18,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863367068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:18,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:18,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:19:18,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196932490] [2024-11-28 03:19:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:18,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:19:18,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:18,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:19:18,119 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:19:18,119 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:18,199 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-28 03:19:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:19:18,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:18,205 INFO L225 Difference]: With dead ends: 37 [2024-11-28 03:19:18,205 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 03:19:18,206 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:19:18,207 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:18,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 93 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 03:19:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-28 03:19:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-28 03:19:18,214 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2024-11-28 03:19:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:18,214 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-28 03:19:18,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-28 03:19:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:18,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:18,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:18,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:19:18,215 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:18,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash -673080525, now seen corresponding path program 1 times [2024-11-28 03:19:18,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:18,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255158789] [2024-11-28 03:19:18,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:18,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:18,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255158789] [2024-11-28 03:19:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255158789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:18,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:18,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:19:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141482420] [2024-11-28 03:19:18,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:18,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:19:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:18,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:19:18,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:19:18,459 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:18,549 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2024-11-28 03:19:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:19:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:18,550 INFO L225 Difference]: With dead ends: 51 [2024-11-28 03:19:18,551 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 03:19:18,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:19:18,556 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:18,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 03:19:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2024-11-28 03:19:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-28 03:19:18,559 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-11-28 03:19:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:18,559 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-28 03:19:18,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-28 03:19:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 03:19:18,560 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:18,560 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:18,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:19:18,560 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:18,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -414915087, now seen corresponding path program 1 times [2024-11-28 03:19:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249516452] [2024-11-28 03:19:18,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:18,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:18,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249516452] [2024-11-28 03:19:18,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249516452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:18,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:19:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772593494] [2024-11-28 03:19:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:18,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:19:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:18,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:19:18,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:19:18,809 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:18,895 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-28 03:19:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:19:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 03:19:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:18,896 INFO L225 Difference]: With dead ends: 45 [2024-11-28 03:19:18,896 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 03:19:18,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:19:18,897 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:18,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 03:19:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2024-11-28 03:19:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-28 03:19:18,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2024-11-28 03:19:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:18,905 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-28 03:19:18,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-28 03:19:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 03:19:18,905 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:18,905 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:18,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:19:18,906 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:18,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash 351238754, now seen corresponding path program 1 times [2024-11-28 03:19:18,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:18,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403463836] [2024-11-28 03:19:18,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:19,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403463836] [2024-11-28 03:19:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403463836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:19:19,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:19:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:19:19,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898597930] [2024-11-28 03:19:19,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:19:19,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:19:19,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:19,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:19:19,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:19:19,080 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2024-11-28 03:19:19,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:19,105 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-28 03:19:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:19:19,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2024-11-28 03:19:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:19,107 INFO L225 Difference]: With dead ends: 33 [2024-11-28 03:19:19,107 INFO L226 Difference]: Without dead ends: 21 [2024-11-28 03:19:19,107 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 [2024-11-28 03:19:19,107 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:19,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:19:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-28 03:19:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-28 03:19:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-28 03:19:19,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-11-28 03:19:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:19,110 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-28 03:19:19,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2024-11-28 03:19:19,111 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-28 03:19:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 03:19:19,111 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:19,111 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:19,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 03:19:19,112 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:19,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -784539414, now seen corresponding path program 1 times [2024-11-28 03:19:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548677903] [2024-11-28 03:19:19,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548677903] [2024-11-28 03:19:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548677903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458490634] [2024-11-28 03:19:19,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:19,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:19,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:19,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:19,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:19:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:19,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:19:19,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:19,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:19,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458490634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:19,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:19,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 03:19:19,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420399834] [2024-11-28 03:19:19,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:19,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:19:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:19,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:19:19,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:19:19,885 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:20,043 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-28 03:19:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 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 18 [2024-11-28 03:19:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:20,044 INFO L225 Difference]: With dead ends: 31 [2024-11-28 03:19:20,045 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 03:19:20,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:19:20,046 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:20,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:19:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 03:19:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-11-28 03:19:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-28 03:19:20,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2024-11-28 03:19:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:20,053 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-28 03:19:20,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-28 03:19:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 03:19:20,053 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:20,053 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:20,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:20,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:20,254 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:20,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:20,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1449081930, now seen corresponding path program 1 times [2024-11-28 03:19:20,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:20,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91925911] [2024-11-28 03:19:20,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:20,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:20,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:20,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91925911] [2024-11-28 03:19:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91925911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:20,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207773048] [2024-11-28 03:19:20,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:19:20,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:20,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:20,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:20,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:19:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:20,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:19:20,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:20,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:20,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:21,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:21,812 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:19:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:21,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207773048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:21,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:21,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 23 [2024-11-28 03:19:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164165144] [2024-11-28 03:19:21,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:21,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:19:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:21,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:19:21,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:19:21,888 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:22,146 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-28 03:19:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:19:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-28 03:19:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:22,148 INFO L225 Difference]: With dead ends: 34 [2024-11-28 03:19:22,148 INFO L226 Difference]: Without dead ends: 34 [2024-11-28 03:19:22,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:19:22,150 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:22,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 67 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:22,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-28 03:19:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2024-11-28 03:19:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-28 03:19:22,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2024-11-28 03:19:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:22,156 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-28 03:19:22,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-28 03:19:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:19:22,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:22,157 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:22,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:19:22,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:22,358 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:22,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash 883477699, now seen corresponding path program 2 times [2024-11-28 03:19:22,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:22,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078118726] [2024-11-28 03:19:22,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:22,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:22,393 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:22,393 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:22,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078118726] [2024-11-28 03:19:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078118726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500665979] [2024-11-28 03:19:22,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:22,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:22,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:22,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:19:23,068 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:23,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:23,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:19:23,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:23,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:19:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:23,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:23,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:19:23,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:19:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:23,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500665979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:23,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:23,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2024-11-28 03:19:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681625066] [2024-11-28 03:19:23,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:23,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:19:23,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:23,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:19:23,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:19:23,414 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:23,742 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-11-28 03:19:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:19:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 03:19:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:23,743 INFO L225 Difference]: With dead ends: 42 [2024-11-28 03:19:23,744 INFO L226 Difference]: Without dead ends: 32 [2024-11-28 03:19:23,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:19:23,745 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:23,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 102 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-28 03:19:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-28 03:19:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-11-28 03:19:23,750 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2024-11-28 03:19:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:23,750 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-11-28 03:19:23,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-11-28 03:19:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 03:19:23,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:23,751 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:23,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:23,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:23,952 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:23,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1117175484, now seen corresponding path program 3 times [2024-11-28 03:19:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132634078] [2024-11-28 03:19:23,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:23,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:19:23,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:24,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132634078] [2024-11-28 03:19:24,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132634078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:24,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049340155] [2024-11-28 03:19:24,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:24,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:24,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:24,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:24,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:19:24,449 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:19:24,449 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:24,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 03:19:24,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:24,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:19:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:24,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049340155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:25,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:25,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-28 03:19:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999295366] [2024-11-28 03:19:25,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:25,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:19:25,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:25,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:19:25,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:19:25,148 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:25,387 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-28 03:19:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:19:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-28 03:19:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:25,391 INFO L225 Difference]: With dead ends: 36 [2024-11-28 03:19:25,391 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 03:19:25,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:19:25,394 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:25,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 84 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 03:19:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-11-28 03:19:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 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) [2024-11-28 03:19:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-28 03:19:25,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2024-11-28 03:19:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:25,400 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-28 03:19:25,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-28 03:19:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 03:19:25,400 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:25,405 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:25,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:19:25,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:25,606 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:25,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash 272701624, now seen corresponding path program 2 times [2024-11-28 03:19:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:25,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083316445] [2024-11-28 03:19:25,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:25,629 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:25,630 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:26,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:26,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083316445] [2024-11-28 03:19:26,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083316445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:26,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88220879] [2024-11-28 03:19:26,170 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:26,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:26,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:26,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:19:26,272 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:26,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:26,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:19:26,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:26,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:26,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:27,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:27,600 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:19:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:27,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88220879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:27,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:27,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2024-11-28 03:19:27,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015786830] [2024-11-28 03:19:27,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:27,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:19:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:27,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:19:27,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:19:27,664 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:28,225 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2024-11-28 03:19:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:19:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2024-11-28 03:19:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:28,227 INFO L225 Difference]: With dead ends: 42 [2024-11-28 03:19:28,227 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 03:19:28,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:19:28,228 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:28,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 111 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:19:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 03:19:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-11-28 03:19:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-28 03:19:28,230 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2024-11-28 03:19:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:28,231 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-28 03:19:28,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-28 03:19:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 03:19:28,231 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:28,232 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:28,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:19:28,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:28,432 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:28,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2024050283, now seen corresponding path program 4 times [2024-11-28 03:19:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098296223] [2024-11-28 03:19:28,433 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:28,453 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:28,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:19:29,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:29,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098296223] [2024-11-28 03:19:29,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098296223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:29,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219163899] [2024-11-28 03:19:29,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:29,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:29,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:19:29,285 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:29,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:29,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 03:19:29,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:29,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-28 03:19:30,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:19:30,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 121 [2024-11-28 03:19:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:19:31,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:31,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-28 03:19:31,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-28 03:19:31,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:32,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219163899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:32,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:32,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 38 [2024-11-28 03:19:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713116179] [2024-11-28 03:19:32,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:32,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:19:32,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:32,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:19:32,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:19:32,194 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:33,234 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-28 03:19:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:19:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-28 03:19:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:33,235 INFO L225 Difference]: With dead ends: 34 [2024-11-28 03:19:33,235 INFO L226 Difference]: Without dead ends: 34 [2024-11-28 03:19:33,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 03:19:33,237 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:33,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:19:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-28 03:19:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-11-28 03:19:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2024-11-28 03:19:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-28 03:19:33,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2024-11-28 03:19:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:33,240 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-28 03:19:33,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-28 03:19:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 03:19:33,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:33,241 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:33,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:19:33,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:19:33,445 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:33,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:33,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1678950655, now seen corresponding path program 3 times [2024-11-28 03:19:33,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:33,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39314059] [2024-11-28 03:19:33,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:33,503 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:19:33,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:33,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:33,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39314059] [2024-11-28 03:19:33,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39314059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:33,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931320154] [2024-11-28 03:19:33,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:33,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:33,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:19:34,109 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:19:34,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:34,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:19:34,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:34,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:19:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:34,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:34,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:19:34,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:19:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931320154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:34,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:34,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2024-11-28 03:19:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838703665] [2024-11-28 03:19:34,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:34,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:19:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:34,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:19:34,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:19:34,514 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2024-11-28 03:19:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:35,129 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2024-11-28 03:19:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:19:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) Word has length 31 [2024-11-28 03:19:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:35,130 INFO L225 Difference]: With dead ends: 53 [2024-11-28 03:19:35,130 INFO L226 Difference]: Without dead ends: 39 [2024-11-28 03:19:35,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:19:35,132 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:35,132 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:19:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-28 03:19:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-11-28 03:19:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-28 03:19:35,135 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2024-11-28 03:19:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:35,135 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-28 03:19:35,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) [2024-11-28 03:19:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-28 03:19:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:19:35,136 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:35,136 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:35,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:19:35,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:19:35,341 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:35,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1873999654, now seen corresponding path program 4 times [2024-11-28 03:19:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:35,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095583441] [2024-11-28 03:19:35,342 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:35,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:35,377 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:35,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095583441] [2024-11-28 03:19:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095583441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831910306] [2024-11-28 03:19:36,047 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:36,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:36,050 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:36,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:19:36,191 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:36,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:36,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 03:19:36,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:36,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:36,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:36,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:37,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:38,257 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:19:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:38,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831910306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:38,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:38,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 14] total 35 [2024-11-28 03:19:38,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903931251] [2024-11-28 03:19:38,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:38,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:19:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:38,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:19:38,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:19:38,336 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:39,260 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-11-28 03:19:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:19:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2024-11-28 03:19:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:39,261 INFO L225 Difference]: With dead ends: 49 [2024-11-28 03:19:39,261 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 03:19:39,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:19:39,262 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:39,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:19:39,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 03:19:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2024-11-28 03:19:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-28 03:19:39,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2024-11-28 03:19:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:39,265 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-28 03:19:39,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-28 03:19:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 03:19:39,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:39,266 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:39,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:39,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:19:39,471 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:39,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash -512509843, now seen corresponding path program 5 times [2024-11-28 03:19:39,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:39,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465492690] [2024-11-28 03:19:39,472 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:19:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:39,500 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:19:39,500 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:40,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465492690] [2024-11-28 03:19:40,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465492690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:40,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252136930] [2024-11-28 03:19:40,006 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:19:40,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:40,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:40,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:40,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:19:40,150 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:19:40,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:40,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:19:40,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:40,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:19:40,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:19:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:40,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:40,584 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 15 treesize of output 13 [2024-11-28 03:19:40,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:19:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252136930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:40,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 29 [2024-11-28 03:19:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603996484] [2024-11-28 03:19:40,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:40,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:19:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:40,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:19:40,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:19:40,720 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:41,554 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2024-11-28 03:19:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:19:41,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2024-11-28 03:19:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:41,555 INFO L225 Difference]: With dead ends: 65 [2024-11-28 03:19:41,555 INFO L226 Difference]: Without dead ends: 47 [2024-11-28 03:19:41,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 03:19:41,556 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:41,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 215 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:19:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-28 03:19:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-11-28 03:19:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-11-28 03:19:41,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2024-11-28 03:19:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:41,562 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-11-28 03:19:41,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-11-28 03:19:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 03:19:41,563 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:41,563 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:41,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:19:41,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:19:41,764 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:41,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:41,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1391122324, now seen corresponding path program 6 times [2024-11-28 03:19:41,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:41,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63615137] [2024-11-28 03:19:41,767 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:19:41,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:41,830 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 03:19:41,830 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63615137] [2024-11-28 03:19:42,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63615137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:42,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893144891] [2024-11-28 03:19:42,376 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:19:42,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:42,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:19:42,691 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 03:19:42,691 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:42,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 03:19:42,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:42,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:19:42,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:42,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:19:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:44,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:19:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893144891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:45,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 40 [2024-11-28 03:19:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865826249] [2024-11-28 03:19:45,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:45,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 03:19:45,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:45,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 03:19:45,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:19:45,107 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:45,751 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-28 03:19:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:19:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-28 03:19:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:45,752 INFO L225 Difference]: With dead ends: 57 [2024-11-28 03:19:45,752 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 03:19:45,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:19:45,753 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:45,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 173 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:19:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 03:19:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-11-28 03:19:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-28 03:19:45,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2024-11-28 03:19:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:45,757 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-28 03:19:45,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-28 03:19:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:19:45,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:45,758 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:45,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:19:45,962 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:45,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1412845093, now seen corresponding path program 7 times [2024-11-28 03:19:45,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:45,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186020049] [2024-11-28 03:19:45,963 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:19:45,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:46,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:46,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186020049] [2024-11-28 03:19:46,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186020049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:46,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45372057] [2024-11-28 03:19:46,621 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:19:46,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:46,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:46,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:46,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:19:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:19:46,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:19:46,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:46,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:19:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:47,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:47,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:19:47,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:19:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:47,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45372057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:47,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:47,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-11-28 03:19:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050452402] [2024-11-28 03:19:47,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:47,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:19:47,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:47,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:19:47,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:19:47,326 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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) [2024-11-28 03:19:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:48,236 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-11-28 03:19:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 03:19:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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) Word has length 47 [2024-11-28 03:19:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:48,237 INFO L225 Difference]: With dead ends: 77 [2024-11-28 03:19:48,237 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 03:19:48,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 03:19:48,238 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:48,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 295 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:19:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 03:19:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-28 03:19:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-11-28 03:19:48,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2024-11-28 03:19:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:48,243 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-11-28 03:19:48,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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) [2024-11-28 03:19:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-11-28 03:19:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 03:19:48,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:48,244 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:48,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:19:48,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:19:48,445 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:48,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:48,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1776371198, now seen corresponding path program 8 times [2024-11-28 03:19:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042283742] [2024-11-28 03:19:48,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:48,498 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:48,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042283742] [2024-11-28 03:19:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042283742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879283244] [2024-11-28 03:19:49,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:19:49,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:49,332 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:19:49,478 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:19:49,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:49,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-28 03:19:49,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:49,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:49,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:19:49,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:19:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:50,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:19:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:51,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879283244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:51,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:51,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 46 [2024-11-28 03:19:51,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566615443] [2024-11-28 03:19:51,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:51,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 03:19:51,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:51,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 03:19:51,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:19:51,806 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:52,589 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-11-28 03:19:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:19:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 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 51 [2024-11-28 03:19:52,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:52,590 INFO L225 Difference]: With dead ends: 65 [2024-11-28 03:19:52,590 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 03:19:52,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:19:52,591 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:52,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 244 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:19:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 03:19:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2024-11-28 03:19:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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) [2024-11-28 03:19:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-11-28 03:19:52,594 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2024-11-28 03:19:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:52,594 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-11-28 03:19:52,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-11-28 03:19:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:19:52,595 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:52,595 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:52,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:19:52,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:52,799 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:52,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1807045303, now seen corresponding path program 9 times [2024-11-28 03:19:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:52,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868134808] [2024-11-28 03:19:52,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:52,844 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:19:52,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:53,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:53,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868134808] [2024-11-28 03:19:53,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868134808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:53,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786962445] [2024-11-28 03:19:53,694 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:19:53,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:53,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:53,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:19:53,958 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 03:19:53,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:53,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:19:53,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:54,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:19:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:54,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:54,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:19:54,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:19:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:54,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786962445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:54,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-11-28 03:19:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940924883] [2024-11-28 03:19:54,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:54,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:19:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:54,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:19:54,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:19:54,615 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:19:55,798 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2024-11-28 03:19:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:19:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2024-11-28 03:19:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:19:55,799 INFO L225 Difference]: With dead ends: 89 [2024-11-28 03:19:55,799 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 03:19:55,800 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 03:19:55,800 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:19:55,800 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 347 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:19:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 03:19:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-11-28 03:19:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-28 03:19:55,803 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2024-11-28 03:19:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:19:55,804 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-28 03:19:55,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-28 03:19:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 03:19:55,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:19:55,805 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:55,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:19:56,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:56,005 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:19:56,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 327458416, now seen corresponding path program 10 times [2024-11-28 03:19:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016473148] [2024-11-28 03:19:56,006 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:56,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:56,061 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:56,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:56,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016473148] [2024-11-28 03:19:56,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016473148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:56,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78662836] [2024-11-28 03:19:56,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:56,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:56,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:56,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:56,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:19:57,352 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:57,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:57,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-28 03:19:57,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:57,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:19:57,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:19:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:19:59,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:20:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78662836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:00,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 54 [2024-11-28 03:20:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186141234] [2024-11-28 03:20:00,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:00,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 03:20:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:00,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 03:20:00,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2696, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 03:20:00,314 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:01,584 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2024-11-28 03:20:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:20:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-28 03:20:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:01,585 INFO L225 Difference]: With dead ends: 73 [2024-11-28 03:20:01,585 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 03:20:01,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 03:20:01,587 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:01,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 482 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:20:01,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 03:20:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2024-11-28 03:20:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-11-28 03:20:01,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2024-11-28 03:20:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:01,591 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-11-28 03:20:01,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.240740740740741) internal successors, (175), 55 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-11-28 03:20:01,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 03:20:01,592 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:01,592 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:01,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:20:01,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:01,793 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:01,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1781312183, now seen corresponding path program 11 times [2024-11-28 03:20:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399164526] [2024-11-28 03:20:01,793 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:01,847 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:20:01,851 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 91 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:02,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399164526] [2024-11-28 03:20:02,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399164526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:02,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377929572] [2024-11-28 03:20:02,650 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:02,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:02,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:20:02,870 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 03:20:02,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:02,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-28 03:20:02,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:03,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:20:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:03,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:03,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:20:03,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:20:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377929572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:03,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:03,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 41 [2024-11-28 03:20:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69468856] [2024-11-28 03:20:03,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:03,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 03:20:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:03,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 03:20:03,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:20:03,641 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:04,961 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2024-11-28 03:20:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:20:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 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 63 [2024-11-28 03:20:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:04,962 INFO L225 Difference]: With dead ends: 101 [2024-11-28 03:20:04,962 INFO L226 Difference]: Without dead ends: 71 [2024-11-28 03:20:04,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=319, Invalid=3841, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 03:20:04,964 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:04,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 457 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:20:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-28 03:20:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-11-28 03:20:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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) [2024-11-28 03:20:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-28 03:20:04,968 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2024-11-28 03:20:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:04,968 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-28 03:20:04,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-28 03:20:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 03:20:04,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:04,970 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:04,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:20:05,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 03:20:05,171 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:05,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1554873122, now seen corresponding path program 12 times [2024-11-28 03:20:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910383672] [2024-11-28 03:20:05,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:05,214 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 03:20:05,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:05,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910383672] [2024-11-28 03:20:05,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910383672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261479850] [2024-11-28 03:20:05,981 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:05,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:05,985 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:05,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:20:06,720 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 03:20:06,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:06,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-28 03:20:06,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:06,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:20:06,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:20:06,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:20:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:08,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:09,505 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:20:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261479850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:09,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:09,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 58 [2024-11-28 03:20:09,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427847532] [2024-11-28 03:20:09,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:09,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-28 03:20:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:09,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-28 03:20:09,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2982, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 03:20:09,560 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 59 states, 58 states have (on average 3.4310344827586206) internal successors, (199), 59 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:10,485 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-28 03:20:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:20:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.4310344827586206) internal successors, (199), 59 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-28 03:20:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:10,486 INFO L225 Difference]: With dead ends: 81 [2024-11-28 03:20:10,486 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 03:20:10,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=545, Invalid=3877, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 03:20:10,488 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:10,488 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 338 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:20:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 03:20:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2024-11-28 03:20:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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) [2024-11-28 03:20:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-11-28 03:20:10,491 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2024-11-28 03:20:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:10,491 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-11-28 03:20:10,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.4310344827586206) internal successors, (199), 59 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-11-28 03:20:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:20:10,492 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:10,492 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:10,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:20:10,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 03:20:10,696 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:10,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash -89806299, now seen corresponding path program 13 times [2024-11-28 03:20:10,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:10,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974409759] [2024-11-28 03:20:10,697 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 99 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:11,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:11,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974409759] [2024-11-28 03:20:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974409759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:11,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167299734] [2024-11-28 03:20:11,658 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:11,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:11,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:11,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:11,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:20:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:11,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 03:20:11,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:12,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:20:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:12,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:12,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:20:12,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:20:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167299734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:12,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:12,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2024-11-28 03:20:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748868212] [2024-11-28 03:20:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:12,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 03:20:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:12,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 03:20:12,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 03:20:12,794 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:14,426 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2024-11-28 03:20:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:20:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-28 03:20:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:14,427 INFO L225 Difference]: With dead ends: 113 [2024-11-28 03:20:14,427 INFO L226 Difference]: Without dead ends: 79 [2024-11-28 03:20:14,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=337, Invalid=4355, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 03:20:14,428 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:14,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 557 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:20:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-28 03:20:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-11-28 03:20:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 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) [2024-11-28 03:20:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-11-28 03:20:14,431 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2024-11-28 03:20:14,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:14,431 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-11-28 03:20:14,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:14,431 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-11-28 03:20:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 03:20:14,432 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:14,432 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:14,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:20:14,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:20:14,632 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:14,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 465464652, now seen corresponding path program 14 times [2024-11-28 03:20:14,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:14,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297956042] [2024-11-28 03:20:14,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:14,667 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:14,667 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297956042] [2024-11-28 03:20:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297956042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143145204] [2024-11-28 03:20:15,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:15,752 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:15,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:20:15,921 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:15,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:15,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-28 03:20:15,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:15,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:20:15,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:20:15,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:20:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:17,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:19,558 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:20:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 120 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143145204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:19,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:19,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 60 [2024-11-28 03:20:19,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042890154] [2024-11-28 03:20:19,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:19,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-28 03:20:19,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:19,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-28 03:20:19,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3229, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 03:20:19,645 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 61 states, 60 states have (on average 3.716666666666667) internal successors, (223), 61 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:20,532 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-11-28 03:20:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:20:20,533 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.716666666666667) internal successors, (223), 61 states have internal predecessors, (223), 0 states have call successors, (0), 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 75 [2024-11-28 03:20:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:20,534 INFO L225 Difference]: With dead ends: 82 [2024-11-28 03:20:20,534 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 03:20:20,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=464, Invalid=3442, Unknown=0, NotChecked=0, Total=3906 [2024-11-28 03:20:20,535 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:20,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 424 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:20:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 03:20:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-28 03:20:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-11-28 03:20:20,538 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2024-11-28 03:20:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:20,538 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-11-28 03:20:20,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.716666666666667) internal successors, (223), 61 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-11-28 03:20:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 03:20:20,539 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:20,539 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:20,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:20:20,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:20:20,740 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:20,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 283880339, now seen corresponding path program 15 times [2024-11-28 03:20:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149368760] [2024-11-28 03:20:20,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:20,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:20:20,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149368760] [2024-11-28 03:20:22,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149368760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:22,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035431186] [2024-11-28 03:20:22,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:20:22,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:22,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:22,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:20:22,913 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:20:22,913 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:22,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-28 03:20:22,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:23,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:20:24,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:20:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:24,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:24,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:20:24,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:20:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:25,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035431186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:25,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:25,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2024-11-28 03:20:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956129224] [2024-11-28 03:20:25,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:25,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-28 03:20:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:25,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-28 03:20:25,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4222, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 03:20:25,598 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 67 states, 67 states have (on average 3.328358208955224) internal successors, (223), 67 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:28,794 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2024-11-28 03:20:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:20:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.328358208955224) internal successors, (223), 67 states have internal predecessors, (223), 0 states have call successors, (0), 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 79 [2024-11-28 03:20:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:28,795 INFO L225 Difference]: With dead ends: 125 [2024-11-28 03:20:28,795 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 03:20:28,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=482, Invalid=8638, Unknown=0, NotChecked=0, Total=9120 [2024-11-28 03:20:28,796 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:28,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 886 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:20:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 03:20:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-11-28 03:20:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2024-11-28 03:20:28,799 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2024-11-28 03:20:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:28,799 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2024-11-28 03:20:28,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.328358208955224) internal successors, (223), 67 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2024-11-28 03:20:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 03:20:28,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:28,800 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:28,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:20:29,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 03:20:29,000 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:29,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:29,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1358845882, now seen corresponding path program 16 times [2024-11-28 03:20:29,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:29,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622122708] [2024-11-28 03:20:29,001 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:29,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:29,112 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:29,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:30,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622122708] [2024-11-28 03:20:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622122708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:30,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826644197] [2024-11-28 03:20:30,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:20:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:30,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:30,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:20:30,622 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:20:30,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:30,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-28 03:20:30,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:30,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:20:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:20:30,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:20:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:32,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:20:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:34,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826644197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:34,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:34,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 25] total 70 [2024-11-28 03:20:34,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308699785] [2024-11-28 03:20:34,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:34,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 03:20:34,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:34,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 03:20:34,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=4507, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 03:20:34,775 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:36,643 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2024-11-28 03:20:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:20:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 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 [2024-11-28 03:20:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:36,644 INFO L225 Difference]: With dead ends: 97 [2024-11-28 03:20:36,644 INFO L226 Difference]: Without dead ends: 97 [2024-11-28 03:20:36,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=621, Invalid=5859, Unknown=0, NotChecked=0, Total=6480 [2024-11-28 03:20:36,645 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:36,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 786 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:20:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-28 03:20:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-11-28 03:20:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-11-28 03:20:36,648 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2024-11-28 03:20:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:36,648 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-11-28 03:20:36,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.5285714285714285) internal successors, (247), 71 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-11-28 03:20:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 03:20:36,649 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:36,650 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:36,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:20:36,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:36,850 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:36,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1983164161, now seen corresponding path program 17 times [2024-11-28 03:20:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:36,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300504010] [2024-11-28 03:20:36,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:36,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:36,898 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:20:36,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 190 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300504010] [2024-11-28 03:20:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300504010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070407685] [2024-11-28 03:20:38,178 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:20:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:38,180 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:38,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:20:38,783 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-28 03:20:38,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:38,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 03:20:38,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:39,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:20:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:39,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:39,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:20:39,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:20:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:40,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070407685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:40,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:40,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 53 [2024-11-28 03:20:40,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158294737] [2024-11-28 03:20:40,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:40,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 03:20:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:40,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 03:20:40,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2587, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 03:20:40,094 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:42,507 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2024-11-28 03:20:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 03:20:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 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 [2024-11-28 03:20:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:42,508 INFO L225 Difference]: With dead ends: 137 [2024-11-28 03:20:42,509 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 03:20:42,509 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=493, Invalid=6817, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 03:20:42,510 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:42,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 869 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:20:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 03:20:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-11-28 03:20:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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) [2024-11-28 03:20:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2024-11-28 03:20:42,513 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2024-11-28 03:20:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:42,514 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2024-11-28 03:20:42,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2024-11-28 03:20:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-28 03:20:42,516 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:42,516 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:42,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:20:42,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:42,717 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:42,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 357057576, now seen corresponding path program 18 times [2024-11-28 03:20:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080819675] [2024-11-28 03:20:42,717 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:42,778 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 03:20:42,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:43,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080819675] [2024-11-28 03:20:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080819675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532092011] [2024-11-28 03:20:43,738 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:20:43,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:43,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:43,740 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:43,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:20:44,777 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-28 03:20:44,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:44,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-28 03:20:44,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:44,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:20:44,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:20:44,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:20:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:46,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:48,264 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:20:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:48,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532092011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:48,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:48,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 76 [2024-11-28 03:20:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830900717] [2024-11-28 03:20:48,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:48,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-28 03:20:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:48,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-28 03:20:48,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=5118, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 03:20:48,331 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:49,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:49,778 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2024-11-28 03:20:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:20:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 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 91 [2024-11-28 03:20:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:49,779 INFO L225 Difference]: With dead ends: 105 [2024-11-28 03:20:49,779 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 03:20:49,780 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=908, Invalid=6748, Unknown=0, NotChecked=0, Total=7656 [2024-11-28 03:20:49,780 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:49,780 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 501 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:20:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 03:20:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2024-11-28 03:20:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2024-11-28 03:20:49,783 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2024-11-28 03:20:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:49,783 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2024-11-28 03:20:49,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2024-11-28 03:20:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-28 03:20:49,784 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:49,784 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:49,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 03:20:49,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:20:49,985 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:49,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -239684497, now seen corresponding path program 19 times [2024-11-28 03:20:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:49,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777258254] [2024-11-28 03:20:49,985 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 201 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:51,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777258254] [2024-11-28 03:20:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777258254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:51,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829068448] [2024-11-28 03:20:51,317 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:20:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:51,319 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:51,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:20:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:20:51,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-28 03:20:51,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:52,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:20:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:52,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:20:52,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:20:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:20:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829068448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:20:52,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:20:52,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-11-28 03:20:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809097686] [2024-11-28 03:20:52,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:20:52,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-28 03:20:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:20:52,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-28 03:20:52,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2904, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 03:20:52,898 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:20:55,769 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2024-11-28 03:20:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-28 03:20:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 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 [2024-11-28 03:20:55,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:20:55,771 INFO L225 Difference]: With dead ends: 149 [2024-11-28 03:20:55,771 INFO L226 Difference]: Without dead ends: 103 [2024-11-28 03:20:55,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=514, Invalid=7496, Unknown=0, NotChecked=0, Total=8010 [2024-11-28 03:20:55,771 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:20:55,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 917 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:20:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-28 03:20:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2024-11-28 03:20:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2024-11-28 03:20:55,775 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2024-11-28 03:20:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:20:55,775 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2024-11-28 03:20:55,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:20:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2024-11-28 03:20:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 03:20:55,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:20:55,776 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:20:55,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:20:55,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:55,977 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:20:55,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:20:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash 953299606, now seen corresponding path program 20 times [2024-11-28 03:20:55,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:20:55,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379293898] [2024-11-28 03:20:55,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:55,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:20:56,005 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:56,005 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:20:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:20:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379293898] [2024-11-28 03:20:57,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379293898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:20:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062781631] [2024-11-28 03:20:57,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:20:57,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:20:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:20:57,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:20:57,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:20:57,746 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:20:57,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:20:57,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-28 03:20:57,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:20:57,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:20:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:20:57,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:21:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:00,436 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:21:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062781631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:02,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:02,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 81 [2024-11-28 03:21:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884697173] [2024-11-28 03:21:02,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:02,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-28 03:21:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:02,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-28 03:21:02,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=6142, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 03:21:02,750 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:21:05,160 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-11-28 03:21:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 03:21:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 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 [2024-11-28 03:21:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:21:05,161 INFO L225 Difference]: With dead ends: 113 [2024-11-28 03:21:05,161 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 03:21:05,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=701, Invalid=8041, Unknown=0, NotChecked=0, Total=8742 [2024-11-28 03:21:05,162 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:21:05,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1081 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 03:21:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 03:21:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-11-28 03:21:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2024-11-28 03:21:05,166 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2024-11-28 03:21:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:21:05,166 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2024-11-28 03:21:05,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2024-11-28 03:21:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 03:21:05,168 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:21:05,168 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:05,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:21:05,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:05,369 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:21:05,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1218952157, now seen corresponding path program 21 times [2024-11-28 03:21:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:05,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954160009] [2024-11-28 03:21:05,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:21:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:05,452 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:21:05,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 276 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954160009] [2024-11-28 03:21:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954160009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:06,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626754542] [2024-11-28 03:21:06,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:21:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:06,972 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:06,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:21:10,741 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 03:21:10,741 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:10,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-28 03:21:10,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:11,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:21:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:12,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:13,463 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 15 treesize of output 13 [2024-11-28 03:21:13,465 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 16 treesize of output 12 [2024-11-28 03:21:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:14,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626754542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:14,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2024-11-28 03:21:14,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088124490] [2024-11-28 03:21:14,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:14,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 03:21:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:14,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 03:21:14,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=7024, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 03:21:14,409 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 86 states, 86 states have (on average 3.4302325581395348) internal successors, (295), 86 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:21:19,194 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2024-11-28 03:21:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 03:21:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.4302325581395348) internal successors, (295), 86 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-28 03:21:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:21:19,195 INFO L225 Difference]: With dead ends: 161 [2024-11-28 03:21:19,195 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 03:21:19,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2411 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=737, Invalid=14515, Unknown=0, NotChecked=0, Total=15252 [2024-11-28 03:21:19,196 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 3954 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:21:19,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1432 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3954 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 03:21:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 03:21:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-11-28 03:21:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2024-11-28 03:21:19,200 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2024-11-28 03:21:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:21:19,200 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2024-11-28 03:21:19,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.4302325581395348) internal successors, (295), 86 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2024-11-28 03:21:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 03:21:19,201 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:21:19,201 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:19,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:21:19,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:19,402 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:21:19,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:19,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1982717180, now seen corresponding path program 22 times [2024-11-28 03:21:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:19,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972355660] [2024-11-28 03:21:19,402 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:21:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:19,451 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:21:19,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:21,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972355660] [2024-11-28 03:21:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972355660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664397817] [2024-11-28 03:21:21,177 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:21:21,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:21,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:21,179 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:21,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:21:22,308 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:21:22,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:22,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-11-28 03:21:22,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:22,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:21:22,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:21:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:25,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:21:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:28,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664397817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:28,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:28,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 29] total 85 [2024-11-28 03:21:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144963181] [2024-11-28 03:21:28,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:28,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 03:21:28,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:28,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 03:21:28,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=776, Invalid=6534, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 03:21:28,073 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 86 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 86 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:21:30,259 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2024-11-28 03:21:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 03:21:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 86 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2024-11-28 03:21:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:21:30,261 INFO L225 Difference]: With dead ends: 114 [2024-11-28 03:21:30,261 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 03:21:30,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1222, Invalid=9080, Unknown=0, NotChecked=0, Total=10302 [2024-11-28 03:21:30,262 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:21:30,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 687 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:21:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 03:21:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-28 03:21:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 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) [2024-11-28 03:21:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-11-28 03:21:30,271 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2024-11-28 03:21:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:21:30,272 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-11-28 03:21:30,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 86 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-11-28 03:21:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 03:21:30,273 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:21:30,273 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:30,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:21:30,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:30,473 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:21:30,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1044235595, now seen corresponding path program 23 times [2024-11-28 03:21:30,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:30,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086154143] [2024-11-28 03:21:30,474 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:30,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:30,556 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 03:21:30,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 338 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:32,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:32,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086154143] [2024-11-28 03:21:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086154143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:32,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752890508] [2024-11-28 03:21:32,130 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:21:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:32,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:32,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:21:36,748 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-28 03:21:36,748 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:36,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-28 03:21:36,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:37,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:21:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:38,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:38,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:21:38,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:21:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:38,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752890508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:38,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:38,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 65 [2024-11-28 03:21:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394299973] [2024-11-28 03:21:38,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:38,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-28 03:21:38,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:38,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-28 03:21:38,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3931, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 03:21:38,516 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 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) [2024-11-28 03:21:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:21:42,428 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2024-11-28 03:21:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:21:42,429 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 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 111 [2024-11-28 03:21:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:21:42,430 INFO L225 Difference]: With dead ends: 173 [2024-11-28 03:21:42,430 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 03:21:42,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=686, Invalid=10444, Unknown=0, NotChecked=0, Total=11130 [2024-11-28 03:21:42,431 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 3590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:21:42,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1244 Invalid, 3590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3555 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 03:21:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 03:21:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-11-28 03:21:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 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) [2024-11-28 03:21:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2024-11-28 03:21:42,434 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 111 [2024-11-28 03:21:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:21:42,435 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2024-11-28 03:21:42,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 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) [2024-11-28 03:21:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2024-11-28 03:21:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 03:21:42,436 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:21:42,436 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:42,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 03:21:42,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:42,637 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:21:42,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:42,637 INFO L85 PathProgramCache]: Analyzing trace with hash -729934478, now seen corresponding path program 24 times [2024-11-28 03:21:42,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:42,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705508180] [2024-11-28 03:21:42,637 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:21:42,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:42,731 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:21:42,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:43,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705508180] [2024-11-28 03:21:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705508180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842461925] [2024-11-28 03:21:43,877 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:21:43,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:43,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:43,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:43,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:21:49,909 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 03:21:49,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:49,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-11-28 03:21:49,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:49,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:21:49,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:21:49,975 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 [2024-11-28 03:21:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 276 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:51,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:53,737 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:21:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 325 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842461925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:53,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2024-11-28 03:21:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677937341] [2024-11-28 03:21:53,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:53,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 03:21:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:53,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 03:21:53,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=7219, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 03:21:53,803 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 92 states, 91 states have (on average 3.769230769230769) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:21:55,151 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2024-11-28 03:21:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:21:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.769230769230769) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-11-28 03:21:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:21:55,153 INFO L225 Difference]: With dead ends: 122 [2024-11-28 03:21:55,153 INFO L226 Difference]: Without dead ends: 122 [2024-11-28 03:21:55,153 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5277 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2021, Invalid=12259, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 03:21:55,153 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:21:55,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 224 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:21:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-28 03:21:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-11-28 03:21:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-11-28 03:21:55,156 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 115 [2024-11-28 03:21:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:21:55,156 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-11-28 03:21:55,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.769230769230769) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-11-28 03:21:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-28 03:21:55,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:21:55,158 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:21:55,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:21:55,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 03:21:55,358 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:21:55,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1817259847, now seen corresponding path program 25 times [2024-11-28 03:21:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:55,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540168353] [2024-11-28 03:21:55,359 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:21:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:21:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 339 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:57,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540168353] [2024-11-28 03:21:57,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540168353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316099757] [2024-11-28 03:21:57,122 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:21:57,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:57,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:57,124 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:57,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:21:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:21:57,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 03:21:57,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:58,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:21:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:58,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:59,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:21:59,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:21:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:59,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316099757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:59,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:59,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2024-11-28 03:21:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744939378] [2024-11-28 03:21:59,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:59,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-28 03:21:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:59,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-28 03:21:59,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4320, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 03:21:59,276 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 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) [2024-11-28 03:22:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:22:03,739 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2024-11-28 03:22:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 03:22:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 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) Word has length 119 [2024-11-28 03:22:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:22:03,740 INFO L225 Difference]: With dead ends: 185 [2024-11-28 03:22:03,740 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 03:22:03,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=727, Invalid=11483, Unknown=0, NotChecked=0, Total=12210 [2024-11-28 03:22:03,741 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 4059 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 4097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:22:03,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1415 Invalid, 4097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4059 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:22:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 03:22:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2024-11-28 03:22:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2024-11-28 03:22:03,746 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2024-11-28 03:22:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:22:03,746 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2024-11-28 03:22:03,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 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) [2024-11-28 03:22:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2024-11-28 03:22:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 03:22:03,747 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:22:03,747 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:22:03,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:22:03,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 03:22:03,948 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:22:03,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash -485750304, now seen corresponding path program 26 times [2024-11-28 03:22:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:03,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994374649] [2024-11-28 03:22:03,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:22:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:03,978 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:22:03,978 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 276 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:05,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994374649] [2024-11-28 03:22:05,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994374649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850545152] [2024-11-28 03:22:05,636 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:22:05,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:05,638 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:05,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:22:05,917 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:22:05,917 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:05,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-28 03:22:05,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:05,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:22:05,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:22:05,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:22:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:09,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:12,929 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:22:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:13,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850545152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:13,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:13,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 100 [2024-11-28 03:22:13,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896912298] [2024-11-28 03:22:13,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:13,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-28 03:22:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:13,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-28 03:22:13,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=9229, Unknown=0, NotChecked=0, Total=10100 [2024-11-28 03:22:13,031 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:22:16,296 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2024-11-28 03:22:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 03:22:16,297 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 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 123 [2024-11-28 03:22:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:22:16,298 INFO L225 Difference]: With dead ends: 137 [2024-11-28 03:22:16,298 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 03:22:16,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1167, Invalid=12173, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 03:22:16,299 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 66 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3984 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:22:16,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1324 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3984 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 03:22:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 03:22:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2024-11-28 03:22:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2024-11-28 03:22:16,307 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2024-11-28 03:22:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:22:16,307 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2024-11-28 03:22:16,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2024-11-28 03:22:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 03:22:16,308 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:22:16,308 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:22:16,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:22:16,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 03:22:16,509 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:22:16,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash 137420327, now seen corresponding path program 27 times [2024-11-28 03:22:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:16,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307498324] [2024-11-28 03:22:16,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:22:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:16,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 03:22:16,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 435 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:18,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307498324] [2024-11-28 03:22:18,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307498324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920952950] [2024-11-28 03:22:18,319 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:22:18,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:18,321 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:18,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:22:22,642 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 03:22:22,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:22,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-11-28 03:22:22,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:23,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:22:25,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:22:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:25,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:26,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:22:26,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:22:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:27,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920952950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:27,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:27,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 104 [2024-11-28 03:22:27,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882936093] [2024-11-28 03:22:27,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:27,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-28 03:22:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:27,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-28 03:22:27,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=10341, Unknown=0, NotChecked=0, Total=10712 [2024-11-28 03:22:27,774 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 104 states, 104 states have (on average 3.5288461538461537) internal successors, (367), 104 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:22:34,895 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2024-11-28 03:22:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 03:22:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.5288461538461537) internal successors, (367), 104 states have internal predecessors, (367), 0 states have call successors, (0), 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 127 [2024-11-28 03:22:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:22:34,896 INFO L225 Difference]: With dead ends: 197 [2024-11-28 03:22:34,896 INFO L226 Difference]: Without dead ends: 135 [2024-11-28 03:22:34,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3635 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1001, Invalid=21649, Unknown=0, NotChecked=0, Total=22650 [2024-11-28 03:22:34,897 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 6173 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 6228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 6173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:22:34,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 2173 Invalid, 6228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 6173 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 03:22:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-28 03:22:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-11-28 03:22:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2024-11-28 03:22:34,900 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 127 [2024-11-28 03:22:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:22:34,900 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2024-11-28 03:22:34,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.5288461538461537) internal successors, (367), 104 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2024-11-28 03:22:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 03:22:34,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:22:34,901 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:22:34,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:22:35,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:22:35,101 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:22:35,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2108817486, now seen corresponding path program 28 times [2024-11-28 03:22:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510641622] [2024-11-28 03:22:35,102 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:22:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:35,173 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:22:35,174 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 378 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510641622] [2024-11-28 03:22:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510641622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255350775] [2024-11-28 03:22:37,089 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:22:37,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:37,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:37,090 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:37,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:22:38,886 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:22:38,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:38,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-11-28 03:22:38,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:38,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:22:38,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:22:38,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:22:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:43,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:22:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255350775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:47,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:47,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 37] total 107 [2024-11-28 03:22:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899528162] [2024-11-28 03:22:47,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:47,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-28 03:22:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:47,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-28 03:22:47,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=10726, Unknown=0, NotChecked=0, Total=11556 [2024-11-28 03:22:47,899 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:22:54,075 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2024-11-28 03:22:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 03:22:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2024-11-28 03:22:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:22:54,076 INFO L225 Difference]: With dead ends: 146 [2024-11-28 03:22:54,077 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 03:22:54,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1619, Invalid=18687, Unknown=0, NotChecked=0, Total=20306 [2024-11-28 03:22:54,078 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 5449 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 5466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:22:54,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1834 Invalid, 5466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5449 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 03:22:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 03:22:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2024-11-28 03:22:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 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) [2024-11-28 03:22:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-11-28 03:22:54,081 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2024-11-28 03:22:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:22:54,082 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-11-28 03:22:54,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-11-28 03:22:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-28 03:22:54,083 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:22:54,083 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:22:54,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:22:54,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:22:54,283 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:22:54,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:54,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1492774293, now seen corresponding path program 29 times [2024-11-28 03:22:54,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:54,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791567232] [2024-11-28 03:22:54,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:22:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:54,363 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 03:22:54,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 496 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:56,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791567232] [2024-11-28 03:22:56,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791567232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:56,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578770324] [2024-11-28 03:22:56,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:22:56,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:56,285 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:23:04,125 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 03:23:04,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:04,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-28 03:23:04,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:23:04,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:23:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:06,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:23:06,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:23:06,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:23:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578770324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:23:06,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:23:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 77 [2024-11-28 03:23:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233932845] [2024-11-28 03:23:06,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:23:06,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-28 03:23:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:23:06,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-28 03:23:06,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=5554, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 03:23:06,525 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:23:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:23:12,049 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2024-11-28 03:23:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-28 03:23:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 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 135 [2024-11-28 03:23:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:23:12,051 INFO L225 Difference]: With dead ends: 209 [2024-11-28 03:23:12,051 INFO L226 Difference]: Without dead ends: 143 [2024-11-28 03:23:12,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=949, Invalid=15307, Unknown=0, NotChecked=0, Total=16256 [2024-11-28 03:23:12,052 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 5245 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 5303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 5245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:23:12,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1820 Invalid, 5303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 5245 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 03:23:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-28 03:23:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2024-11-28 03:23:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:23:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2024-11-28 03:23:12,055 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 135 [2024-11-28 03:23:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:23:12,055 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2024-11-28 03:23:12,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:23:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2024-11-28 03:23:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 03:23:12,056 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:23:12,057 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:23:12,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:23:12,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:23:12,257 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:23:12,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:23:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1789262012, now seen corresponding path program 30 times [2024-11-28 03:23:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:23:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695433095] [2024-11-28 03:23:12,258 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:23:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:23:12,336 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 03:23:12,336 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 378 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:23:13,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:23:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695433095] [2024-11-28 03:23:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695433095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:23:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181022758] [2024-11-28 03:23:13,819 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:23:13,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:23:13,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:23:13,821 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:23:13,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:23:57,063 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-28 03:23:57,064 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:23:57,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 198 conjuncts are in the unsatisfiable core [2024-11-28 03:23:57,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:23:57,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:23:57,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:24:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:02,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:24:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:08,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181022758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:24:08,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:24:08,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 40] total 115 [2024-11-28 03:24:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550348065] [2024-11-28 03:24:08,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:24:08,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-28 03:24:08,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:24:08,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-28 03:24:08,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12184, Unknown=0, NotChecked=0, Total=13340 [2024-11-28 03:24:08,419 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:24:15,655 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2024-11-28 03:24:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:24:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-11-28 03:24:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:24:15,656 INFO L225 Difference]: With dead ends: 153 [2024-11-28 03:24:15,657 INFO L226 Difference]: Without dead ends: 153 [2024-11-28 03:24:15,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4840 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2205, Invalid=21357, Unknown=0, NotChecked=0, Total=23562 [2024-11-28 03:24:15,658 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 133 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 4818 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 4853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:24:15,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1596 Invalid, 4853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4818 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 03:24:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-28 03:24:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2024-11-28 03:24:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-11-28 03:24:15,662 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 139 [2024-11-28 03:24:15,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:24:15,663 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-11-28 03:24:15,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-11-28 03:24:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-28 03:24:15,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:24:15,668 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:24:15,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:24:15,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:15,869 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:24:15,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:24:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1094713091, now seen corresponding path program 31 times [2024-11-28 03:24:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:24:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46873441] [2024-11-28 03:24:15,870 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:24:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:24:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:24:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 513 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:18,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:24:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46873441] [2024-11-28 03:24:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46873441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:24:18,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660699336] [2024-11-28 03:24:18,008 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:24:18,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:24:18,010 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:24:18,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:24:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:24:18,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-28 03:24:18,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:24:19,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:24:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:20,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:24:20,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:24:20,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:24:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660699336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:24:20,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:24:20,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2024-11-28 03:24:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471166887] [2024-11-28 03:24:20,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:24:20,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-28 03:24:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:24:20,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-28 03:24:20,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=6015, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 03:24:20,998 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:24:27,519 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2024-11-28 03:24:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 03:24:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-11-28 03:24:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:24:27,520 INFO L225 Difference]: With dead ends: 221 [2024-11-28 03:24:27,520 INFO L226 Difference]: Without dead ends: 151 [2024-11-28 03:24:27,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=976, Invalid=16316, Unknown=0, NotChecked=0, Total=17292 [2024-11-28 03:24:27,521 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 43 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 6001 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2080 SdHoareTripleChecker+Invalid, 6047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:24:27,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2080 Invalid, 6047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6001 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 03:24:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-28 03:24:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-11-28 03:24:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2024-11-28 03:24:27,525 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2024-11-28 03:24:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:24:27,525 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2024-11-28 03:24:27,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2024-11-28 03:24:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 03:24:27,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:24:27,526 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:24:27,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 03:24:27,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 03:24:27,727 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:24:27,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:24:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1847456554, now seen corresponding path program 32 times [2024-11-28 03:24:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:24:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304227585] [2024-11-28 03:24:27,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:24:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:24:27,763 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:24:27,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:24:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 435 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:24:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304227585] [2024-11-28 03:24:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304227585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:24:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99889328] [2024-11-28 03:24:29,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:24:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:24:29,815 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:24:29,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:24:30,186 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:24:30,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:24:30,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-28 03:24:30,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:24:30,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:24:30,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:24:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:35,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:24:39,712 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:24:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99889328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:24:39,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:24:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 41] total 118 [2024-11-28 03:24:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231431013] [2024-11-28 03:24:39,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:24:39,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-11-28 03:24:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:24:39,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-11-28 03:24:39,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=12751, Unknown=0, NotChecked=0, Total=14042 [2024-11-28 03:24:39,837 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:24:44,380 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2024-11-28 03:24:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 03:24:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 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 147 [2024-11-28 03:24:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:24:44,381 INFO L225 Difference]: With dead ends: 161 [2024-11-28 03:24:44,381 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 03:24:44,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5673 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1696, Invalid=16936, Unknown=0, NotChecked=0, Total=18632 [2024-11-28 03:24:44,382 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 5500 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 5517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:24:44,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1848 Invalid, 5517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5500 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 03:24:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 03:24:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2024-11-28 03:24:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2024-11-28 03:24:44,385 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2024-11-28 03:24:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:24:44,385 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2024-11-28 03:24:44,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:24:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2024-11-28 03:24:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-28 03:24:44,386 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:24:44,386 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:24:44,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:24:44,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 03:24:44,587 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:24:44,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:24:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2050560625, now seen corresponding path program 33 times [2024-11-28 03:24:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:24:44,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769335568] [2024-11-28 03:24:44,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:24:44,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:24:44,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 03:24:44,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:24:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 579 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:24:47,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:24:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769335568] [2024-11-28 03:24:47,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769335568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:24:47,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789566992] [2024-11-28 03:24:47,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:24:47,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:24:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:24:47,079 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:24:47,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:25:07,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-28 03:25:07,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:07,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-28 03:25:07,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:25:08,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:25:10,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:25:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:10,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:25:11,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:25:11,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:25:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789566992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:25:13,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:25:13,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 121 [2024-11-28 03:25:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598023365] [2024-11-28 03:25:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:25:13,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-28 03:25:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:25:13,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-28 03:25:13,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=14076, Unknown=0, NotChecked=0, Total=14520 [2024-11-28 03:25:13,772 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:25:23,534 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2024-11-28 03:25:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 03:25:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 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 151 [2024-11-28 03:25:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:25:23,535 INFO L225 Difference]: With dead ends: 233 [2024-11-28 03:25:23,535 INFO L226 Difference]: Without dead ends: 159 [2024-11-28 03:25:23,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4881 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1233, Invalid=29567, Unknown=0, NotChecked=0, Total=30800 [2024-11-28 03:25:23,537 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 45 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 8526 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 8575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 8526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:25:23,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2989 Invalid, 8575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 8526 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 03:25:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-28 03:25:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2024-11-28 03:25:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2024-11-28 03:25:23,540 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2024-11-28 03:25:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:25:23,540 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2024-11-28 03:25:23,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2024-11-28 03:25:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-28 03:25:23,541 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:25:23,541 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:25:23,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:25:23,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-28 03:25:23,743 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:25:23,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:25:23,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1246752664, now seen corresponding path program 34 times [2024-11-28 03:25:23,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:25:23,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744345937] [2024-11-28 03:25:23,743 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:25:23,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:25:23,832 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:25:23,833 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 561 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:26,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:25:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744345937] [2024-11-28 03:25:26,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744345937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:25:26,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540020962] [2024-11-28 03:25:26,211 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:25:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:25:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:25:26,213 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:25:26,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:25:27,816 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:25:27,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:27,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-11-28 03:25:27,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:25:27,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:25:27,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:25:27,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:25:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:33,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:25:39,493 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:25:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540020962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:25:39,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:25:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 43] total 125 [2024-11-28 03:25:39,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262825640] [2024-11-28 03:25:39,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:25:39,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-11-28 03:25:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:25:39,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-11-28 03:25:39,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=14659, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 03:25:39,649 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 126 states, 125 states have (on average 3.704) internal successors, (463), 126 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:25:47,938 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2024-11-28 03:25:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 03:25:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 3.704) internal successors, (463), 126 states have internal predecessors, (463), 0 states have call successors, (0), 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 155 [2024-11-28 03:25:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:25:47,939 INFO L225 Difference]: With dead ends: 170 [2024-11-28 03:25:47,939 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 03:25:47,939 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5977 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=2135, Invalid=25587, Unknown=0, NotChecked=0, Total=27722 [2024-11-28 03:25:47,940 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 64 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 7519 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 7539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:25:47,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2523 Invalid, 7539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7519 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 03:25:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 03:25:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2024-11-28 03:25:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-11-28 03:25:47,943 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2024-11-28 03:25:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:25:47,944 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-11-28 03:25:47,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 3.704) internal successors, (463), 126 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:25:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-11-28 03:25:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-28 03:25:47,945 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:25:47,945 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:25:47,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 03:25:48,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-28 03:25:48,146 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:25:48,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:25:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1155848225, now seen corresponding path program 35 times [2024-11-28 03:25:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:25:48,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100402771] [2024-11-28 03:25:48,146 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:25:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:25:48,241 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 03:25:48,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:25:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 703 proven. 649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:25:50,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:25:50,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100402771] [2024-11-28 03:25:50,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100402771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:25:50,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329103302] [2024-11-28 03:25:50,768 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:25:50,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:25:50,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:25:50,770 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:25:50,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:26:02,213 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-28 03:26:02,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:26:02,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-28 03:26:02,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:26:03,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:26:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:04,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:26:05,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:26:05,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:26:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329103302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:26:05,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:26:05,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 89 [2024-11-28 03:26:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439301051] [2024-11-28 03:26:05,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:26:05,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-28 03:26:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:26:05,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-28 03:26:05,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=7456, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 03:26:05,303 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:26:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:26:13,309 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2024-11-28 03:26:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 03:26:13,309 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 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 159 [2024-11-28 03:26:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:26:13,310 INFO L225 Difference]: With dead ends: 245 [2024-11-28 03:26:13,310 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 03:26:13,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1231, Invalid=20821, Unknown=0, NotChecked=0, Total=22052 [2024-11-28 03:26:13,312 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 7445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:26:13,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2537 Invalid, 7445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-28 03:26:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 03:26:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2024-11-28 03:26:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:26:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2024-11-28 03:26:13,315 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 159 [2024-11-28 03:26:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:26:13,315 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2024-11-28 03:26:13,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:26:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2024-11-28 03:26:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-28 03:26:13,317 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:26:13,317 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:26:13,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-28 03:26:13,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:26:13,518 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:26:13,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:26:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1083052538, now seen corresponding path program 36 times [2024-11-28 03:26:13,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:26:13,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307848943] [2024-11-28 03:26:13,518 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:26:13,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:26:13,650 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-11-28 03:26:13,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:26:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 561 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:26:15,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:26:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307848943] [2024-11-28 03:26:15,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307848943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:26:15,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951471694] [2024-11-28 03:26:15,488 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:26:15,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:26:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:26:15,490 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:26:15,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:27:17,299 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-11-28 03:27:17,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:27:17,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-28 03:27:17,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:27:17,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:27:17,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 03:27:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 1425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:24,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:27:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 1425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:30,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951471694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:27:30,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:27:30,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 45, 46] total 132 [2024-11-28 03:27:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459571385] [2024-11-28 03:27:30,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:27:30,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-28 03:27:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:27:30,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-28 03:27:30,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1787, Invalid=15769, Unknown=0, NotChecked=0, Total=17556 [2024-11-28 03:27:30,501 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 133 states, 132 states have (on average 3.6893939393939394) internal successors, (487), 133 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:27:40,149 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2024-11-28 03:27:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-28 03:27:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 3.6893939393939394) internal successors, (487), 133 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2024-11-28 03:27:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:27:40,151 INFO L225 Difference]: With dead ends: 260 [2024-11-28 03:27:40,151 INFO L226 Difference]: Without dead ends: 260 [2024-11-28 03:27:40,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9921 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=3562, Invalid=33110, Unknown=0, NotChecked=0, Total=36672 [2024-11-28 03:27:40,153 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 127 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 5906 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 5961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:27:40,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1949 Invalid, 5961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5906 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 03:27:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-28 03:27:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2024-11-28 03:27:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2024-11-28 03:27:40,157 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 163 [2024-11-28 03:27:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:27:40,157 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2024-11-28 03:27:40,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 3.6893939393939394) internal successors, (487), 133 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2024-11-28 03:27:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-28 03:27:40,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:27:40,158 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:27:40,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:27:40,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-28 03:27:40,359 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:27:40,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:27:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1189331123, now seen corresponding path program 37 times [2024-11-28 03:27:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:27:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251610570] [2024-11-28 03:27:40,360 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:27:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:27:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:27:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 723 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:27:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251610570] [2024-11-28 03:27:43,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251610570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:27:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244041381] [2024-11-28 03:27:43,247 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:27:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:27:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:27:43,249 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:27:43,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:27:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:27:43,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-28 03:27:43,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:27:44,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:27:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 59 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:46,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:27:46,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:27:46,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:27:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 59 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:47,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244041381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:27:47,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:27:47,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2024-11-28 03:27:47,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918201586] [2024-11-28 03:27:47,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:27:47,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-28 03:27:47,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:27:47,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-28 03:27:47,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=7989, Unknown=0, NotChecked=0, Total=8372 [2024-11-28 03:27:47,175 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:27:56,010 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2024-11-28 03:27:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-28 03:27:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 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 167 [2024-11-28 03:27:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:27:56,011 INFO L225 Difference]: With dead ends: 257 [2024-11-28 03:27:56,012 INFO L226 Difference]: Without dead ends: 175 [2024-11-28 03:27:56,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4059 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1261, Invalid=21995, Unknown=0, NotChecked=0, Total=23256 [2024-11-28 03:27:56,013 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 2692 mSDsCounter, 0 mSdLazyCounter, 7982 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 8037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:27:56,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2737 Invalid, 8037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 7982 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 03:27:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-28 03:27:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2024-11-28 03:27:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2024-11-28 03:27:56,016 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2024-11-28 03:27:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:27:56,016 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2024-11-28 03:27:56,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:27:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2024-11-28 03:27:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-28 03:27:56,017 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:27:56,017 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:27:56,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 03:27:56,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-28 03:27:56,218 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:27:56,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:27:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1950749068, now seen corresponding path program 38 times [2024-11-28 03:27:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:27:56,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944176437] [2024-11-28 03:27:56,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:27:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:27:56,262 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:27:56,262 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:27:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 630 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:27:58,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:27:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944176437] [2024-11-28 03:27:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944176437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:27:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698376028] [2024-11-28 03:27:58,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:27:58,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:27:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:27:58,639 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:27:58,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:27:59,053 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:27:59,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:27:59,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-11-28 03:27:59,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:27:59,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:27:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:27:59,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-28 03:28:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 703 proven. 877 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:28:04,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:28:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:28:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 780 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:28:10,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698376028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:28:10,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:28:10,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 132 [2024-11-28 03:28:10,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588310057] [2024-11-28 03:28:10,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:28:10,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-28 03:28:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:28:10,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-28 03:28:10,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=15577, Unknown=0, NotChecked=0, Total=17556 [2024-11-28 03:28:10,315 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:28:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:28:13,087 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2024-11-28 03:28:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 03:28:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 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 171 [2024-11-28 03:28:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:28:13,089 INFO L225 Difference]: With dead ends: 178 [2024-11-28 03:28:13,089 INFO L226 Difference]: Without dead ends: 178 [2024-11-28 03:28:13,089 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2048, Invalid=16042, Unknown=0, NotChecked=0, Total=18090 [2024-11-28 03:28:13,089 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 4500 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 4501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:28:13,090 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1531 Invalid, 4501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4500 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 03:28:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-28 03:28:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2024-11-28 03:28:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:28:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2024-11-28 03:28:13,093 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 171 [2024-11-28 03:28:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:28:13,093 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2024-11-28 03:28:13,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:28:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2024-11-28 03:28:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-28 03:28:13,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:28:13,094 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:28:13,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-28 03:28:13,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:28:13,295 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:28:13,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:28:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 661805243, now seen corresponding path program 39 times [2024-11-28 03:28:13,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:28:13,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146590903] [2024-11-28 03:28:13,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:28:13,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:28:13,433 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-28 03:28:13,433 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:28:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 801 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:28:16,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:28:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146590903] [2024-11-28 03:28:16,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146590903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:28:16,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051394724] [2024-11-28 03:28:16,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:28:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:28:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:28:16,609 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:28:16,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:29:35,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-28 03:29:35,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:29:35,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-28 03:29:35,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:29:36,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 03:29:39,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 03:29:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 62 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:39,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:29:41,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:29:41,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:29:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 62 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:29:44,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051394724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:29:44,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:29:44,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 139 [2024-11-28 03:29:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220570008] [2024-11-28 03:29:44,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:29:44,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-28 03:29:44,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:29:44,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-28 03:29:44,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=18640, Unknown=0, NotChecked=0, Total=19182 [2024-11-28 03:29:44,109 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 139 states, 139 states have (on average 3.676258992805755) internal successors, (511), 139 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:29:58,104 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2024-11-28 03:29:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-28 03:29:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 3.676258992805755) internal successors, (511), 139 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2024-11-28 03:29:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:29:58,105 INFO L225 Difference]: With dead ends: 269 [2024-11-28 03:29:58,105 INFO L226 Difference]: Without dead ends: 183 [2024-11-28 03:29:58,107 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6504 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1562, Invalid=39850, Unknown=0, NotChecked=0, Total=41412 [2024-11-28 03:29:58,108 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 48 mSDsluCounter, 3954 mSDsCounter, 0 mSdLazyCounter, 11498 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4002 SdHoareTripleChecker+Invalid, 11557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:29:58,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4002 Invalid, 11557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11498 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 03:29:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-28 03:29:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2024-11-28 03:29:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2024-11-28 03:29:58,111 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 175 [2024-11-28 03:29:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:29:58,111 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2024-11-28 03:29:58,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 3.676258992805755) internal successors, (511), 139 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:29:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2024-11-28 03:29:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-28 03:29:58,113 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:29:58,113 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:29:58,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 03:29:58,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:29:58,313 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:29:58,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:29:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1801318626, now seen corresponding path program 40 times [2024-11-28 03:29:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:29:58,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424731979] [2024-11-28 03:29:58,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:29:58,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:29:58,773 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:29:58,773 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:30:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 780 proven. 963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:30:01,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:30:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424731979] [2024-11-28 03:30:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424731979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:30:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647884409] [2024-11-28 03:30:01,651 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:30:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:30:01,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:30:01,653 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:30:01,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:30:06,720 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:30:06,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:30:06,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-11-28 03:30:06,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:30:06,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-28 03:30:06,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-28 03:30:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 780 proven. 963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:30:13,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:30:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:30:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 861 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:30:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647884409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:30:19,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:30:19,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 138 [2024-11-28 03:30:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042062903] [2024-11-28 03:30:19,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:30:19,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-28 03:30:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:30:19,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-28 03:30:19,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1950, Invalid=17232, Unknown=0, NotChecked=0, Total=19182 [2024-11-28 03:30:19,009 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 139 states, 138 states have (on average 3.8768115942028984) internal successors, (535), 139 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:30:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:30:23,185 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2024-11-28 03:30:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 03:30:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 138 states have (on average 3.8768115942028984) internal successors, (535), 139 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2024-11-28 03:30:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:30:23,187 INFO L225 Difference]: With dead ends: 186 [2024-11-28 03:30:23,187 INFO L226 Difference]: Without dead ends: 186 [2024-11-28 03:30:23,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6350 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2018, Invalid=17442, Unknown=0, NotChecked=0, Total=19460 [2024-11-28 03:30:23,188 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 7680 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2634 SdHoareTripleChecker+Invalid, 7681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:30:23,188 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2634 Invalid, 7681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7680 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-28 03:30:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-28 03:30:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-11-28 03:30:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:30:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2024-11-28 03:30:23,191 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2024-11-28 03:30:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:30:23,192 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2024-11-28 03:30:23,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 138 states have (on average 3.8768115942028984) internal successors, (535), 139 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:30:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2024-11-28 03:30:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-28 03:30:23,193 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:30:23,193 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:30:23,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 03:30:23,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-28 03:30:23,394 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:30:23,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:30:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1219267543, now seen corresponding path program 41 times [2024-11-28 03:30:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:30:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672485373] [2024-11-28 03:30:23,394 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:30:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:30:23,504 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 03:30:23,504 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:30:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 946 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:30:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:30:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672485373] [2024-11-28 03:30:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672485373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:30:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035793924] [2024-11-28 03:30:26,503 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:30:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:30:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:30:26,504 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:30:26,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:31:22,014 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 03:31:22,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:31:22,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-28 03:31:22,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:31:23,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 03:31:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 65 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:31:25,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:31:25,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 03:31:25,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-28 03:31:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 65 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:31:26,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035793924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:31:26,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:31:26,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 101 [2024-11-28 03:31:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615723091] [2024-11-28 03:31:26,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:31:26,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-28 03:31:26,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:31:26,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-28 03:31:26,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=9637, Unknown=0, NotChecked=0, Total=10100 [2024-11-28 03:31:26,065 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:31:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:31:36,877 INFO L93 Difference]: Finished difference Result 281 states and 282 transitions. [2024-11-28 03:31:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 03:31:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 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 183 [2024-11-28 03:31:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:31:36,879 INFO L225 Difference]: With dead ends: 281 [2024-11-28 03:31:36,879 INFO L226 Difference]: Without dead ends: 191 [2024-11-28 03:31:36,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5088 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1549, Invalid=27181, Unknown=0, NotChecked=0, Total=28730 [2024-11-28 03:31:36,880 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 115 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 9475 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 9558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:31:36,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 3245 Invalid, 9558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9475 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 03:31:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-28 03:31:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-11-28 03:31:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:31:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2024-11-28 03:31:36,883 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 183 [2024-11-28 03:31:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:31:36,883 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2024-11-28 03:31:36,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:31:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2024-11-28 03:31:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-28 03:31:36,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:31:36,884 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:31:36,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 03:31:37,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-28 03:31:37,084 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-28 03:31:37,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:31:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash 412349776, now seen corresponding path program 42 times [2024-11-28 03:31:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:31:37,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994519737] [2024-11-28 03:31:37,085 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:31:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:31:37,230 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-11-28 03:31:37,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:31:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 780 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:31:39,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:31:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994519737] [2024-11-28 03:31:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994519737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:31:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240601087] [2024-11-28 03:31:39,514 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:31:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:31:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:31:39,516 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:31:39,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e4185a1-7f6f-41ae-876f-41ff900d08f0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process