./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --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_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/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_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/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_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:23:37,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:23:37,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 05:23:37,197 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:23:37,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:23:37,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:23:37,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:23:37,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:23:37,236 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:23:37,236 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:23:37,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:23:37,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:23:37,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:23:37,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:23:37,237 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:23:37,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:23:37,238 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:23:37,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:23:37,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:23:37,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:23:37,238 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 05:23:37,239 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:23:37,240 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:23:37,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:23:37,240 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:23:37,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:23:37,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:23:37,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:23:37,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:23:37,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:23:37,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:23:37,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:23:37,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:23:37,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:23:37,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:23:37,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:23:37,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:23:37,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:23:37,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:23:37,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:23:37,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:23:37,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:23:37,243 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_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/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 -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2024-11-28 05:23:37,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:23:37,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:23:37,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:23:37,664 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:23:37,664 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:23:37,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2024-11-28 05:23:41,032 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/data/433a103f6/d8177b046556421889e6bdd3d631e826/FLAGdd89bcbd1 [2024-11-28 05:23:41,332 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:23:41,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2024-11-28 05:23:41,342 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/data/433a103f6/d8177b046556421889e6bdd3d631e826/FLAGdd89bcbd1 [2024-11-28 05:23:41,358 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/data/433a103f6/d8177b046556421889e6bdd3d631e826 [2024-11-28 05:23:41,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:23:41,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:23:41,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:23:41,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:23:41,370 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:23:41,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f4f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41, skipping insertion in model container [2024-11-28 05:23:41,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:23:41,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:23:41,650 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:23:41,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:23:41,699 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:23:41,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41 WrapperNode [2024-11-28 05:23:41,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:23:41,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:23:41,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:23:41,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:23:41,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,751 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-11-28 05:23:41,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:23:41,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:23:41,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:23:41,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:23:41,765 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,791 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [1, 0]. [2024-11-28 05:23:41,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,804 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:23:41,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:23:41,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:23:41,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:23:41,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (1/1) ... [2024-11-28 05:23:41,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:23:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:41,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:23:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:23:41,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:23:41,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:23:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:23:42,023 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:23:42,026 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:23:42,332 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-28 05:23:42,332 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:23:42,345 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:23:42,346 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 05:23:42,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:23:42 BoogieIcfgContainer [2024-11-28 05:23:42,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:23:42,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:23:42,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:23:42,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:23:42,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:23:41" (1/3) ... [2024-11-28 05:23:42,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3eb174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:23:42, skipping insertion in model container [2024-11-28 05:23:42,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:23:41" (2/3) ... [2024-11-28 05:23:42,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3eb174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:23:42, skipping insertion in model container [2024-11-28 05:23:42,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:23:42" (3/3) ... [2024-11-28 05:23:42,361 INFO L128 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2024-11-28 05:23:42,382 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:23:42,384 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ArraysWithLenghtAtDeclaration_-write.c that has 1 procedures, 29 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-11-28 05:23:42,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:23:42,476 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;@3efc368d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:23:42,476 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-28 05:23:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.75) internal successors, (35), 28 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 05:23:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 05:23:42,490 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:42,491 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:23:42,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:42,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:42,503 INFO L85 PathProgramCache]: Analyzing trace with hash 890553482, now seen corresponding path program 1 times [2024-11-28 05:23:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685041739] [2024-11-28 05:23:42,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:42,708 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 05:23:42,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685041739] [2024-11-28 05:23:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685041739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:42,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:23:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137256949] [2024-11-28 05:23:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:42,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:23:42,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:42,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:23:42,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:23:42,749 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.75) internal successors, (35), 28 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 05:23:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:42,761 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2024-11-28 05:23:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:23:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 05:23:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:42,771 INFO L225 Difference]: With dead ends: 29 [2024-11-28 05:23:42,771 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 05:23:42,773 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:23:42,776 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:42,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:23:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 05:23:42,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 05:23:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 26 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 05:23:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-28 05:23:42,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2024-11-28 05:23:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:42,818 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-28 05:23:42,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 05:23:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-28 05:23:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 05:23:42,819 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:42,819 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:23:42,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:23:42,820 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:42,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash 889601163, now seen corresponding path program 1 times [2024-11-28 05:23:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862611727] [2024-11-28 05:23:42,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:42,960 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 05:23:42,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862611727] [2024-11-28 05:23:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862611727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:23:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210572683] [2024-11-28 05:23:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:42,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:23:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:42,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:23:42,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:23:42,964 INFO L87 Difference]: Start difference. First operand 27 states and 30 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 05:23:43,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:43,032 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-28 05:23:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:23:43,033 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 05:23:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:43,034 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:23:43,034 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:23:43,035 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 05:23:43,036 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:43,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:23:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-11-28 05:23:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.5714285714285714) 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 05:23:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-28 05:23:43,042 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-11-28 05:23:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:43,042 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-28 05:23:43,043 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 05:23:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-28 05:23:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-28 05:23:43,043 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:43,044 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 05:23:43,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:23:43,044 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:43,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash 889689543, now seen corresponding path program 1 times [2024-11-28 05:23:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:43,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929314234] [2024-11-28 05:23:43,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:43,191 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 05:23:43,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:43,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929314234] [2024-11-28 05:23:43,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929314234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:43,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:43,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:23:43,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083217459] [2024-11-28 05:23:43,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:43,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:23:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:43,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:23:43,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:23:43,194 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 2.0) 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 05:23:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:43,276 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-28 05:23:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:23:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 05:23:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:43,278 INFO L225 Difference]: With dead ends: 49 [2024-11-28 05:23:43,278 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 05:23:43,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:23:43,279 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:43,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 05:23:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2024-11-28 05:23:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 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 05:23:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-28 05:23:43,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 6 [2024-11-28 05:23:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:43,286 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-28 05:23:43,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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 05:23:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-28 05:23:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 05:23:43,286 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:43,286 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:43,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:23:43,287 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:43,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832333, now seen corresponding path program 1 times [2024-11-28 05:23:43,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:43,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793302690] [2024-11-28 05:23:43,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:43,438 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 05:23:43,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:43,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793302690] [2024-11-28 05:23:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793302690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:23:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663739483] [2024-11-28 05:23:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:43,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:23:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:43,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:23:43,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:23:43,443 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:43,515 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-11-28 05:23:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:23:43,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 05:23:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:43,517 INFO L225 Difference]: With dead ends: 30 [2024-11-28 05:23:43,517 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 05:23:43,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:23:43,519 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:43,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:23:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 05:23:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 05:23:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 29 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 05:23:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-28 05:23:43,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 7 [2024-11-28 05:23:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:43,531 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-28 05:23:43,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-28 05:23:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 05:23:43,531 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:43,532 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:43,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 05:23:43,532 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:43,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1807832334, now seen corresponding path program 1 times [2024-11-28 05:23:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47605554] [2024-11-28 05:23:43,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:43,879 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 05:23:43,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47605554] [2024-11-28 05:23:43,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47605554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:43,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:23:43,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167822880] [2024-11-28 05:23:43,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:43,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:23:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:43,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:23:43,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:23:43,882 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:44,006 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-28 05:23:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:23:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 05:23:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:44,007 INFO L225 Difference]: With dead ends: 33 [2024-11-28 05:23:44,007 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:23:44,008 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 05:23:44,009 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:44,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:23:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-28 05:23:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 30 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 05:23:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-11-28 05:23:44,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2024-11-28 05:23:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:44,018 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-11-28 05:23:44,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-11-28 05:23:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-28 05:23:44,022 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:44,022 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:44,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:23:44,022 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:44,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash 208295028, now seen corresponding path program 1 times [2024-11-28 05:23:44,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:44,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875535889] [2024-11-28 05:23:44,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:44,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:44,165 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 05:23:44,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:44,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875535889] [2024-11-28 05:23:44,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875535889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:44,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:44,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:23:44,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445455318] [2024-11-28 05:23:44,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:44,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:23:44,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:44,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:23:44,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:23:44,169 INFO L87 Difference]: Start difference. First operand 31 states and 35 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 05:23:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:44,299 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-11-28 05:23:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:23:44,300 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 05:23:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:44,301 INFO L225 Difference]: With dead ends: 50 [2024-11-28 05:23:44,301 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 05:23:44,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:23:44,303 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:44,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 05:23:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2024-11-28 05:23:44,307 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 05:23:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-28 05:23:44,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-11-28 05:23:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:44,308 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-28 05:23:44,308 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 05:23:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-28 05:23:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 05:23:44,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:44,309 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:44,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 05:23:44,312 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:44,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1756862701, now seen corresponding path program 1 times [2024-11-28 05:23:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724585168] [2024-11-28 05:23:44,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:44,480 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 05:23:44,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:44,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724585168] [2024-11-28 05:23:44,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724585168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:44,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363017642] [2024-11-28 05:23:44,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:44,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:44,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:44,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:23:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:44,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:23:44,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:44,638 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 05:23:44,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:44,715 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 05:23:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363017642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:44,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:44,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-28 05:23:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16488999] [2024-11-28 05:23:44,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:44,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:23:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:44,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:23:44,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:23:44,718 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 05:23:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:44,837 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-28 05:23:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:23:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 05:23:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:44,840 INFO L225 Difference]: With dead ends: 48 [2024-11-28 05:23:44,840 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 05:23:44,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:23:44,841 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:44,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 05:23:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-11-28 05:23:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 43 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 05:23:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-28 05:23:44,856 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2024-11-28 05:23:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:44,856 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-28 05:23:44,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 05:23:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-28 05:23:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 05:23:44,857 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:44,857 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:44,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:23:45,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:45,061 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:45,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1371831174, now seen corresponding path program 1 times [2024-11-28 05:23:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587115366] [2024-11-28 05:23:45,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:45,274 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 05:23:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587115366] [2024-11-28 05:23:45,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587115366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718590085] [2024-11-28 05:23:45,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:45,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:45,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:45,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:23:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:45,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:23:45,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:45,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 05:23:45,638 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 05:23:45,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:45,832 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 05:23:45,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718590085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:45,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:45,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-28 05:23:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140738251] [2024-11-28 05:23:45,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:45,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:23:45,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:45,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:23:45,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:23:45,836 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 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 05:23:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:46,102 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-11-28 05:23:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:23:46,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-28 05:23:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:46,103 INFO L225 Difference]: With dead ends: 49 [2024-11-28 05:23:46,103 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 05:23:46,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:46,105 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:46,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 05:23:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-28 05:23:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.368421052631579) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-28 05:23:46,117 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 11 [2024-11-28 05:23:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:46,117 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-28 05:23:46,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 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 05:23:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-28 05:23:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-28 05:23:46,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:46,118 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:46,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:23:46,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:46,323 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:46,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -422839044, now seen corresponding path program 1 times [2024-11-28 05:23:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054966731] [2024-11-28 05:23:46,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:46,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054966731] [2024-11-28 05:23:46,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054966731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086445920] [2024-11-28 05:23:46,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:46,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:46,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:46,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:23:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:46,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:23:46,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:46,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086445920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:46,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:46,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-28 05:23:46,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105924268] [2024-11-28 05:23:46,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:46,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:23:46,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:46,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:23:46,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:23:46,647 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 05:23:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:46,882 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2024-11-28 05:23:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:23:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) Word has length 12 [2024-11-28 05:23:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:46,884 INFO L225 Difference]: With dead ends: 73 [2024-11-28 05:23:46,884 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 05:23:46,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:46,885 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:46,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 05:23:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2024-11-28 05:23:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 05:23:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-28 05:23:46,896 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2024-11-28 05:23:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:46,898 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-28 05:23:46,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 05:23:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-28 05:23:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 05:23:46,899 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:46,899 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:46,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:23:47,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:47,100 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:47,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -275373692, now seen corresponding path program 2 times [2024-11-28 05:23:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474187922] [2024-11-28 05:23:47,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:47,116 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:23:47,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:47,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:47,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474187922] [2024-11-28 05:23:47,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474187922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:47,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:47,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:23:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755970499] [2024-11-28 05:23:47,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:47,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:23:47,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:47,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:23:47,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:23:47,184 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:23:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:47,216 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-11-28 05:23:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:23:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 05:23:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:47,218 INFO L225 Difference]: With dead ends: 41 [2024-11-28 05:23:47,218 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 05:23:47,218 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 05:23:47,219 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:47,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:23:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 05:23:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-28 05:23:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 05:23:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-28 05:23:47,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 16 [2024-11-28 05:23:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:47,224 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-28 05:23:47,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:23:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-28 05:23:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 05:23:47,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:47,225 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:47,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:23:47,225 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:47,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash -275373691, now seen corresponding path program 1 times [2024-11-28 05:23:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708473157] [2024-11-28 05:23:47,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:47,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708473157] [2024-11-28 05:23:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708473157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:47,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:23:47,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:23:47,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470700080] [2024-11-28 05:23:47,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:47,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:23:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:47,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:23:47,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:23:47,454 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:23:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:47,508 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2024-11-28 05:23:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:23:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 05:23:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:47,510 INFO L225 Difference]: With dead ends: 67 [2024-11-28 05:23:47,510 INFO L226 Difference]: Without dead ends: 67 [2024-11-28 05:23:47,510 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 05:23:47,511 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:47,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:23:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-28 05:23:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2024-11-28 05:23:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-11-28 05:23:47,516 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 16 [2024-11-28 05:23:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:47,517 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-11-28 05:23:47,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 05:23:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-11-28 05:23:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-28 05:23:47,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:47,518 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:47,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 05:23:47,518 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:47,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1884296825, now seen corresponding path program 1 times [2024-11-28 05:23:47,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:47,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162210026] [2024-11-28 05:23:47,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:47,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:47,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162210026] [2024-11-28 05:23:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162210026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447120004] [2024-11-28 05:23:47,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:47,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:47,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:47,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:23:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:47,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:23:47,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:47,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:47,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 05:23:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:48,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447120004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:48,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:48,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-28 05:23:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985827873] [2024-11-28 05:23:48,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:48,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:23:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:48,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:23:48,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:23:48,078 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 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 05:23:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:48,255 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-11-28 05:23:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:23:48,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 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) Word has length 21 [2024-11-28 05:23:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:48,257 INFO L225 Difference]: With dead ends: 69 [2024-11-28 05:23:48,257 INFO L226 Difference]: Without dead ends: 69 [2024-11-28 05:23:48,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:23:48,259 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:48,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 47 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-28 05:23:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2024-11-28 05:23:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-11-28 05:23:48,271 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 21 [2024-11-28 05:23:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:48,271 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-11-28 05:23:48,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 9 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 05:23:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-11-28 05:23:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 05:23:48,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:48,274 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-28 05:23:48,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:48,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:48,479 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:48,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1566323029, now seen corresponding path program 2 times [2024-11-28 05:23:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:48,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160181181] [2024-11-28 05:23:48,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:48,512 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:48,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160181181] [2024-11-28 05:23:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160181181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088749217] [2024-11-28 05:23:48,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:48,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:48,741 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:23:48,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:48,830 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:48,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:23:48,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:48,970 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:23:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088749217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:23:48,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:23:48,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-28 05:23:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046444493] [2024-11-28 05:23:48,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:23:48,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:23:48,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:48,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:23:48,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:23:48,975 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 05:23:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:49,125 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-28 05:23:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:23:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 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 05:23:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:49,127 INFO L225 Difference]: With dead ends: 57 [2024-11-28 05:23:49,127 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 05:23:49,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:49,128 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:49,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 47 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 05:23:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-28 05:23:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 05:23:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2024-11-28 05:23:49,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 22 [2024-11-28 05:23:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:49,138 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2024-11-28 05:23:49,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 05:23:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2024-11-28 05:23:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 05:23:49,141 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:49,142 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:49,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:23:49,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:23:49,343 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:49,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash 135841243, now seen corresponding path program 1 times [2024-11-28 05:23:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255955512] [2024-11-28 05:23:49,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255955512] [2024-11-28 05:23:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255955512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028949705] [2024-11-28 05:23:49,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:49,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:49,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:23:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:49,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:23:49,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:49,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:23:49,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028949705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:49,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2024-11-28 05:23:49,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756271513] [2024-11-28 05:23:49,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:49,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 05:23:49,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:49,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 05:23:49,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:23:49,933 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 05:23:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:50,208 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2024-11-28 05:23:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:23:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2024-11-28 05:23:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:50,209 INFO L225 Difference]: With dead ends: 119 [2024-11-28 05:23:50,209 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 05:23:50,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:23:50,211 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:50,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 68 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:23:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 05:23:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2024-11-28 05:23:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 114 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 05:23:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2024-11-28 05:23:50,218 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 24 [2024-11-28 05:23:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:50,219 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2024-11-28 05:23:50,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 05:23:50,219 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2024-11-28 05:23:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 05:23:50,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:50,220 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-28 05:23:50,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:23:50,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:23:50,421 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:50,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1423184516, now seen corresponding path program 1 times [2024-11-28 05:23:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:50,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827936379] [2024-11-28 05:23:50,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:50,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:50,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:50,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827936379] [2024-11-28 05:23:50,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827936379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:50,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458377453] [2024-11-28 05:23:50,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:50,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:50,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:50,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:23:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:50,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:23:50,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:50,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:51,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458377453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:51,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:51,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-28 05:23:51,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111664874] [2024-11-28 05:23:51,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:51,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:23:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:51,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:23:51,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:23:51,110 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:51,440 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2024-11-28 05:23:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:23:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-28 05:23:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:51,441 INFO L225 Difference]: With dead ends: 115 [2024-11-28 05:23:51,441 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 05:23:51,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:23:51,442 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:51,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:23:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 05:23:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-28 05:23:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 05:23:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2024-11-28 05:23:51,453 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 31 [2024-11-28 05:23:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:51,453 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2024-11-28 05:23:51,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2024-11-28 05:23:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:23:51,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:51,454 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-28 05:23:51,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:51,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:51,655 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:51,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1224350604, now seen corresponding path program 2 times [2024-11-28 05:23:51,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:51,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944420463] [2024-11-28 05:23:51,656 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:51,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:51,700 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:51,703 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:51,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944420463] [2024-11-28 05:23:51,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944420463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:51,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098897738] [2024-11-28 05:23:51,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:51,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:51,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:51,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:23:52,092 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:52,092 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:52,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:23:52,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:52,122 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 05:23:52,135 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 05:23:52,149 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 05:23:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:52,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:52,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098897738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:52,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:52,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2024-11-28 05:23:52,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113984145] [2024-11-28 05:23:52,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:52,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:23:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:52,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:23:52,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:23:52,939 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:53,151 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2024-11-28 05:23:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:23:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 05:23:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:53,153 INFO L225 Difference]: With dead ends: 144 [2024-11-28 05:23:53,153 INFO L226 Difference]: Without dead ends: 144 [2024-11-28 05:23:53,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:23:53,154 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:53,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:23:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-28 05:23:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2024-11-28 05:23:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 137 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 159 transitions. [2024-11-28 05:23:53,162 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 159 transitions. Word has length 35 [2024-11-28 05:23:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:53,162 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 159 transitions. [2024-11-28 05:23:53,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:23:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 159 transitions. [2024-11-28 05:23:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:23:53,163 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:53,164 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:53,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:23:53,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:53,368 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:53,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -285031318, now seen corresponding path program 1 times [2024-11-28 05:23:53,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:53,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556436862] [2024-11-28 05:23:53,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:53,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:23:53,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:53,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556436862] [2024-11-28 05:23:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556436862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:53,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314952177] [2024-11-28 05:23:53,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:53,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:53,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:23:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:53,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:23:53,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:23:53,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 05:23:54,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314952177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:54,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:54,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-11-28 05:23:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784488353] [2024-11-28 05:23:54,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:54,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:23:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:54,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:23:54,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:23:54,084 INFO L87 Difference]: Start difference. First operand 138 states and 159 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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 05:23:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:54,367 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2024-11-28 05:23:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:23:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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) Word has length 37 [2024-11-28 05:23:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:54,369 INFO L225 Difference]: With dead ends: 132 [2024-11-28 05:23:54,369 INFO L226 Difference]: Without dead ends: 132 [2024-11-28 05:23:54,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:23:54,370 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:54,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:23:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-28 05:23:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-28 05:23:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1732283464566928) internal successors, (149), 131 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 05:23:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2024-11-28 05:23:54,376 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 37 [2024-11-28 05:23:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:54,377 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2024-11-28 05:23:54,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 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 05:23:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2024-11-28 05:23:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 05:23:54,378 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:54,378 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2024-11-28 05:23:54,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:54,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:23:54,583 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:54,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1486412605, now seen corresponding path program 2 times [2024-11-28 05:23:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:54,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324525882] [2024-11-28 05:23:54,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:54,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:54,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:54,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324525882] [2024-11-28 05:23:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324525882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56848514] [2024-11-28 05:23:55,011 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:55,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:55,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:23:55,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:55,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:55,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:23:55,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:55,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 37 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 05:23:55,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56848514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:55,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:55,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2024-11-28 05:23:55,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463461168] [2024-11-28 05:23:55,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:55,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:23:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:55,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:23:55,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:23:55,629 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 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 05:23:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:56,117 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2024-11-28 05:23:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:23:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 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 56 [2024-11-28 05:23:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:56,118 INFO L225 Difference]: With dead ends: 130 [2024-11-28 05:23:56,118 INFO L226 Difference]: Without dead ends: 130 [2024-11-28 05:23:56,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:23:56,119 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:56,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:23:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-28 05:23:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-28 05:23:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.152) internal successors, (144), 129 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 05:23:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-11-28 05:23:56,125 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 56 [2024-11-28 05:23:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:56,126 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-11-28 05:23:56,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 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 05:23:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-11-28 05:23:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 05:23:56,128 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:56,128 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-28 05:23:56,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:23:56,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:23:56,329 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:56,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -466990134, now seen corresponding path program 3 times [2024-11-28 05:23:56,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:56,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610416167] [2024-11-28 05:23:56,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:23:56,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:56,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:23:56,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-11-28 05:23:56,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:56,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610416167] [2024-11-28 05:23:56,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610416167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307194073] [2024-11-28 05:23:56,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:23:56,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:56,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:56,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:23:56,953 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:23:56,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:56,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:23:56,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 222 proven. 71 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-28 05:23:57,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 222 proven. 71 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-28 05:23:57,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307194073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:57,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:23:57,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2024-11-28 05:23:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276541276] [2024-11-28 05:23:57,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:57,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:23:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:57,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:23:57,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:23:57,833 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 30 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 05:23:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:58,844 INFO L93 Difference]: Finished difference Result 198 states and 221 transitions. [2024-11-28 05:23:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:23:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 0 states have call successors, (0), 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 05:23:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:58,846 INFO L225 Difference]: With dead ends: 198 [2024-11-28 05:23:58,847 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 05:23:58,848 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:23:58,853 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:58,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 80 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:23:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 05:23:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2024-11-28 05:23:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 184 states have internal predecessors, (205), 0 states have call successors, (0), 0 states 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 05:23:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 205 transitions. [2024-11-28 05:23:58,864 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 205 transitions. Word has length 75 [2024-11-28 05:23:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:58,864 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 205 transitions. [2024-11-28 05:23:58,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 30 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 05:23:58,865 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 205 transitions. [2024-11-28 05:23:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 05:23:58,866 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:58,866 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-28 05:23:58,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:23:59,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:59,067 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:23:59,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:59,068 INFO L85 PathProgramCache]: Analyzing trace with hash 944891959, now seen corresponding path program 1 times [2024-11-28 05:23:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182742600] [2024-11-28 05:23:59,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-28 05:23:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182742600] [2024-11-28 05:23:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182742600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:23:59,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954946894] [2024-11-28 05:23:59,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:23:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:59,702 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:59,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:23:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:23:59,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:23:59,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:59,880 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 05:24:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-28 05:24:00,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-11-28 05:24:01,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954946894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:01,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:01,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-28 05:24:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118916498] [2024-11-28 05:24:01,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:01,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:24:01,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:01,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:24:01,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:24:01,016 INFO L87 Difference]: Start difference. First operand 185 states and 205 transitions. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 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 05:24:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:01,542 INFO L93 Difference]: Finished difference Result 239 states and 279 transitions. [2024-11-28 05:24:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:24:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 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) Word has length 80 [2024-11-28 05:24:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:01,545 INFO L225 Difference]: With dead ends: 239 [2024-11-28 05:24:01,545 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 05:24:01,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:24:01,547 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:01,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 74 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:24:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 05:24:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 227. [2024-11-28 05:24:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.2027027027027026) internal successors, (267), 226 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 05:24:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 267 transitions. [2024-11-28 05:24:01,556 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 267 transitions. Word has length 80 [2024-11-28 05:24:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:01,556 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 267 transitions. [2024-11-28 05:24:01,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 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 05:24:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 267 transitions. [2024-11-28 05:24:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 05:24:01,558 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:01,558 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:01,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:24:01,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:01,759 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:01,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1405204414, now seen corresponding path program 2 times [2024-11-28 05:24:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286830001] [2024-11-28 05:24:01,759 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:01,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:24:01,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2024-11-28 05:24:01,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:01,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286830001] [2024-11-28 05:24:01,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286830001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:24:01,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:24:01,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:24:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131901329] [2024-11-28 05:24:01,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:24:01,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:24:01,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:01,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:24:01,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:24:01,903 INFO L87 Difference]: Start difference. First operand 227 states and 267 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 05:24:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:01,942 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2024-11-28 05:24:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:24:01,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-28 05:24:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:01,945 INFO L225 Difference]: With dead ends: 226 [2024-11-28 05:24:01,945 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 05:24:01,945 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 05:24:01,946 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:01,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:24:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 05:24:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2024-11-28 05:24:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.180094786729858) internal successors, (249), 214 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 05:24:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 249 transitions. [2024-11-28 05:24:01,962 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 249 transitions. Word has length 81 [2024-11-28 05:24:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:01,963 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 249 transitions. [2024-11-28 05:24:01,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states 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 05:24:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 249 transitions. [2024-11-28 05:24:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-28 05:24:01,964 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:01,964 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:01,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 05:24:01,965 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:01,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1405200924, now seen corresponding path program 1 times [2024-11-28 05:24:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518932051] [2024-11-28 05:24:01,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 210 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 05:24:02,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:02,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518932051] [2024-11-28 05:24:02,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518932051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:02,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617866142] [2024-11-28 05:24:02,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:24:02,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:02,479 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:02,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:24:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:02,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:24:02,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:24:02,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 181 proven. 88 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:24:03,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617866142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:03,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:03,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 18 [2024-11-28 05:24:03,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743558128] [2024-11-28 05:24:03,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:03,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:24:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:03,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:24:03,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:24:03,010 INFO L87 Difference]: Start difference. First operand 215 states and 249 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 05:24:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:03,671 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2024-11-28 05:24:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:24:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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) Word has length 81 [2024-11-28 05:24:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:03,673 INFO L225 Difference]: With dead ends: 170 [2024-11-28 05:24:03,673 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 05:24:03,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 151 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:24:03,676 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:03,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:24:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 05:24:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2024-11-28 05:24:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.191358024691358) internal successors, (193), 165 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2024-11-28 05:24:03,682 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 81 [2024-11-28 05:24:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:03,683 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2024-11-28 05:24:03,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 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 05:24:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2024-11-28 05:24:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 05:24:03,684 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:03,684 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1] [2024-11-28 05:24:03,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:24:03,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 05:24:03,893 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:03,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash 60659530, now seen corresponding path program 4 times [2024-11-28 05:24:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063355601] [2024-11-28 05:24:03,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:03,927 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:03,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 48 proven. 373 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:24:04,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:04,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063355601] [2024-11-28 05:24:04,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063355601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:04,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808387831] [2024-11-28 05:24:04,546 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:04,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:04,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:04,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:24:04,697 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:04,697 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:04,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:24:04,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 65 proven. 356 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:24:05,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 65 proven. 356 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:24:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808387831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:05,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:05,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 29 [2024-11-28 05:24:05,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48429581] [2024-11-28 05:24:05,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:05,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:24:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:05,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:24:05,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:24:05,552 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:06,409 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2024-11-28 05:24:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 05:24:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-11-28 05:24:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:06,412 INFO L225 Difference]: With dead ends: 155 [2024-11-28 05:24:06,412 INFO L226 Difference]: Without dead ends: 155 [2024-11-28 05:24:06,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:24:06,415 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:06,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 40 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:24:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-28 05:24:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2024-11-28 05:24:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2024-11-28 05:24:06,428 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 83 [2024-11-28 05:24:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:06,428 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2024-11-28 05:24:06,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2024-11-28 05:24:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 05:24:06,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:06,429 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:06,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:06,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 05:24:06,631 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:06,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 267059556, now seen corresponding path program 2 times [2024-11-28 05:24:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:06,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615246732] [2024-11-28 05:24:06,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:06,675 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:06,675 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 226 proven. 123 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-28 05:24:07,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:07,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615246732] [2024-11-28 05:24:07,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615246732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:07,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711228259] [2024-11-28 05:24:07,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:07,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:07,167 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:07,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:24:07,351 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:07,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:07,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:24:07,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 165 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 05:24:07,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 165 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 05:24:07,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711228259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:07,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:07,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 22 [2024-11-28 05:24:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164388746] [2024-11-28 05:24:07,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:07,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 05:24:07,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:07,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 05:24:07,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:24:07,922 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 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 05:24:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:08,846 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2024-11-28 05:24:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:24:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-28 05:24:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:08,848 INFO L225 Difference]: With dead ends: 151 [2024-11-28 05:24:08,848 INFO L226 Difference]: Without dead ends: 151 [2024-11-28 05:24:08,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 163 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:24:08,850 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:08,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:24:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-28 05:24:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2024-11-28 05:24:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.1142857142857143) internal successors, (156), 143 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 05:24:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2024-11-28 05:24:08,856 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 89 [2024-11-28 05:24:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:08,856 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2024-11-28 05:24:08,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.318181818181818) internal successors, (117), 22 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 05:24:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2024-11-28 05:24:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 05:24:08,857 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:08,858 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:24:08,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:09,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 05:24:09,059 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:09,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1441575316, now seen corresponding path program 3 times [2024-11-28 05:24:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-28 05:24:09,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:09,099 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:09,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 05:24:09,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-28 05:24:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204166223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429016096] [2024-11-28 05:24:09,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:09,223 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:09,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:24:09,359 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:09,359 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:09,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:24:09,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:09,383 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 05:24:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:24:09,390 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 05:24:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 05:24:09,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2024-11-28 05:24:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429016096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:10,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-28 05:24:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613195228] [2024-11-28 05:24:10,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:10,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:24:10,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:10,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:24:10,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:24:10,353 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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 05:24:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:10,486 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2024-11-28 05:24:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:24:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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) Word has length 93 [2024-11-28 05:24:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:10,487 INFO L225 Difference]: With dead ends: 153 [2024-11-28 05:24:10,488 INFO L226 Difference]: Without dead ends: 153 [2024-11-28 05:24:10,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:24:10,488 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:10,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 46 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:24:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-28 05:24:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-28 05:24:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 152 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 05:24:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2024-11-28 05:24:10,494 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 93 [2024-11-28 05:24:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:10,495 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2024-11-28 05:24:10,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.25) internal successors, (42), 9 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 05:24:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2024-11-28 05:24:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-28 05:24:10,496 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:10,496 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-28 05:24:10,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:24:10,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 05:24:10,697 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:10,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1199408120, now seen corresponding path program 4 times [2024-11-28 05:24:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26563841] [2024-11-28 05:24:10,702 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:10,791 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:10,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 6 proven. 330 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-28 05:24:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26563841] [2024-11-28 05:24:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26563841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673201418] [2024-11-28 05:24:11,466 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:11,471 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:11,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:24:11,681 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:11,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:11,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 05:24:11,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:12,084 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 19 treesize of output 1 [2024-11-28 05:24:12,286 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 05:24:12,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-28 05:24:12,488 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-28 05:24:12,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2024-11-28 05:24:12,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-28 05:24:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 127 proven. 285 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-28 05:24:12,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:13,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-28 05:24:13,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 05:24:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 38 proven. 374 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-28 05:24:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673201418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:13,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 21] total 39 [2024-11-28 05:24:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110382361] [2024-11-28 05:24:13,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:13,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 05:24:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:13,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 05:24:13,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:24:13,663 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 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 05:24:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:15,967 INFO L93 Difference]: Finished difference Result 196 states and 219 transitions. [2024-11-28 05:24:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 05:24:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 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) Word has length 102 [2024-11-28 05:24:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:15,969 INFO L225 Difference]: With dead ends: 196 [2024-11-28 05:24:15,969 INFO L226 Difference]: Without dead ends: 189 [2024-11-28 05:24:15,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=594, Invalid=4236, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:24:15,971 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 161 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:15,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 05:24:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-28 05:24:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 186. [2024-11-28 05:24:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 183 states have (on average 1.1475409836065573) internal successors, (210), 185 states have internal predecessors, (210), 0 states have call successors, (0), 0 states 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 05:24:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2024-11-28 05:24:15,977 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 102 [2024-11-28 05:24:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:15,977 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2024-11-28 05:24:15,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 39 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 05:24:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2024-11-28 05:24:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-28 05:24:15,979 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:15,979 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1] [2024-11-28 05:24:15,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:24:16,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:24:16,179 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:16,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:16,180 INFO L85 PathProgramCache]: Analyzing trace with hash -919943069, now seen corresponding path program 5 times [2024-11-28 05:24:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:16,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637989663] [2024-11-28 05:24:16,180 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:24:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:16,306 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 05:24:16,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 332 proven. 50 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-28 05:24:16,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637989663] [2024-11-28 05:24:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637989663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117875703] [2024-11-28 05:24:16,482 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:24:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:16,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:16,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:24:16,696 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 05:24:16,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:16,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:24:16,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 332 proven. 50 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-28 05:24:16,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 332 proven. 50 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-28 05:24:16,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117875703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:16,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:16,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 05:24:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293091699] [2024-11-28 05:24:16,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:16,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:24:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:16,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:24:16,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:24:16,969 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 05:24:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:17,493 INFO L93 Difference]: Finished difference Result 214 states and 234 transitions. [2024-11-28 05:24:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:24:17,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 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 110 [2024-11-28 05:24:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:17,494 INFO L225 Difference]: With dead ends: 214 [2024-11-28 05:24:17,494 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 05:24:17,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:24:17,495 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:17,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 45 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:24:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 05:24:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 200. [2024-11-28 05:24:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 197 states have (on average 1.116751269035533) internal successors, (220), 199 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 05:24:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 220 transitions. [2024-11-28 05:24:17,502 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 220 transitions. Word has length 110 [2024-11-28 05:24:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:17,502 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 220 transitions. [2024-11-28 05:24:17,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 05:24:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 220 transitions. [2024-11-28 05:24:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-28 05:24:17,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:17,504 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1] [2024-11-28 05:24:17,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:24:17,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 05:24:17,705 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:17,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2146633870, now seen corresponding path program 2 times [2024-11-28 05:24:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790698315] [2024-11-28 05:24:17,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:17,765 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:17,765 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 201 proven. 1031 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-28 05:24:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790698315] [2024-11-28 05:24:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790698315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950241277] [2024-11-28 05:24:18,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:18,496 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:18,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:24:18,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:18,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:18,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:24:18,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 446 proven. 754 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-28 05:24:19,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 446 proven. 754 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-28 05:24:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950241277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:19,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:19,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 29 [2024-11-28 05:24:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072819149] [2024-11-28 05:24:19,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:19,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:24:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:19,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:24:19,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:24:19,376 INFO L87 Difference]: Start difference. First operand 200 states and 220 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 05:24:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:20,017 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2024-11-28 05:24:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 05:24:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 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 05:24:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:20,019 INFO L225 Difference]: With dead ends: 176 [2024-11-28 05:24:20,019 INFO L226 Difference]: Without dead ends: 176 [2024-11-28 05:24:20,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 244 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 05:24:20,021 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:20,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:24:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-28 05:24:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2024-11-28 05:24:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 174 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 05:24:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 185 transitions. [2024-11-28 05:24:20,026 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 185 transitions. Word has length 131 [2024-11-28 05:24:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:20,027 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 185 transitions. [2024-11-28 05:24:20,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 05:24:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 185 transitions. [2024-11-28 05:24:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 05:24:20,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:20,028 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1] [2024-11-28 05:24:20,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:24:20,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:24:20,233 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:20,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash 686062548, now seen corresponding path program 3 times [2024-11-28 05:24:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637801261] [2024-11-28 05:24:20,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:20,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:20,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 5 proven. 454 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2024-11-28 05:24:20,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637801261] [2024-11-28 05:24:20,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637801261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:20,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626328341] [2024-11-28 05:24:20,778 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:20,781 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:20,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:24:20,918 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:20,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:20,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:24:20,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:20,938 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 05:24:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:24:20,947 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 05:24:20,955 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 05:24:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 14 proven. 453 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2024-11-28 05:24:22,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 467 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2024-11-28 05:24:23,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626328341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:23,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:23,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-28 05:24:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396138623] [2024-11-28 05:24:23,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:23,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:24:23,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:23,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:24:23,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:24:23,998 INFO L87 Difference]: Start difference. First operand 175 states and 185 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 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 05:24:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:25,121 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2024-11-28 05:24:25,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:24:25,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2024-11-28 05:24:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:25,122 INFO L225 Difference]: With dead ends: 174 [2024-11-28 05:24:25,122 INFO L226 Difference]: Without dead ends: 174 [2024-11-28 05:24:25,123 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=425, Invalid=1057, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:24:25,124 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 143 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:25,124 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 27 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:24:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-28 05:24:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2024-11-28 05:24:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 169 states have (on average 1.0710059171597632) internal successors, (181), 170 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 05:24:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2024-11-28 05:24:25,129 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 139 [2024-11-28 05:24:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:25,130 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2024-11-28 05:24:25,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 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 05:24:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2024-11-28 05:24:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-28 05:24:25,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:25,132 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1] [2024-11-28 05:24:25,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:25,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:24:25,336 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:25,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1651131303, now seen corresponding path program 3 times [2024-11-28 05:24:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634337250] [2024-11-28 05:24:25,337 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:25,377 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:25,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 911 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2024-11-28 05:24:25,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634337250] [2024-11-28 05:24:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634337250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779837119] [2024-11-28 05:24:25,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:25,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:25,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:25,587 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:25,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:24:25,788 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 05:24:25,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:25,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 05:24:25,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:25,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 05:24:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 05:24:25,846 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 11 treesize of output 1 [2024-11-28 05:24:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 39 proven. 872 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2024-11-28 05:24:26,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 911 refuted. 0 times theorem prover too weak. 1030 trivial. 0 not checked. [2024-11-28 05:24:27,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779837119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:27,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:27,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-28 05:24:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285337839] [2024-11-28 05:24:27,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:27,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:24:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:27,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:24:27,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:24:27,895 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:28,028 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2024-11-28 05:24:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 05:24:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2024-11-28 05:24:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:28,030 INFO L225 Difference]: With dead ends: 170 [2024-11-28 05:24:28,030 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 05:24:28,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:24:28,031 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:28,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:24:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 05:24:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-28 05:24:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0591715976331362) internal successors, (179), 169 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 05:24:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 179 transitions. [2024-11-28 05:24:28,037 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 179 transitions. Word has length 158 [2024-11-28 05:24:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:28,037 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 179 transitions. [2024-11-28 05:24:28,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 179 transitions. [2024-11-28 05:24:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-28 05:24:28,039 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:28,039 INFO L218 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1] [2024-11-28 05:24:28,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:28,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:28,244 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:28,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1987759902, now seen corresponding path program 6 times [2024-11-28 05:24:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136829419] [2024-11-28 05:24:28,245 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:24:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:28,413 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 05:24:28,413 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-28 05:24:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:29,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136829419] [2024-11-28 05:24:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136829419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66515427] [2024-11-28 05:24:29,432 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:24:29,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:29,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:29,434 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:29,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:24:29,847 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 05:24:29,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:29,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:24:29,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-28 05:24:30,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-11-28 05:24:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66515427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:32,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:32,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2024-11-28 05:24:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337240062] [2024-11-28 05:24:32,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:32,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 05:24:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:32,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 05:24:32,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 05:24:32,173 INFO L87 Difference]: Start difference. First operand 170 states and 179 transitions. Second operand has 36 states, 35 states have (on average 5.685714285714286) internal successors, (199), 36 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 05:24:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:35,604 INFO L93 Difference]: Finished difference Result 566 states and 631 transitions. [2024-11-28 05:24:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-28 05:24:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.685714285714286) internal successors, (199), 36 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 165 [2024-11-28 05:24:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:35,607 INFO L225 Difference]: With dead ends: 566 [2024-11-28 05:24:35,607 INFO L226 Difference]: Without dead ends: 566 [2024-11-28 05:24:35,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1384, Invalid=6448, Unknown=0, NotChecked=0, Total=7832 [2024-11-28 05:24:35,609 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 238 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:35,610 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 59 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:24:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-11-28 05:24:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 359. [2024-11-28 05:24:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.047486033519553) internal successors, (375), 358 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 05:24:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 375 transitions. [2024-11-28 05:24:35,622 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 375 transitions. Word has length 165 [2024-11-28 05:24:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:35,622 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 375 transitions. [2024-11-28 05:24:35,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.685714285714286) internal successors, (199), 36 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 05:24:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 375 transitions. [2024-11-28 05:24:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2024-11-28 05:24:35,628 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:35,629 INFO L218 NwaCegarLoop]: trace histogram [67, 66, 66, 66, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:24:35,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 05:24:35,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 05:24:35,830 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:35,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1246394213, now seen corresponding path program 7 times [2024-11-28 05:24:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:35,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652985004] [2024-11-28 05:24:35,832 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:24:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 4465 proven. 500 refuted. 0 times theorem prover too weak. 5037 trivial. 0 not checked. [2024-11-28 05:24:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652985004] [2024-11-28 05:24:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652985004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883598559] [2024-11-28 05:24:37,584 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:24:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:37,586 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:37,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:24:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:24:37,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 05:24:37,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 4602 proven. 363 refuted. 0 times theorem prover too weak. 5037 trivial. 0 not checked. [2024-11-28 05:24:38,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 4602 proven. 363 refuted. 0 times theorem prover too weak. 5037 trivial. 0 not checked. [2024-11-28 05:24:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883598559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:38,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:38,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 24 [2024-11-28 05:24:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891699257] [2024-11-28 05:24:38,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:38,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:24:38,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:38,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:24:38,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:24:38,594 INFO L87 Difference]: Start difference. First operand 359 states and 375 transitions. Second operand has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 05:24:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:39,357 INFO L93 Difference]: Finished difference Result 408 states and 422 transitions. [2024-11-28 05:24:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 05:24:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 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 354 [2024-11-28 05:24:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:39,359 INFO L225 Difference]: With dead ends: 408 [2024-11-28 05:24:39,359 INFO L226 Difference]: Without dead ends: 408 [2024-11-28 05:24:39,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 692 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=504, Invalid=1566, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:24:39,361 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:39,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 53 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:24:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-28 05:24:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 387. [2024-11-28 05:24:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.038860103626943) internal successors, (401), 386 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 05:24:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 401 transitions. [2024-11-28 05:24:39,374 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 401 transitions. Word has length 354 [2024-11-28 05:24:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:39,375 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 401 transitions. [2024-11-28 05:24:39,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 05:24:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 401 transitions. [2024-11-28 05:24:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-11-28 05:24:39,383 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:39,383 INFO L218 NwaCegarLoop]: trace histogram [75, 74, 74, 74, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:24:39,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:39,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:39,588 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:39,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1838286181, now seen corresponding path program 8 times [2024-11-28 05:24:39,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:39,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111510561] [2024-11-28 05:24:39,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:39,775 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:39,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12338 backedges. 7294 proven. 261 refuted. 0 times theorem prover too weak. 4783 trivial. 0 not checked. [2024-11-28 05:24:41,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:41,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111510561] [2024-11-28 05:24:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111510561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119385842] [2024-11-28 05:24:41,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:24:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:41,293 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:41,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:24:41,822 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:24:41,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:41,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 05:24:41,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12338 backedges. 6534 proven. 601 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2024-11-28 05:24:42,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12338 backedges. 6534 proven. 601 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2024-11-28 05:24:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119385842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:42,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:42,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 30 [2024-11-28 05:24:42,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689763669] [2024-11-28 05:24:42,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:42,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:24:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:42,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:24:42,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:24:42,730 INFO L87 Difference]: Start difference. First operand 387 states and 401 transitions. Second operand has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 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 05:24:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:44,196 INFO L93 Difference]: Finished difference Result 436 states and 449 transitions. [2024-11-28 05:24:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 05:24:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 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) Word has length 386 [2024-11-28 05:24:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:44,198 INFO L225 Difference]: With dead ends: 436 [2024-11-28 05:24:44,198 INFO L226 Difference]: Without dead ends: 436 [2024-11-28 05:24:44,200 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 749 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=803, Invalid=3357, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 05:24:44,200 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:44,201 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 46 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:24:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-28 05:24:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 415. [2024-11-28 05:24:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.0338164251207729) internal successors, (428), 414 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 428 transitions. [2024-11-28 05:24:44,211 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 428 transitions. Word has length 386 [2024-11-28 05:24:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:44,212 INFO L471 AbstractCegarLoop]: Abstraction has 415 states and 428 transitions. [2024-11-28 05:24:44,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.5) internal successors, (165), 30 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 05:24:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 428 transitions. [2024-11-28 05:24:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2024-11-28 05:24:44,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:44,221 INFO L218 NwaCegarLoop]: trace histogram [82, 81, 81, 81, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:24:44,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 05:24:44,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:44,425 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:44,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash -376832493, now seen corresponding path program 9 times [2024-11-28 05:24:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811736999] [2024-11-28 05:24:44,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:44,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 05:24:44,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14592 backedges. 1997 proven. 3732 refuted. 0 times theorem prover too weak. 8863 trivial. 0 not checked. [2024-11-28 05:24:45,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811736999] [2024-11-28 05:24:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811736999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117977512] [2024-11-28 05:24:45,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:24:45,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:45,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:45,172 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:45,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:24:45,537 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 05:24:45,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:45,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 05:24:45,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14592 backedges. 1954 proven. 3732 refuted. 0 times theorem prover too weak. 8906 trivial. 0 not checked. [2024-11-28 05:24:46,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14592 backedges. 0 proven. 5686 refuted. 0 times theorem prover too weak. 8906 trivial. 0 not checked. [2024-11-28 05:24:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117977512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:48,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:48,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 46 [2024-11-28 05:24:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287872973] [2024-11-28 05:24:48,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:48,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 05:24:48,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:48,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 05:24:48,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 05:24:48,469 INFO L87 Difference]: Start difference. First operand 415 states and 428 transitions. Second operand has 47 states, 46 states have (on average 3.760869565217391) internal successors, (173), 47 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 05:24:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:24:55,389 INFO L93 Difference]: Finished difference Result 1581 states and 1738 transitions. [2024-11-28 05:24:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-28 05:24:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.760869565217391) internal successors, (173), 47 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) Word has length 414 [2024-11-28 05:24:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:24:55,397 INFO L225 Difference]: With dead ends: 1581 [2024-11-28 05:24:55,397 INFO L226 Difference]: Without dead ends: 1581 [2024-11-28 05:24:55,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 798 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3689, Invalid=11073, Unknown=0, NotChecked=0, Total=14762 [2024-11-28 05:24:55,401 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 359 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:24:55,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 26 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:24:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2024-11-28 05:24:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 474. [2024-11-28 05:24:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0676532769556026) internal successors, (505), 473 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:24:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 505 transitions. [2024-11-28 05:24:55,423 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 505 transitions. Word has length 414 [2024-11-28 05:24:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:24:55,424 INFO L471 AbstractCegarLoop]: Abstraction has 474 states and 505 transitions. [2024-11-28 05:24:55,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.760869565217391) internal successors, (173), 47 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 05:24:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 505 transitions. [2024-11-28 05:24:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2024-11-28 05:24:55,428 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:24:55,428 INFO L218 NwaCegarLoop]: trace histogram [93, 92, 92, 92, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:24:55,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:24:55,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:55,630 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:24:55,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:24:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1946961995, now seen corresponding path program 10 times [2024-11-28 05:24:55,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:24:55,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636261881] [2024-11-28 05:24:55,635 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:24:55,792 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:55,793 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18530 backedges. 12101 proven. 886 refuted. 0 times theorem prover too weak. 5543 trivial. 0 not checked. [2024-11-28 05:24:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:24:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636261881] [2024-11-28 05:24:56,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636261881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:24:56,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876127589] [2024-11-28 05:24:56,917 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:24:56,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:24:56,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:24:56,920 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:24:56,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:24:57,449 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:24:57,450 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:24:57,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 05:24:57,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:24:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18530 backedges. 10100 proven. 1062 refuted. 0 times theorem prover too weak. 7368 trivial. 0 not checked. [2024-11-28 05:24:57,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:24:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18530 backedges. 10240 proven. 922 refuted. 0 times theorem prover too weak. 7368 trivial. 0 not checked. [2024-11-28 05:24:58,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876127589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:24:58,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:24:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 38 [2024-11-28 05:24:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090634125] [2024-11-28 05:24:58,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:24:58,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 05:24:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:24:58,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 05:24:58,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:24:58,478 INFO L87 Difference]: Start difference. First operand 474 states and 505 transitions. Second operand has 38 states, 38 states have (on average 5.342105263157895) internal successors, (203), 38 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 05:25:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:25:01,037 INFO L93 Difference]: Finished difference Result 505 states and 530 transitions. [2024-11-28 05:25:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 05:25:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.342105263157895) internal successors, (203), 38 states have internal predecessors, (203), 0 states have call successors, (0), 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 458 [2024-11-28 05:25:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:25:01,039 INFO L225 Difference]: With dead ends: 505 [2024-11-28 05:25:01,039 INFO L226 Difference]: Without dead ends: 505 [2024-11-28 05:25:01,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 885 SyntacticMatches, 14 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2353 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1718, Invalid=6472, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 05:25:01,041 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:25:01,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 57 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 05:25:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-11-28 05:25:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 502. [2024-11-28 05:25:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.0518962075848304) internal successors, (527), 501 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 05:25:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 527 transitions. [2024-11-28 05:25:01,053 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 527 transitions. Word has length 458 [2024-11-28 05:25:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:25:01,054 INFO L471 AbstractCegarLoop]: Abstraction has 502 states and 527 transitions. [2024-11-28 05:25:01,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.342105263157895) internal successors, (203), 38 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 05:25:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 527 transitions. [2024-11-28 05:25:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2024-11-28 05:25:01,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:25:01,058 INFO L218 NwaCegarLoop]: trace histogram [100, 99, 99, 99, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:25:01,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:01,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:01,259 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:25:01,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash -540053421, now seen corresponding path program 11 times [2024-11-28 05:25:01,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:01,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462855521] [2024-11-28 05:25:01,260 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:25:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:01,980 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 05:25:01,981 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21288 backedges. 13561 proven. 529 refuted. 0 times theorem prover too weak. 7198 trivial. 0 not checked. [2024-11-28 05:25:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:03,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462855521] [2024-11-28 05:25:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462855521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:03,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621015066] [2024-11-28 05:25:03,244 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:25:03,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:03,247 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:25:05,051 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 05:25:05,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:05,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:25:05,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21288 backedges. 14196 proven. 2144 refuted. 0 times theorem prover too weak. 4948 trivial. 0 not checked. [2024-11-28 05:25:05,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21288 backedges. 14684 proven. 1656 refuted. 0 times theorem prover too weak. 4948 trivial. 0 not checked. [2024-11-28 05:25:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621015066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:06,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2024-11-28 05:25:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875098751] [2024-11-28 05:25:06,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:06,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 05:25:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:06,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 05:25:06,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:25:06,584 INFO L87 Difference]: Start difference. First operand 502 states and 527 transitions. Second operand has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 05:25:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:25:09,763 INFO L93 Difference]: Finished difference Result 682 states and 710 transitions. [2024-11-28 05:25:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 05:25:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 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 486 [2024-11-28 05:25:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:25:09,766 INFO L225 Difference]: With dead ends: 682 [2024-11-28 05:25:09,766 INFO L226 Difference]: Without dead ends: 682 [2024-11-28 05:25:09,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 933 SyntacticMatches, 16 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2245, Invalid=8261, Unknown=0, NotChecked=0, Total=10506 [2024-11-28 05:25:09,769 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:25:09,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 93 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 05:25:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-11-28 05:25:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 585. [2024-11-28 05:25:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.0462328767123288) internal successors, (611), 584 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 05:25:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 611 transitions. [2024-11-28 05:25:09,782 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 611 transitions. Word has length 486 [2024-11-28 05:25:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:25:09,783 INFO L471 AbstractCegarLoop]: Abstraction has 585 states and 611 transitions. [2024-11-28 05:25:09,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 05:25:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 611 transitions. [2024-11-28 05:25:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2024-11-28 05:25:09,787 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:25:09,787 INFO L218 NwaCegarLoop]: trace histogram [103, 102, 102, 102, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:25:09,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:09,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 05:25:09,988 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:25:09,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 489006427, now seen corresponding path program 12 times [2024-11-28 05:25:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153452912] [2024-11-28 05:25:09,989 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:25:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:10,299 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-11-28 05:25:10,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22530 backedges. 0 proven. 4944 refuted. 0 times theorem prover too weak. 17586 trivial. 0 not checked. [2024-11-28 05:25:11,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:11,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153452912] [2024-11-28 05:25:11,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153452912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:11,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676185900] [2024-11-28 05:25:11,047 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:25:11,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:11,049 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:11,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:25:11,862 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-11-28 05:25:11,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:11,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:25:11,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22530 backedges. 4656 proven. 288 refuted. 0 times theorem prover too weak. 17586 trivial. 0 not checked. [2024-11-28 05:25:12,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22530 backedges. 4656 proven. 288 refuted. 0 times theorem prover too weak. 17586 trivial. 0 not checked. [2024-11-28 05:25:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676185900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:12,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2024-11-28 05:25:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555062528] [2024-11-28 05:25:12,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:12,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 05:25:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:12,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 05:25:12,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1486, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:25:12,607 INFO L87 Difference]: Start difference. First operand 585 states and 611 transitions. Second operand has 44 states, 43 states have (on average 4.1395348837209305) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:25:19,964 INFO L93 Difference]: Finished difference Result 1244 states and 1386 transitions. [2024-11-28 05:25:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:25:19,965 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.1395348837209305) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 498 [2024-11-28 05:25:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:25:19,969 INFO L225 Difference]: With dead ends: 1244 [2024-11-28 05:25:19,969 INFO L226 Difference]: Without dead ends: 1244 [2024-11-28 05:25:19,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1037 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1116, Invalid=3714, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:25:19,970 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 201 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:25:19,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 108 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:25:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2024-11-28 05:25:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 626. [2024-11-28 05:25:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.0544) internal successors, (659), 625 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 659 transitions. [2024-11-28 05:25:19,984 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 659 transitions. Word has length 498 [2024-11-28 05:25:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:25:19,985 INFO L471 AbstractCegarLoop]: Abstraction has 626 states and 659 transitions. [2024-11-28 05:25:19,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.1395348837209305) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:25:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 659 transitions. [2024-11-28 05:25:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2024-11-28 05:25:19,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:25:19,989 INFO L218 NwaCegarLoop]: trace histogram [117, 116, 116, 116, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:25:20,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 05:25:20,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 05:25:20,190 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:25:20,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1926996789, now seen corresponding path program 13 times [2024-11-28 05:25:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:20,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487206037] [2024-11-28 05:25:20,191 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:25:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28802 backedges. 19341 proven. 1902 refuted. 0 times theorem prover too weak. 7559 trivial. 0 not checked. [2024-11-28 05:25:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:22,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487206037] [2024-11-28 05:25:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487206037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935006176] [2024-11-28 05:25:22,709 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:25:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:22,711 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:22,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:25:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:25:23,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:25:23,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28802 backedges. 20052 proven. 2503 refuted. 0 times theorem prover too weak. 6247 trivial. 0 not checked. [2024-11-28 05:25:24,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 28802 backedges. 20052 proven. 2503 refuted. 0 times theorem prover too weak. 6247 trivial. 0 not checked. [2024-11-28 05:25:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935006176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:24,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:24,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 55 [2024-11-28 05:25:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114467922] [2024-11-28 05:25:24,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:24,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 05:25:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:24,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 05:25:24,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 05:25:24,870 INFO L87 Difference]: Start difference. First operand 626 states and 659 transitions. Second operand has 55 states, 55 states have (on average 5.3090909090909095) internal successors, (292), 55 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 05:25:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:25:28,618 INFO L93 Difference]: Finished difference Result 815 states and 849 transitions. [2024-11-28 05:25:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-28 05:25:28,619 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.3090909090909095) internal successors, (292), 55 states have internal predecessors, (292), 0 states have call successors, (0), 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 554 [2024-11-28 05:25:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:25:28,633 INFO L225 Difference]: With dead ends: 815 [2024-11-28 05:25:28,634 INFO L226 Difference]: Without dead ends: 815 [2024-11-28 05:25:28,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 1070 SyntacticMatches, 10 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3107, Invalid=13923, Unknown=0, NotChecked=0, Total=17030 [2024-11-28 05:25:28,635 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:25:28,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 78 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 05:25:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2024-11-28 05:25:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 695. [2024-11-28 05:25:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.0489913544668588) internal successors, (728), 694 states have internal predecessors, (728), 0 states have call successors, (0), 0 states 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 05:25:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 728 transitions. [2024-11-28 05:25:28,647 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 728 transitions. Word has length 554 [2024-11-28 05:25:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:25:28,647 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 728 transitions. [2024-11-28 05:25:28,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.3090909090909095) internal successors, (292), 55 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 05:25:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 728 transitions. [2024-11-28 05:25:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2024-11-28 05:25:28,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:25:28,652 INFO L218 NwaCegarLoop]: trace histogram [119, 118, 118, 118, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:25:28,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:25:28,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 05:25:28,852 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:25:28,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -976857269, now seen corresponding path program 14 times [2024-11-28 05:25:28,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266097461] [2024-11-28 05:25:28,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:29,015 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:29,015 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29762 backedges. 19927 proven. 1679 refuted. 0 times theorem prover too weak. 8156 trivial. 0 not checked. [2024-11-28 05:25:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266097461] [2024-11-28 05:25:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266097461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28702795] [2024-11-28 05:25:31,162 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:25:31,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:31,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:31,165 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:31,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:25:31,759 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:25:31,759 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:31,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:25:31,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 29762 backedges. 21964 proven. 3276 refuted. 0 times theorem prover too weak. 4522 trivial. 0 not checked. [2024-11-28 05:25:32,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 29762 backedges. 21964 proven. 3276 refuted. 0 times theorem prover too weak. 4522 trivial. 0 not checked. [2024-11-28 05:25:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28702795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:33,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:33,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 60 [2024-11-28 05:25:33,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566862804] [2024-11-28 05:25:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:33,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-28 05:25:33,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:33,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-28 05:25:33,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 05:25:33,694 INFO L87 Difference]: Start difference. First operand 695 states and 728 transitions. Second operand has 60 states, 60 states have (on average 5.283333333333333) internal successors, (317), 60 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 05:25:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:25:39,294 INFO L93 Difference]: Finished difference Result 1258 states and 1300 transitions. [2024-11-28 05:25:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-28 05:25:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.283333333333333) internal successors, (317), 60 states have internal predecessors, (317), 0 states have call successors, (0), 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 562 [2024-11-28 05:25:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:25:39,298 INFO L225 Difference]: With dead ends: 1258 [2024-11-28 05:25:39,298 INFO L226 Difference]: Without dead ends: 1258 [2024-11-28 05:25:39,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1239 GetRequests, 1081 SyntacticMatches, 11 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5633 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=18132, Unknown=0, NotChecked=0, Total=22052 [2024-11-28 05:25:39,301 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 5336 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:25:39,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 92 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 5336 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 05:25:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-11-28 05:25:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 899. [2024-11-28 05:25:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.0400890868596881) internal successors, (934), 898 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 05:25:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 934 transitions. [2024-11-28 05:25:39,316 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 934 transitions. Word has length 562 [2024-11-28 05:25:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:25:39,317 INFO L471 AbstractCegarLoop]: Abstraction has 899 states and 934 transitions. [2024-11-28 05:25:39,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.283333333333333) internal successors, (317), 60 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 05:25:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 934 transitions. [2024-11-28 05:25:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2024-11-28 05:25:39,321 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:25:39,321 INFO L218 NwaCegarLoop]: trace histogram [120, 119, 119, 119, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:25:39,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 05:25:39,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 05:25:39,526 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:25:39,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:25:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1826675757, now seen corresponding path program 15 times [2024-11-28 05:25:39,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:25:39,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964840286] [2024-11-28 05:25:39,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:25:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:25:39,764 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 05:25:39,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30248 backedges. 7933 proven. 11338 refuted. 0 times theorem prover too weak. 10977 trivial. 0 not checked. [2024-11-28 05:25:40,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:25:40,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964840286] [2024-11-28 05:25:40,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964840286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:25:40,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732367178] [2024-11-28 05:25:40,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:25:40,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:25:40,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:25:40,802 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:25:40,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:25:42,245 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 05:25:42,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:25:42,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 05:25:42,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:25:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30248 backedges. 7834 proven. 11338 refuted. 0 times theorem prover too weak. 11076 trivial. 0 not checked. [2024-11-28 05:25:43,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:25:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30248 backedges. 0 proven. 19835 refuted. 0 times theorem prover too weak. 10413 trivial. 0 not checked. [2024-11-28 05:25:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732367178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:25:46,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:25:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 30] total 68 [2024-11-28 05:25:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80043894] [2024-11-28 05:25:46,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:25:46,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-28 05:25:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:25:46,523 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-28 05:25:46,523 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1051, Invalid=3641, Unknown=0, NotChecked=0, Total=4692 [2024-11-28 05:25:46,524 INFO L87 Difference]: Start difference. First operand 899 states and 934 transitions. Second operand has 69 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 69 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 05:26:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:26:24,626 INFO L93 Difference]: Finished difference Result 3505 states and 3810 transitions. [2024-11-28 05:26:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2024-11-28 05:26:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 69 states have internal predecessors, (269), 0 states have call successors, (0), 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 566 [2024-11-28 05:26:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:26:24,634 INFO L225 Difference]: With dead ends: 3505 [2024-11-28 05:26:24,634 INFO L226 Difference]: Without dead ends: 3505 [2024-11-28 05:26:24,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1085 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28086 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=20900, Invalid=52270, Unknown=0, NotChecked=0, Total=73170 [2024-11-28 05:26:24,638 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 1011 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:26:24,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 40 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:26:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2024-11-28 05:26:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 1056. [2024-11-28 05:26:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.0635071090047394) internal successors, (1122), 1055 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states 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 05:26:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1122 transitions. [2024-11-28 05:26:24,668 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1122 transitions. Word has length 566 [2024-11-28 05:26:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:26:24,669 INFO L471 AbstractCegarLoop]: Abstraction has 1056 states and 1122 transitions. [2024-11-28 05:26:24,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.9558823529411766) internal successors, (269), 69 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 05:26:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1122 transitions. [2024-11-28 05:26:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2024-11-28 05:26:24,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:26:24,674 INFO L218 NwaCegarLoop]: trace histogram [153, 152, 152, 152, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1] [2024-11-28 05:26:24,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 05:26:24,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 05:26:24,875 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:26:24,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1400249947, now seen corresponding path program 16 times [2024-11-28 05:26:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:24,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476250220] [2024-11-28 05:26:24,876 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:24,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:25,042 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:25,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48530 backedges. 16525 proven. 30868 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2024-11-28 05:26:39,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476250220] [2024-11-28 05:26:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476250220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059166960] [2024-11-28 05:26:39,182 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:26:39,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:39,187 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:39,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:26:39,800 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:26:39,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:39,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 05:26:39,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48530 backedges. 20563 proven. 3772 refuted. 0 times theorem prover too weak. 24195 trivial. 0 not checked. [2024-11-28 05:26:41,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48530 backedges. 20563 proven. 3772 refuted. 0 times theorem prover too weak. 24195 trivial. 0 not checked. [2024-11-28 05:26:43,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059166960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:43,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:26:43,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 23, 23] total 168 [2024-11-28 05:26:43,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081204241] [2024-11-28 05:26:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:43,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2024-11-28 05:26:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:43,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2024-11-28 05:26:43,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2157, Invalid=25899, Unknown=0, NotChecked=0, Total=28056 [2024-11-28 05:26:43,107 INFO L87 Difference]: Start difference. First operand 1056 states and 1122 transitions. Second operand has 168 states, 168 states have (on average 4.178571428571429) internal successors, (702), 168 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 05:26:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:26:47,486 INFO L93 Difference]: Finished difference Result 903 states and 960 transitions. [2024-11-28 05:26:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-28 05:26:47,486 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 4.178571428571429) internal successors, (702), 168 states have internal predecessors, (702), 0 states have call successors, (0), 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 698 [2024-11-28 05:26:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:26:47,488 INFO L225 Difference]: With dead ends: 903 [2024-11-28 05:26:47,488 INFO L226 Difference]: Without dead ends: 903 [2024-11-28 05:26:47,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1617 GetRequests, 1365 SyntacticMatches, 9 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22768 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=7385, Invalid=52395, Unknown=0, NotChecked=0, Total=59780 [2024-11-28 05:26:47,492 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 359 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:26:47,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 59 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 05:26:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2024-11-28 05:26:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2024-11-28 05:26:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.06430155210643) internal successors, (960), 902 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 05:26:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 960 transitions. [2024-11-28 05:26:47,504 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 960 transitions. Word has length 698 [2024-11-28 05:26:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:26:47,504 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 960 transitions. [2024-11-28 05:26:47,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 4.178571428571429) internal successors, (702), 168 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 05:26:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 960 transitions. [2024-11-28 05:26:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2024-11-28 05:26:47,510 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:26:47,510 INFO L218 NwaCegarLoop]: trace histogram [162, 161, 161, 161, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1] [2024-11-28 05:26:47,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-28 05:26:47,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:47,711 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:26:47,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash -277460446, now seen corresponding path program 17 times [2024-11-28 05:26:47,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:47,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357198775] [2024-11-28 05:26:47,712 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:47,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:48,915 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 05:26:48,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:26:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 54520 backedges. 26627 proven. 4817 refuted. 0 times theorem prover too weak. 23076 trivial. 0 not checked. [2024-11-28 05:26:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357198775] [2024-11-28 05:26:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357198775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435518088] [2024-11-28 05:26:50,100 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:26:50,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:50,102 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:50,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 05:27:00,055 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-11-28 05:27:00,055 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:00,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:27:00,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54520 backedges. 25938 proven. 5531 refuted. 0 times theorem prover too weak. 23051 trivial. 0 not checked. [2024-11-28 05:27:00,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 54520 backedges. 25938 proven. 5531 refuted. 0 times theorem prover too weak. 23051 trivial. 0 not checked. [2024-11-28 05:27:01,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435518088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:01,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:27:01,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-11-28 05:27:01,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571589371] [2024-11-28 05:27:01,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:01,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-28 05:27:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:27:01,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-28 05:27:01,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 05:27:01,541 INFO L87 Difference]: Start difference. First operand 903 states and 960 transitions. Second operand has 53 states, 53 states have (on average 5.169811320754717) internal successors, (274), 53 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 05:27:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:27:04,373 INFO L93 Difference]: Finished difference Result 899 states and 950 transitions. [2024-11-28 05:27:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-28 05:27:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.169811320754717) internal successors, (274), 53 states have internal predecessors, (274), 0 states have call successors, (0), 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 741 [2024-11-28 05:27:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:27:04,375 INFO L225 Difference]: With dead ends: 899 [2024-11-28 05:27:04,375 INFO L226 Difference]: Without dead ends: 899 [2024-11-28 05:27:04,376 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1612 GetRequests, 1439 SyntacticMatches, 17 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9089 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4451, Invalid=20355, Unknown=0, NotChecked=0, Total=24806 [2024-11-28 05:27:04,376 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 121 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:27:04,377 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 48 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:27:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-11-28 05:27:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 895. [2024-11-28 05:27:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.058165548098434) internal successors, (946), 894 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 05:27:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 946 transitions. [2024-11-28 05:27:04,386 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 946 transitions. Word has length 741 [2024-11-28 05:27:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:27:04,387 INFO L471 AbstractCegarLoop]: Abstraction has 895 states and 946 transitions. [2024-11-28 05:27:04,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.169811320754717) internal successors, (274), 53 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 05:27:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 946 transitions. [2024-11-28 05:27:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2024-11-28 05:27:04,394 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:27:04,394 INFO L218 NwaCegarLoop]: trace histogram [195, 194, 194, 194, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1] [2024-11-28 05:27:04,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 05:27:04,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:04,595 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:27:04,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 653585835, now seen corresponding path program 18 times [2024-11-28 05:27:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:27:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265224452] [2024-11-28 05:27:04,596 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:27:04,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:27:06,106 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 05:27:06,106 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 79264 backedges. 20424 proven. 50554 refuted. 0 times theorem prover too weak. 8286 trivial. 0 not checked. [2024-11-28 05:27:08,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:27:08,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265224452] [2024-11-28 05:27:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265224452] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:27:08,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488097678] [2024-11-28 05:27:08,463 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:27:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:08,465 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:08,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 05:27:16,473 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-11-28 05:27:16,473 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:16,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 05:27:16,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 79264 backedges. 0 proven. 73141 refuted. 0 times theorem prover too weak. 6123 trivial. 0 not checked. [2024-11-28 05:27:19,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79264 backedges. 0 proven. 73141 refuted. 0 times theorem prover too weak. 6123 trivial. 0 not checked. [2024-11-28 05:27:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488097678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:25,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:27:25,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 22] total 70 [2024-11-28 05:27:25,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205701033] [2024-11-28 05:27:25,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:25,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-28 05:27:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:27:25,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-28 05:27:25,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=4113, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 05:27:25,221 INFO L87 Difference]: Start difference. First operand 895 states and 946 transitions. Second operand has 71 states, 70 states have (on average 7.585714285714285) internal successors, (531), 71 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 05:28:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:28:25,345 INFO L93 Difference]: Finished difference Result 9625 states and 10510 transitions. [2024-11-28 05:28:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 508 states. [2024-11-28 05:28:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 7.585714285714285) internal successors, (531), 71 states have internal predecessors, (531), 0 states have call successors, (0), 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 894 [2024-11-28 05:28:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:28:25,356 INFO L225 Difference]: With dead ends: 9625 [2024-11-28 05:28:25,356 INFO L226 Difference]: Without dead ends: 9625 [2024-11-28 05:28:25,363 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2309 GetRequests, 1745 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136980 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=62628, Invalid=257162, Unknown=0, NotChecked=0, Total=319790 [2024-11-28 05:28:25,364 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 2224 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 6035 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2224 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 6330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 6035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:28:25,364 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2224 Valid, 702 Invalid, 6330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 6035 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 05:28:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9625 states. [2024-11-28 05:28:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9625 to 1720. [2024-11-28 05:28:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 1.038976148923793) internal successors, (1786), 1719 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 05:28:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 1786 transitions. [2024-11-28 05:28:25,412 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 1786 transitions. Word has length 894 [2024-11-28 05:28:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:28:25,413 INFO L471 AbstractCegarLoop]: Abstraction has 1720 states and 1786 transitions. [2024-11-28 05:28:25,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 7.585714285714285) internal successors, (531), 71 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 05:28:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 1786 transitions. [2024-11-28 05:28:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2024-11-28 05:28:25,437 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:28:25,438 INFO L218 NwaCegarLoop]: trace histogram [375, 374, 374, 374, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:28:25,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 05:28:25,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:28:25,638 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:28:25,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:28:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1244335094, now seen corresponding path program 19 times [2024-11-28 05:28:25,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:28:25,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124565440] [2024-11-28 05:28:25,640 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:28:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:28:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:28:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 294694 backedges. 125604 proven. 963 refuted. 0 times theorem prover too weak. 168127 trivial. 0 not checked. [2024-11-28 05:28:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:28:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124565440] [2024-11-28 05:28:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124565440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:28:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521531816] [2024-11-28 05:28:31,776 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:28:31,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:28:31,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:28:31,778 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:28:31,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 05:28:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:28:33,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 5901 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 05:28:33,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:28:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 294694 backedges. 120086 proven. 4192 refuted. 0 times theorem prover too weak. 170416 trivial. 0 not checked. [2024-11-28 05:28:34,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:28:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 294694 backedges. 120086 proven. 4192 refuted. 0 times theorem prover too weak. 170416 trivial. 0 not checked. [2024-11-28 05:28:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521531816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:28:35,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:28:35,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 54 [2024-11-28 05:28:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740553874] [2024-11-28 05:28:35,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:28:35,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-28 05:28:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:28:35,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-28 05:28:35,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 05:28:35,115 INFO L87 Difference]: Start difference. First operand 1720 states and 1786 transitions. Second operand has 54 states, 54 states have (on average 5.611111111111111) internal successors, (303), 54 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 05:28:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:28:40,506 INFO L93 Difference]: Finished difference Result 1834 states and 1894 transitions. [2024-11-28 05:28:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-28 05:28:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.611111111111111) internal successors, (303), 54 states have internal predecessors, (303), 0 states have call successors, (0), 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 1719 [2024-11-28 05:28:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:28:40,510 INFO L225 Difference]: With dead ends: 1834 [2024-11-28 05:28:40,510 INFO L226 Difference]: Without dead ends: 1834 [2024-11-28 05:28:40,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3570 GetRequests, 3391 SyntacticMatches, 23 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7738 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4347, Invalid=20459, Unknown=0, NotChecked=0, Total=24806 [2024-11-28 05:28:40,511 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 5466 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 5480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:28:40,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 89 Invalid, 5480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 05:28:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2024-11-28 05:28:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1780. [2024-11-28 05:28:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.0342889263631254) internal successors, (1840), 1779 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states 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 05:28:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 1840 transitions. [2024-11-28 05:28:40,530 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 1840 transitions. Word has length 1719 [2024-11-28 05:28:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:28:40,530 INFO L471 AbstractCegarLoop]: Abstraction has 1780 states and 1840 transitions. [2024-11-28 05:28:40,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.611111111111111) internal successors, (303), 54 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 05:28:40,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 1840 transitions. [2024-11-28 05:28:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1780 [2024-11-28 05:28:40,553 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:28:40,554 INFO L218 NwaCegarLoop]: trace histogram [390, 389, 389, 389, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:28:40,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 05:28:40,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 05:28:40,755 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:28:40,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:28:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1624247186, now seen corresponding path program 20 times [2024-11-28 05:28:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:28:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222352949] [2024-11-28 05:28:40,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:28:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:28:41,151 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:28:41,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:28:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 318049 backedges. 134032 proven. 1122 refuted. 0 times theorem prover too weak. 182895 trivial. 0 not checked. [2024-11-28 05:28:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:28:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222352949] [2024-11-28 05:28:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222352949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:28:47,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364035631] [2024-11-28 05:28:47,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:28:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:28:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:28:47,418 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:28:47,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 05:28:48,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:28:48,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:28:48,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 6096 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:28:48,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:28:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 318049 backedges. 141303 proven. 5263 refuted. 0 times theorem prover too weak. 171483 trivial. 0 not checked. [2024-11-28 05:28:50,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:28:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 318049 backedges. 141303 proven. 5263 refuted. 0 times theorem prover too weak. 171483 trivial. 0 not checked. [2024-11-28 05:28:51,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364035631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:28:51,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:28:51,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 58 [2024-11-28 05:28:51,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561058860] [2024-11-28 05:28:51,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:28:51,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-28 05:28:51,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:28:51,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-28 05:28:51,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 05:28:51,442 INFO L87 Difference]: Start difference. First operand 1780 states and 1840 transitions. Second operand has 58 states, 58 states have (on average 5.620689655172414) internal successors, (326), 58 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 05:28:57,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:28:57,653 INFO L93 Difference]: Finished difference Result 1899 states and 1956 transitions. [2024-11-28 05:28:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-11-28 05:28:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.620689655172414) internal successors, (326), 58 states have internal predecessors, (326), 0 states have call successors, (0), 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 1779 [2024-11-28 05:28:57,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:28:57,658 INFO L225 Difference]: With dead ends: 1899 [2024-11-28 05:28:57,658 INFO L226 Difference]: Without dead ends: 1899 [2024-11-28 05:28:57,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3707 GetRequests, 3507 SyntacticMatches, 25 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9719 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5423, Invalid=25729, Unknown=0, NotChecked=0, Total=31152 [2024-11-28 05:28:57,661 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 91 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5702 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 5717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:28:57,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 107 Invalid, 5717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5702 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 05:28:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2024-11-28 05:28:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1848. [2024-11-28 05:28:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 1.0314022739577693) internal successors, (1905), 1847 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states 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 05:28:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 1905 transitions. [2024-11-28 05:28:57,677 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 1905 transitions. Word has length 1779 [2024-11-28 05:28:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:28:57,677 INFO L471 AbstractCegarLoop]: Abstraction has 1848 states and 1905 transitions. [2024-11-28 05:28:57,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.620689655172414) internal successors, (326), 58 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 05:28:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 1905 transitions. [2024-11-28 05:28:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1848 [2024-11-28 05:28:57,702 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:28:57,703 INFO L218 NwaCegarLoop]: trace histogram [407, 406, 406, 406, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:28:57,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 05:28:57,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 05:28:57,904 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:28:57,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:28:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2066475510, now seen corresponding path program 21 times [2024-11-28 05:28:57,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:28:57,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642139711] [2024-11-28 05:28:57,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:28:57,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:28:58,791 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-28 05:28:58,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 345606 backedges. 0 proven. 42469 refuted. 0 times theorem prover too weak. 303137 trivial. 0 not checked. [2024-11-28 05:29:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642139711] [2024-11-28 05:29:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642139711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:29:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550920659] [2024-11-28 05:29:00,678 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:29:00,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:00,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:00,680 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:00,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 05:29:06,393 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2024-11-28 05:29:06,393 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:06,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 2207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 05:29:06,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:29:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 345606 backedges. 121738 proven. 13158 refuted. 0 times theorem prover too weak. 210710 trivial. 0 not checked. [2024-11-28 05:29:08,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:29:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 345606 backedges. 121738 proven. 13158 refuted. 0 times theorem prover too weak. 210710 trivial. 0 not checked. [2024-11-28 05:29:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550920659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:29:11,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:29:11,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 48] total 124 [2024-11-28 05:29:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896219818] [2024-11-28 05:29:11,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:29:11,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-28 05:29:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:11,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-28 05:29:11,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=12899, Unknown=0, NotChecked=0, Total=15252 [2024-11-28 05:29:11,648 INFO L87 Difference]: Start difference. First operand 1848 states and 1905 transitions. Second operand has 124 states, 124 states have (on average 4.153225806451613) internal successors, (515), 124 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:29:28,684 INFO L93 Difference]: Finished difference Result 12222 states and 13129 transitions. [2024-11-28 05:29:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2024-11-28 05:29:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.153225806451613) internal successors, (515), 124 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1847 [2024-11-28 05:29:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:29:28,708 INFO L225 Difference]: With dead ends: 12222 [2024-11-28 05:29:28,708 INFO L226 Difference]: Without dead ends: 12222 [2024-11-28 05:29:28,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3955 GetRequests, 3601 SyntacticMatches, 0 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39831 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=23587, Invalid=102793, Unknown=0, NotChecked=0, Total=126380 [2024-11-28 05:29:28,717 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 1309 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:29:28,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 35 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 05:29:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12222 states. [2024-11-28 05:29:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12222 to 10084. [2024-11-28 05:29:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10084 states, 10083 states have (on average 1.0780521670137855) internal successors, (10870), 10083 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states 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 05:29:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 10870 transitions. [2024-11-28 05:29:28,818 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 10870 transitions. Word has length 1847 [2024-11-28 05:29:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:29:28,819 INFO L471 AbstractCegarLoop]: Abstraction has 10084 states and 10870 transitions. [2024-11-28 05:29:28,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.153225806451613) internal successors, (515), 124 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:29:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 10870 transitions. [2024-11-28 05:29:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1948 [2024-11-28 05:29:28,855 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:29:28,855 INFO L218 NwaCegarLoop]: trace histogram [432, 431, 431, 431, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:29:28,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 05:29:29,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 05:29:29,057 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:29:29,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1680556818, now seen corresponding path program 22 times [2024-11-28 05:29:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:29,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895657247] [2024-11-28 05:29:29,058 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:29:29,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:29,552 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:29:29,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 388231 backedges. 205322 proven. 1285 refuted. 0 times theorem prover too weak. 181624 trivial. 0 not checked. [2024-11-28 05:29:34,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895657247] [2024-11-28 05:29:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895657247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:29:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381635982] [2024-11-28 05:29:34,349 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:29:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:34,351 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:34,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 05:29:35,862 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:29:35,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:35,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 6029 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 05:29:35,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:29:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 388231 backedges. 176943 proven. 7040 refuted. 0 times theorem prover too weak. 204248 trivial. 0 not checked. [2024-11-28 05:29:37,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:29:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 388231 backedges. 177482 proven. 6501 refuted. 0 times theorem prover too weak. 204248 trivial. 0 not checked. [2024-11-28 05:29:38,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381635982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:29:38,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:29:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2024-11-28 05:29:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859265838] [2024-11-28 05:29:38,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:29:38,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-28 05:29:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:38,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-28 05:29:38,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=5188, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 05:29:38,844 INFO L87 Difference]: Start difference. First operand 10084 states and 10870 transitions. Second operand has 79 states, 79 states have (on average 5.139240506329114) internal successors, (406), 79 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 05:29:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:29:47,927 INFO L93 Difference]: Finished difference Result 7035 states and 7608 transitions. [2024-11-28 05:29:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-11-28 05:29:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 5.139240506329114) internal successors, (406), 79 states have internal predecessors, (406), 0 states have call successors, (0), 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 1947 [2024-11-28 05:29:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:29:47,942 INFO L225 Difference]: With dead ends: 7035 [2024-11-28 05:29:47,942 INFO L226 Difference]: Without dead ends: 7035 [2024-11-28 05:29:47,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4059 GetRequests, 3834 SyntacticMatches, 14 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11892 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8102, Invalid=37054, Unknown=0, NotChecked=0, Total=45156 [2024-11-28 05:29:47,945 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 6128 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 6152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 6128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:29:47,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 100 Invalid, 6152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 6128 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 05:29:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7035 states. [2024-11-28 05:29:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7035 to 7027. [2024-11-28 05:29:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7027 states, 7026 states have (on average 1.0816965556504412) internal successors, (7600), 7026 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states 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 05:29:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 7600 transitions. [2024-11-28 05:29:48,046 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 7600 transitions. Word has length 1947 [2024-11-28 05:29:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:29:48,047 INFO L471 AbstractCegarLoop]: Abstraction has 7027 states and 7600 transitions. [2024-11-28 05:29:48,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 5.139240506329114) internal successors, (406), 79 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 05:29:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 7600 transitions. [2024-11-28 05:29:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1988 [2024-11-28 05:29:48,113 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:29:48,113 INFO L218 NwaCegarLoop]: trace histogram [442, 441, 441, 441, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:29:48,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 05:29:48,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:48,314 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:29:48,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:48,315 INFO L85 PathProgramCache]: Analyzing trace with hash -648864110, now seen corresponding path program 23 times [2024-11-28 05:29:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:48,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597779564] [2024-11-28 05:29:48,315 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:29:48,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:49,878 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2024-11-28 05:29:49,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 405981 backedges. 195555 proven. 11719 refuted. 0 times theorem prover too weak. 198707 trivial. 0 not checked. [2024-11-28 05:29:53,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:53,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597779564] [2024-11-28 05:29:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597779564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:29:53,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669207580] [2024-11-28 05:29:53,786 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:29:53,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:53,788 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:53,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 05:30:03,070 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2024-11-28 05:30:03,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:30:03,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 2388 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:30:03,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:30:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 405981 backedges. 199796 proven. 9154 refuted. 0 times theorem prover too weak. 197031 trivial. 0 not checked. [2024-11-28 05:30:04,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:30:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 405981 backedges. 201950 proven. 7000 refuted. 0 times theorem prover too weak. 197031 trivial. 0 not checked. [2024-11-28 05:30:05,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669207580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:30:05,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:30:05,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 35, 35] total 82 [2024-11-28 05:30:05,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621401455] [2024-11-28 05:30:05,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:30:05,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-28 05:30:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:30:05,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-28 05:30:05,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=5642, Unknown=0, NotChecked=0, Total=6642 [2024-11-28 05:30:05,971 INFO L87 Difference]: Start difference. First operand 7027 states and 7600 transitions. Second operand has 82 states, 82 states have (on average 4.7317073170731705) internal successors, (388), 82 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 05:30:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:30:14,701 INFO L93 Difference]: Finished difference Result 7027 states and 7541 transitions. [2024-11-28 05:30:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-28 05:30:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.7317073170731705) internal successors, (388), 82 states have internal predecessors, (388), 0 states have call successors, (0), 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 1987 [2024-11-28 05:30:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:30:14,714 INFO L225 Difference]: With dead ends: 7027 [2024-11-28 05:30:14,714 INFO L226 Difference]: Without dead ends: 7027 [2024-11-28 05:30:14,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4169 GetRequests, 3918 SyntacticMatches, 26 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15082 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=9236, Invalid=42066, Unknown=0, NotChecked=0, Total=51302 [2024-11-28 05:30:14,720 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 5795 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 5807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:30:14,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 83 Invalid, 5807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5795 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 05:30:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2024-11-28 05:30:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 7027. [2024-11-28 05:30:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7027 states, 7026 states have (on average 1.0732991744947338) internal successors, (7541), 7026 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states 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 05:30:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 7541 transitions. [2024-11-28 05:30:14,786 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 7541 transitions. Word has length 1987 [2024-11-28 05:30:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:30:14,787 INFO L471 AbstractCegarLoop]: Abstraction has 7027 states and 7541 transitions. [2024-11-28 05:30:14,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.7317073170731705) internal successors, (388), 82 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 05:30:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 7541 transitions. [2024-11-28 05:30:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2040 [2024-11-28 05:30:14,819 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:30:14,820 INFO L218 NwaCegarLoop]: trace histogram [455, 454, 454, 454, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:30:14,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 05:30:15,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 05:30:15,023 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:30:15,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:30:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -229902326, now seen corresponding path program 24 times [2024-11-28 05:30:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:30:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752293842] [2024-11-28 05:30:15,024 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:30:15,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:30:18,807 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-28 05:30:18,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:30:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 429654 backedges. 0 proven. 49296 refuted. 0 times theorem prover too weak. 380358 trivial. 0 not checked. [2024-11-28 05:30:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:30:22,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752293842] [2024-11-28 05:30:22,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752293842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:30:22,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710414687] [2024-11-28 05:30:22,410 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:30:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:30:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:30:22,411 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:30:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 05:31:30,281 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2024-11-28 05:31:30,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:31:30,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 3971 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-28 05:31:30,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:31:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 429654 backedges. 89531 proven. 4188 refuted. 0 times theorem prover too weak. 335935 trivial. 0 not checked. [2024-11-28 05:31:33,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:31:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 429654 backedges. 89531 proven. 4188 refuted. 0 times theorem prover too weak. 335935 trivial. 0 not checked. [2024-11-28 05:31:37,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710414687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:31:37,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:31:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 59, 59] total 144 [2024-11-28 05:31:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491260556] [2024-11-28 05:31:37,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:31:37,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-11-28 05:31:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:31:37,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-11-28 05:31:37,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2909, Invalid=17683, Unknown=0, NotChecked=0, Total=20592 [2024-11-28 05:31:37,181 INFO L87 Difference]: Start difference. First operand 7027 states and 7541 transitions. Second operand has 144 states, 144 states have (on average 3.986111111111111) internal successors, (574), 144 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 05:31:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:31:42,921 INFO L93 Difference]: Finished difference Result 8946 states and 9650 transitions. [2024-11-28 05:31:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-28 05:31:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 3.986111111111111) internal successors, (574), 144 states have internal predecessors, (574), 0 states have call successors, (0), 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 2039 [2024-11-28 05:31:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:31:42,936 INFO L225 Difference]: With dead ends: 8946 [2024-11-28 05:31:42,936 INFO L226 Difference]: Without dead ends: 8946 [2024-11-28 05:31:42,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4196 GetRequests, 3963 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14840 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=9371, Invalid=44685, Unknown=0, NotChecked=0, Total=54056 [2024-11-28 05:31:42,943 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 397 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:31:42,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 43 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:31:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8946 states. [2024-11-28 05:31:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8946 to 8551. [2024-11-28 05:31:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8551 states, 8550 states have (on average 1.079766081871345) internal successors, (9232), 8550 states have internal predecessors, (9232), 0 states have call successors, (0), 0 states 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 05:31:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8551 states to 8551 states and 9232 transitions. [2024-11-28 05:31:43,036 INFO L78 Accepts]: Start accepts. Automaton has 8551 states and 9232 transitions. Word has length 2039 [2024-11-28 05:31:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:31:43,037 INFO L471 AbstractCegarLoop]: Abstraction has 8551 states and 9232 transitions. [2024-11-28 05:31:43,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 3.986111111111111) internal successors, (574), 144 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 05:31:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8551 states and 9232 transitions. [2024-11-28 05:31:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2048 [2024-11-28 05:31:43,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:31:43,076 INFO L218 NwaCegarLoop]: trace histogram [457, 456, 456, 456, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:31:43,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 05:31:43,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 05:31:43,276 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:31:43,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:31:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1665664118, now seen corresponding path program 25 times [2024-11-28 05:31:43,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:31:43,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372009260] [2024-11-28 05:31:43,277 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:31:43,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:31:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:31:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 433356 backedges. 220892 proven. 1671 refuted. 0 times theorem prover too weak. 210793 trivial. 0 not checked. [2024-11-28 05:31:52,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:31:52,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372009260] [2024-11-28 05:31:52,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372009260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:31:52,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996066855] [2024-11-28 05:31:52,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:31:52,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:31:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:31:52,738 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:31:52,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 05:31:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:31:54,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 6967 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 05:31:54,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:31:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 433356 backedges. 229510 proven. 9526 refuted. 0 times theorem prover too weak. 194320 trivial. 0 not checked. [2024-11-28 05:31:56,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:31:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 433356 backedges. 229510 proven. 9526 refuted. 0 times theorem prover too weak. 194320 trivial. 0 not checked. [2024-11-28 05:31:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996066855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:31:57,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:31:57,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 70 [2024-11-28 05:31:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047612991] [2024-11-28 05:31:57,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:31:57,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 05:31:57,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:31:57,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 05:31:57,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=3994, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:31:57,702 INFO L87 Difference]: Start difference. First operand 8551 states and 9232 transitions. Second operand has 70 states, 70 states have (on average 5.642857142857143) internal successors, (395), 70 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 05:32:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:32:10,142 INFO L93 Difference]: Finished difference Result 8551 states and 9158 transitions. [2024-11-28 05:32:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2024-11-28 05:32:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 5.642857142857143) internal successors, (395), 70 states have internal predecessors, (395), 0 states have call successors, (0), 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 2047 [2024-11-28 05:32:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:32:10,151 INFO L225 Difference]: With dead ends: 8551 [2024-11-28 05:32:10,151 INFO L226 Difference]: Without dead ends: 8551 [2024-11-28 05:32:10,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4300 GetRequests, 4031 SyntacticMatches, 31 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17870 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9848, Invalid=47512, Unknown=0, NotChecked=0, Total=57360 [2024-11-28 05:32:10,155 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 11946 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 11965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 11946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:32:10,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 159 Invalid, 11965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 11946 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-28 05:32:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2024-11-28 05:32:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 8551. [2024-11-28 05:32:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8551 states, 8550 states have (on average 1.0711111111111111) internal successors, (9158), 8550 states have internal predecessors, (9158), 0 states have call successors, (0), 0 states 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 05:32:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8551 states to 8551 states and 9158 transitions. [2024-11-28 05:32:10,238 INFO L78 Accepts]: Start accepts. Automaton has 8551 states and 9158 transitions. Word has length 2047 [2024-11-28 05:32:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:32:10,239 INFO L471 AbstractCegarLoop]: Abstraction has 8551 states and 9158 transitions. [2024-11-28 05:32:10,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 5.642857142857143) internal successors, (395), 70 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 05:32:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8551 states and 9158 transitions. [2024-11-28 05:32:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2096 [2024-11-28 05:32:10,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:32:10,274 INFO L218 NwaCegarLoop]: trace histogram [469, 468, 468, 468, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:32:10,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 05:32:10,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 05:32:10,475 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:32:10,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:32:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2026876042, now seen corresponding path program 26 times [2024-11-28 05:32:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:32:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992729912] [2024-11-28 05:32:10,477 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:32:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:32:11,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:32:11,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 455904 backedges. 250854 proven. 12376 refuted. 0 times theorem prover too weak. 192674 trivial. 0 not checked. [2024-11-28 05:32:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:32:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992729912] [2024-11-28 05:32:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992729912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:32:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861262817] [2024-11-28 05:32:21,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:32:21,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:32:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:32:21,840 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:32:21,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 05:32:23,778 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:32:23,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:23,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 7123 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 05:32:23,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:32:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 455904 backedges. 257428 proven. 11337 refuted. 0 times theorem prover too weak. 187139 trivial. 0 not checked. [2024-11-28 05:32:25,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:32:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 455904 backedges. 257428 proven. 11337 refuted. 0 times theorem prover too weak. 187139 trivial. 0 not checked. [2024-11-28 05:32:26,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861262817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:32:26,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:32:26,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 37, 37] total 70 [2024-11-28 05:32:26,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706478446] [2024-11-28 05:32:26,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:32:26,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-28 05:32:26,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:32:26,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-28 05:32:26,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=3956, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 05:32:26,899 INFO L87 Difference]: Start difference. First operand 8551 states and 9158 transitions. Second operand has 70 states, 70 states have (on average 5.8) internal successors, (406), 70 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 05:32:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:32:39,004 INFO L93 Difference]: Finished difference Result 8551 states and 9093 transitions. [2024-11-28 05:32:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2024-11-28 05:32:39,005 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 5.8) internal successors, (406), 70 states have internal predecessors, (406), 0 states have call successors, (0), 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 2095 [2024-11-28 05:32:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:32:39,010 INFO L225 Difference]: With dead ends: 8551 [2024-11-28 05:32:39,010 INFO L226 Difference]: Without dead ends: 8551 [2024-11-28 05:32:39,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4419 GetRequests, 4129 SyntacticMatches, 33 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20561 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12143, Invalid=54679, Unknown=0, NotChecked=0, Total=66822 [2024-11-28 05:32:39,014 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 108 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 9051 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 9069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 9051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:32:39,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 153 Invalid, 9069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 9051 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-28 05:32:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2024-11-28 05:32:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 8551. [2024-11-28 05:32:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8551 states, 8550 states have (on average 1.0635087719298246) internal successors, (9093), 8550 states have internal predecessors, (9093), 0 states have call successors, (0), 0 states 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 05:32:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8551 states to 8551 states and 9093 transitions. [2024-11-28 05:32:39,088 INFO L78 Accepts]: Start accepts. Automaton has 8551 states and 9093 transitions. Word has length 2095 [2024-11-28 05:32:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:32:39,089 INFO L471 AbstractCegarLoop]: Abstraction has 8551 states and 9093 transitions. [2024-11-28 05:32:39,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 5.8) internal successors, (406), 70 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 05:32:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8551 states and 9093 transitions. [2024-11-28 05:32:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2140 [2024-11-28 05:32:39,126 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:32:39,126 INFO L218 NwaCegarLoop]: trace histogram [480, 479, 479, 479, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:32:39,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 05:32:39,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:32:39,327 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:32:39,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:32:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1425572222, now seen corresponding path program 27 times [2024-11-28 05:32:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:32:39,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101243707] [2024-11-28 05:32:39,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:32:39,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:32:40,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-28 05:32:40,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 477079 backedges. 0 proven. 53881 refuted. 0 times theorem prover too weak. 423198 trivial. 0 not checked. [2024-11-28 05:32:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:32:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101243707] [2024-11-28 05:32:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101243707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:32:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699950423] [2024-11-28 05:32:42,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:32:42,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:32:42,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:32:42,248 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:32:42,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 05:32:54,415 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-28 05:32:54,415 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:54,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-28 05:32:54,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:32:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 477079 backedges. 98039 proven. 4511 refuted. 0 times theorem prover too weak. 374529 trivial. 0 not checked. [2024-11-28 05:32:57,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:33:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 477079 backedges. 98039 proven. 4511 refuted. 0 times theorem prover too weak. 374529 trivial. 0 not checked. [2024-11-28 05:33:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699950423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:33:02,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:33:02,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 61, 61] total 149 [2024-11-28 05:33:02,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216751739] [2024-11-28 05:33:02,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:33:02,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2024-11-28 05:33:02,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:33:02,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2024-11-28 05:33:02,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3114, Invalid=18938, Unknown=0, NotChecked=0, Total=22052 [2024-11-28 05:33:02,259 INFO L87 Difference]: Start difference. First operand 8551 states and 9093 transitions. Second operand has 149 states, 149 states have (on average 3.9865771812080535) internal successors, (594), 149 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 05:33:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:33:08,556 INFO L93 Difference]: Finished difference Result 10269 states and 10954 transitions. [2024-11-28 05:33:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-28 05:33:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.9865771812080535) internal successors, (594), 149 states have internal predecessors, (594), 0 states have call successors, (0), 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 2139 [2024-11-28 05:33:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:33:08,562 INFO L225 Difference]: With dead ends: 10269 [2024-11-28 05:33:08,562 INFO L226 Difference]: Without dead ends: 10269 [2024-11-28 05:33:08,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4400 GetRequests, 4159 SyntacticMatches, 2 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15907 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=10009, Invalid=47831, Unknown=0, NotChecked=0, Total=57840 [2024-11-28 05:33:08,565 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 377 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:33:08,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 46 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2103 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:33:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2024-11-28 05:33:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 9476. [2024-11-28 05:33:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 1.067018469656992) internal successors, (10110), 9475 states have internal predecessors, (10110), 0 states have call successors, (0), 0 states 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 05:33:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 10110 transitions. [2024-11-28 05:33:08,628 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 10110 transitions. Word has length 2139 [2024-11-28 05:33:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:33:08,629 INFO L471 AbstractCegarLoop]: Abstraction has 9476 states and 10110 transitions. [2024-11-28 05:33:08,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.9865771812080535) internal successors, (594), 149 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 05:33:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 10110 transitions. [2024-11-28 05:33:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2176 [2024-11-28 05:33:08,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:33:08,651 INFO L218 NwaCegarLoop]: trace histogram [489, 488, 488, 488, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:33:08,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 05:33:08,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-28 05:33:08,852 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:33:08,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:33:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash -933090854, now seen corresponding path program 28 times [2024-11-28 05:33:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:33:08,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332225004] [2024-11-28 05:33:08,853 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:33:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:33:09,411 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:33:09,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:33:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 494764 backedges. 268361 proven. 2089 refuted. 0 times theorem prover too weak. 224314 trivial. 0 not checked. [2024-11-28 05:33:16,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:33:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332225004] [2024-11-28 05:33:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332225004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:33:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559826159] [2024-11-28 05:33:16,514 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:33:16,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:33:16,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:33:16,516 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:33:16,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 05:33:18,512 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:33:18,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:33:18,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 6713 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:33:18,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:33:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 494764 backedges. 291947 proven. 14240 refuted. 0 times theorem prover too weak. 188577 trivial. 0 not checked. [2024-11-28 05:33:20,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:33:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 494764 backedges. 292824 proven. 13363 refuted. 0 times theorem prover too weak. 188577 trivial. 0 not checked. [2024-11-28 05:33:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559826159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:33:23,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:33:23,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 99 [2024-11-28 05:33:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632647160] [2024-11-28 05:33:23,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:33:23,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-28 05:33:23,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:33:23,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-28 05:33:23,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=8206, Unknown=0, NotChecked=0, Total=9702 [2024-11-28 05:33:23,105 INFO L87 Difference]: Start difference. First operand 9476 states and 10110 transitions. Second operand has 99 states, 99 states have (on average 5.191919191919192) internal successors, (514), 99 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 05:33:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:33:42,201 INFO L93 Difference]: Finished difference Result 9487 states and 10046 transitions. [2024-11-28 05:33:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2024-11-28 05:33:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 5.191919191919192) internal successors, (514), 99 states have internal predecessors, (514), 0 states have call successors, (0), 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 2175 [2024-11-28 05:33:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:33:42,210 INFO L225 Difference]: With dead ends: 9487 [2024-11-28 05:33:42,210 INFO L226 Difference]: Without dead ends: 9487 [2024-11-28 05:33:42,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4599 GetRequests, 4274 SyntacticMatches, 18 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25598 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=16633, Invalid=78539, Unknown=0, NotChecked=0, Total=95172 [2024-11-28 05:33:42,216 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 109 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 12900 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 12927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 12900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:33:42,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 137 Invalid, 12927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 12900 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-28 05:33:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9487 states. [2024-11-28 05:33:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9487 to 9476. [2024-11-28 05:33:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9476 states, 9475 states have (on average 1.05910290237467) internal successors, (10035), 9475 states have internal predecessors, (10035), 0 states have call successors, (0), 0 states 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 05:33:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9476 states to 9476 states and 10035 transitions. [2024-11-28 05:33:42,294 INFO L78 Accepts]: Start accepts. Automaton has 9476 states and 10035 transitions. Word has length 2175 [2024-11-28 05:33:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:33:42,295 INFO L471 AbstractCegarLoop]: Abstraction has 9476 states and 10035 transitions. [2024-11-28 05:33:42,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 5.191919191919192) internal successors, (514), 99 states have internal predecessors, (514), 0 states have call successors, (0), 0 states 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 05:33:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9476 states and 10035 transitions. [2024-11-28 05:33:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2212 [2024-11-28 05:33:42,319 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:33:42,319 INFO L218 NwaCegarLoop]: trace histogram [498, 497, 497, 497, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:33:42,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-28 05:33:42,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 05:33:42,520 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:33:42,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:33:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash -945811230, now seen corresponding path program 29 times [2024-11-28 05:33:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:33:42,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58928459] [2024-11-28 05:33:42,521 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:33:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:33:46,362 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2024-11-28 05:33:46,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:33:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 512773 backedges. 299832 proven. 9576 refuted. 0 times theorem prover too weak. 203365 trivial. 0 not checked. [2024-11-28 05:33:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:33:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58928459] [2024-11-28 05:33:51,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58928459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:33:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966428140] [2024-11-28 05:33:51,153 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:33:51,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:33:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:33:51,155 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:33:51,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 05:34:36,847 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2024-11-28 05:34:36,848 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:34:36,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 4290 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-28 05:34:36,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:34:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 512773 backedges. 318552 proven. 18106 refuted. 0 times theorem prover too weak. 176115 trivial. 0 not checked. [2024-11-28 05:34:38,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:34:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 512773 backedges. 322200 proven. 14458 refuted. 0 times theorem prover too weak. 176115 trivial. 0 not checked. [2024-11-28 05:34:40,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966428140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:34:40,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:34:40,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 85 [2024-11-28 05:34:40,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982799570] [2024-11-28 05:34:40,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:34:40,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-28 05:34:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:34:40,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-28 05:34:40,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=5915, Unknown=0, NotChecked=0, Total=7140 [2024-11-28 05:34:40,849 INFO L87 Difference]: Start difference. First operand 9476 states and 10035 transitions. Second operand has 85 states, 85 states have (on average 5.1647058823529415) internal successors, (439), 85 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 05:34:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:34:55,263 INFO L93 Difference]: Finished difference Result 9698 states and 10196 transitions. [2024-11-28 05:34:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-28 05:34:55,263 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 5.1647058823529415) internal successors, (439), 85 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 2211 [2024-11-28 05:34:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:34:55,269 INFO L225 Difference]: With dead ends: 9698 [2024-11-28 05:34:55,269 INFO L226 Difference]: Without dead ends: 9698 [2024-11-28 05:34:55,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4674 GetRequests, 4346 SyntacticMatches, 34 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26011 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=16570, Invalid=70750, Unknown=0, NotChecked=0, Total=87320 [2024-11-28 05:34:55,274 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 9567 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 9567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:34:55,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 143 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 9567 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-28 05:34:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9698 states. [2024-11-28 05:34:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9698 to 9642. [2024-11-28 05:34:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9642 states, 9641 states have (on average 1.0509283269370397) internal successors, (10132), 9641 states have internal predecessors, (10132), 0 states have call successors, (0), 0 states 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 05:34:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9642 states to 9642 states and 10132 transitions. [2024-11-28 05:34:55,354 INFO L78 Accepts]: Start accepts. Automaton has 9642 states and 10132 transitions. Word has length 2211 [2024-11-28 05:34:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:34:55,355 INFO L471 AbstractCegarLoop]: Abstraction has 9642 states and 10132 transitions. [2024-11-28 05:34:55,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 5.1647058823529415) internal successors, (439), 85 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 05:34:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 9642 states and 10132 transitions. [2024-11-28 05:34:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2244 [2024-11-28 05:34:55,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:34:55,390 INFO L218 NwaCegarLoop]: trace histogram [506, 505, 505, 505, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:34:55,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 05:34:55,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 05:34:55,591 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:34:55,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:34:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1375387362, now seen corresponding path program 30 times [2024-11-28 05:34:55,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:34:55,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471173545] [2024-11-28 05:34:55,592 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:34:55,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:35:00,429 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2024-11-28 05:35:00,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:35:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 529053 backedges. 0 proven. 58780 refuted. 0 times theorem prover too weak. 470273 trivial. 0 not checked. [2024-11-28 05:35:04,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:35:04,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471173545] [2024-11-28 05:35:04,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471173545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:35:04,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985837828] [2024-11-28 05:35:04,560 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 05:35:04,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:35:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:35:04,562 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:35:04,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 05:36:33,675 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2024-11-28 05:36:33,675 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:36:33,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 4400 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 05:36:33,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:36:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 529053 backedges. 107150 proven. 4846 refuted. 0 times theorem prover too weak. 417057 trivial. 0 not checked. [2024-11-28 05:36:37,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:36:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 529053 backedges. 107150 proven. 4846 refuted. 0 times theorem prover too weak. 417057 trivial. 0 not checked. [2024-11-28 05:36:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985837828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:36:42,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:36:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 63, 63] total 155 [2024-11-28 05:36:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958596207] [2024-11-28 05:36:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:36:42,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2024-11-28 05:36:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:36:42,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2024-11-28 05:36:42,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3304, Invalid=20566, Unknown=0, NotChecked=0, Total=23870 [2024-11-28 05:36:42,403 INFO L87 Difference]: Start difference. First operand 9642 states and 10132 transitions. Second operand has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 155 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 05:36:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:36:49,799 INFO L93 Difference]: Finished difference Result 11252 states and 11862 transitions. [2024-11-28 05:36:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-28 05:36:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 155 states have internal predecessors, (614), 0 states have call successors, (0), 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 2243 [2024-11-28 05:36:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:36:49,808 INFO L225 Difference]: With dead ends: 11252 [2024-11-28 05:36:49,808 INFO L226 Difference]: Without dead ends: 11252 [2024-11-28 05:36:49,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4613 GetRequests, 4363 SyntacticMatches, 2 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17200 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=10614, Invalid=51636, Unknown=0, NotChecked=0, Total=62250 [2024-11-28 05:36:49,814 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 515 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:36:49,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 37 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 05:36:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11252 states. [2024-11-28 05:36:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11252 to 10365. [2024-11-28 05:36:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10365 states, 10364 states have (on average 1.0542261675028946) internal successors, (10926), 10364 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states 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 05:36:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 10926 transitions. [2024-11-28 05:36:49,900 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 10926 transitions. Word has length 2243 [2024-11-28 05:36:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:36:49,902 INFO L471 AbstractCegarLoop]: Abstraction has 10365 states and 10926 transitions. [2024-11-28 05:36:49,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 3.9612903225806453) internal successors, (614), 155 states have internal predecessors, (614), 0 states have call successors, (0), 0 states 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 05:36:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 10926 transitions. [2024-11-28 05:36:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2284 [2024-11-28 05:36:49,934 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:36:49,934 INFO L218 NwaCegarLoop]: trace histogram [516, 515, 515, 515, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1] [2024-11-28 05:36:49,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 05:36:50,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:36:50,135 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-11-28 05:36:50,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:36:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1498555662, now seen corresponding path program 31 times [2024-11-28 05:36:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:36:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823391809] [2024-11-28 05:36:50,136 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:36:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:36:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:37:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 549763 backedges. 304419 proven. 2571 refuted. 0 times theorem prover too weak. 242773 trivial. 0 not checked. [2024-11-28 05:37:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:37:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823391809] [2024-11-28 05:37:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823391809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:37:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999688745] [2024-11-28 05:37:03,412 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 05:37:03,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:37:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:37:03,414 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:37:03,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff3d3d5-546f-4aeb-8e14-5f691b62f504/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 05:37:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:37:05,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 7734 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:37:05,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:37:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 549763 backedges. 358926 proven. 18108 refuted. 0 times theorem prover too weak. 172729 trivial. 0 not checked. [2024-11-28 05:37:08,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:37:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 549763 backedges. 358926 proven. 18108 refuted. 0 times theorem prover too weak. 172729 trivial. 0 not checked. [2024-11-28 05:37:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999688745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:37:10,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:37:10,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43, 43] total 86 [2024-11-28 05:37:10,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813262738] [2024-11-28 05:37:10,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:37:10,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-28 05:37:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:37:10,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-28 05:37:10,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=6068, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 05:37:10,528 INFO L87 Difference]: Start difference. First operand 10365 states and 10926 transitions. Second operand has 86 states, 86 states have (on average 5.662790697674419) internal successors, (487), 86 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)