./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:37:57,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:37:57,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 22:37:57,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:37:57,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:37:57,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:37:57,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:37:57,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:37:57,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:37:57,271 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:37:57,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:37:57,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:37:57,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:37:57,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:37:57,273 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:37:57,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:37:57,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 22:37:57,274 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:37:57,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:37:57,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:37:57,274 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:37:57,274 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:37:57,275 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:37:57,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:37:57,276 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:37:57,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:37:57,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:37:57,277 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:37:57,277 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:37:57,277 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:37:57,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:37:57,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:37:57,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:37:57,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:37:57,279 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:37:57,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:37:57,279 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_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC 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 ! call(reach_error())) ) 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 -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2024-11-23 22:37:57,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:37:57,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:37:57,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:37:57,618 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:37:57,618 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:37:57,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-23 22:38:00,683 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/data/6d27523b8/2fe5fc3bc85c43cbba1f0cb7ba75faf7/FLAG1ec99bd3d [2024-11-23 22:38:00,989 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:38:00,990 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-23 22:38:00,998 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/data/6d27523b8/2fe5fc3bc85c43cbba1f0cb7ba75faf7/FLAG1ec99bd3d [2024-11-23 22:38:01,015 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/data/6d27523b8/2fe5fc3bc85c43cbba1f0cb7ba75faf7 [2024-11-23 22:38:01,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:38:01,019 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:38:01,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:38:01,021 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:38:01,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:38:01,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c519c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01, skipping insertion in model container [2024-11-23 22:38:01,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,044 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:38:01,216 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-23 22:38:01,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:38:01,251 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:38:01,265 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-23 22:38:01,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:38:01,300 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:38:01,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01 WrapperNode [2024-11-23 22:38:01,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:38:01,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:38:01,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:38:01,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:38:01,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,341 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2024-11-23 22:38:01,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:38:01,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:38:01,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:38:01,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:38:01,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,357 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,378 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 22:38:01,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,385 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:38:01,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:38:01,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:38:01,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:38:01,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (1/1) ... [2024-11-23 22:38:01,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:38:01,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:01,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:38:01,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:38:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:38:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:38:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:38:01,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:38:01,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 22:38:01,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 22:38:01,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 22:38:01,606 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:38:01,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:38:01,870 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-23 22:38:01,870 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:38:01,882 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:38:01,883 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-23 22:38:01,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:01 BoogieIcfgContainer [2024-11-23 22:38:01,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:38:01,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:38:01,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:38:01,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:38:01,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:38:01" (1/3) ... [2024-11-23 22:38:01,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42923af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:01, skipping insertion in model container [2024-11-23 22:38:01,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:38:01" (2/3) ... [2024-11-23 22:38:01,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42923af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:38:01, skipping insertion in model container [2024-11-23 22:38:01,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:38:01" (3/3) ... [2024-11-23 22:38:01,898 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-11-23 22:38:01,915 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:38:01,917 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_array_index_value_1-1.i that has 2 procedures, 22 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-23 22:38:01,976 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:38:01,989 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=LoopHeads, 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;@1db53819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:38:01,990 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 22:38:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-23 22:38:02,000 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:02,001 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:02,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:02,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1107634056, now seen corresponding path program 1 times [2024-11-23 22:38:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:02,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799840519] [2024-11-23 22:38:02,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:02,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:02,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799840519] [2024-11-23 22:38:02,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799840519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:38:02,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:38:02,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:38:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620060764] [2024-11-23 22:38:02,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:38:02,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:38:02,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:02,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:38:02,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:38:02,388 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:02,491 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-23 22:38:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:38:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-23 22:38:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:02,503 INFO L225 Difference]: With dead ends: 47 [2024-11-23 22:38:02,503 INFO L226 Difference]: Without dead ends: 25 [2024-11-23 22:38:02,509 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 [2024-11-23 22:38:02,514 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:02,515 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:38:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-23 22:38:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-23 22:38:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-23 22:38:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-23 22:38:02,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2024-11-23 22:38:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:02,568 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-23 22:38:02,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-23 22:38:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 22:38:02,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:02,571 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:02,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:38:02,572 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:02,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 841709834, now seen corresponding path program 1 times [2024-11-23 22:38:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:02,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332828945] [2024-11-23 22:38:02,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332828945] [2024-11-23 22:38:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332828945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425698023] [2024-11-23 22:38:02,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:02,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:02,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:38:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:03,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 22:38:03,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:03,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 22:38:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:03,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:03,726 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 48 treesize of output 44 [2024-11-23 22:38:03,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:03,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:38:03,896 INFO L349 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2024-11-23 22:38:03,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 43 [2024-11-23 22:38:03,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:03,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2024-11-23 22:38:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425698023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:03,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:03,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 10] total 15 [2024-11-23 22:38:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743455015] [2024-11-23 22:38:03,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:03,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 22:38:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:03,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 22:38:03,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-23 22:38:03,991 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:04,375 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-23 22:38:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 22:38:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-23 22:38:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:04,377 INFO L225 Difference]: With dead ends: 53 [2024-11-23 22:38:04,377 INFO L226 Difference]: Without dead ends: 37 [2024-11-23 22:38:04,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-23 22:38:04,381 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:04,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 81 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:38:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-23 22:38:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-11-23 22:38:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-23 22:38:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-23 22:38:04,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2024-11-23 22:38:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:04,396 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-23 22:38:04,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-23 22:38:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-23 22:38:04,397 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:04,397 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:04,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 22:38:04,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:04,602 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:04,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash 607591503, now seen corresponding path program 1 times [2024-11-23 22:38:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:04,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348048578] [2024-11-23 22:38:04,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:38:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348048578] [2024-11-23 22:38:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348048578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724167263] [2024-11-23 22:38:04,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:04,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:04,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:04,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:04,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:38:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:04,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 22:38:04,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:04,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 22:38:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:05,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:09,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-23 22:38:09,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:09,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:38:09,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:09,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 52 [2024-11-23 22:38:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:38:09,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724167263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:09,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:09,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2024-11-23 22:38:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421363257] [2024-11-23 22:38:09,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:09,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 22:38:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:09,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 22:38:09,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2024-11-23 22:38:09,983 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-23 22:38:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:10,889 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-11-23 22:38:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-23 22:38:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2024-11-23 22:38:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:10,891 INFO L225 Difference]: With dead ends: 78 [2024-11-23 22:38:10,893 INFO L226 Difference]: Without dead ends: 53 [2024-11-23 22:38:10,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=166, Invalid=645, Unknown=1, NotChecked=0, Total=812 [2024-11-23 22:38:10,895 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:10,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:38:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-23 22:38:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2024-11-23 22:38:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-23 22:38:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-11-23 22:38:10,924 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2024-11-23 22:38:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:10,924 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-11-23 22:38:10,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-23 22:38:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-11-23 22:38:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-23 22:38:10,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:10,925 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:10,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 22:38:11,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:11,126 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:11,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1260676754, now seen corresponding path program 1 times [2024-11-23 22:38:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:11,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939049658] [2024-11-23 22:38:11,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 22:38:11,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:11,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939049658] [2024-11-23 22:38:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939049658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:11,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928180398] [2024-11-23 22:38:11,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:38:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:11,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:11,378 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:11,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:38:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:38:11,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-23 22:38:11,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:11,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 22:38:11,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-23 22:38:11,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:11,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-23 22:38:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:38:12,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:15,591 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 48 treesize of output 44 [2024-11-23 22:38:15,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:15,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:38:15,963 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2024-11-23 22:38:15,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 272 [2024-11-23 22:38:16,145 INFO L349 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2024-11-23 22:38:16,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 282 [2024-11-23 22:38:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:38:16,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928180398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:16,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:16,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 21] total 36 [2024-11-23 22:38:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784888318] [2024-11-23 22:38:16,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:16,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-23 22:38:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:16,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-23 22:38:16,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 22:38:16,698 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 36 states, 32 states have (on average 2.15625) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-23 22:38:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:20,972 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2024-11-23 22:38:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-23 22:38:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.15625) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2024-11-23 22:38:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:20,974 INFO L225 Difference]: With dead ends: 120 [2024-11-23 22:38:20,976 INFO L226 Difference]: Without dead ends: 87 [2024-11-23 22:38:20,977 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=638, Invalid=2442, Unknown=0, NotChecked=0, Total=3080 [2024-11-23 22:38:20,978 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:20,979 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 136 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 22:38:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-23 22:38:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2024-11-23 22:38:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-23 22:38:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2024-11-23 22:38:21,009 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 34 [2024-11-23 22:38:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:21,009 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2024-11-23 22:38:21,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.15625) internal successors, (69), 35 states have internal predecessors, (69), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-23 22:38:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2024-11-23 22:38:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 22:38:21,012 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:21,012 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:21,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 22:38:21,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-23 22:38:21,213 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:21,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1058887531, now seen corresponding path program 2 times [2024-11-23 22:38:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:21,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106962587] [2024-11-23 22:38:21,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:21,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:21,260 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:21,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 22:38:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106962587] [2024-11-23 22:38:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106962587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277175141] [2024-11-23 22:38:21,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:38:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:21,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:21,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 22:38:21,542 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:38:21,542 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:21,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-23 22:38:21,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:21,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 22:38:21,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-23 22:38:21,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:21,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-23 22:38:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:38:22,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:27,438 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 48 treesize of output 44 [2024-11-23 22:38:27,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:27,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:38:27,984 INFO L349 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2024-11-23 22:38:27,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 354 treesize of output 313 [2024-11-23 22:38:28,176 INFO L349 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2024-11-23 22:38:28,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 264 treesize of output 249 [2024-11-23 22:38:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 22:38:28,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277175141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:28,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:28,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 27] total 49 [2024-11-23 22:38:28,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751191682] [2024-11-23 22:38:28,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:28,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-23 22:38:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:28,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-23 22:38:28,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 22:38:28,717 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 49 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 47 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-23 22:38:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:45,553 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2024-11-23 22:38:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-23 22:38:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 47 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2024-11-23 22:38:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:45,555 INFO L225 Difference]: With dead ends: 158 [2024-11-23 22:38:45,556 INFO L226 Difference]: Without dead ends: 100 [2024-11-23 22:38:45,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=965, Invalid=4291, Unknown=0, NotChecked=0, Total=5256 [2024-11-23 22:38:45,559 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:45,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 223 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-23 22:38:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-23 22:38:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2024-11-23 22:38:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 64 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-23 22:38:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2024-11-23 22:38:45,585 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 45 [2024-11-23 22:38:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:45,585 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2024-11-23 22:38:45,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 47 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-23 22:38:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2024-11-23 22:38:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-23 22:38:45,587 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:45,587 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:45,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 22:38:45,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:45,789 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:45,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -829091118, now seen corresponding path program 3 times [2024-11-23 22:38:45,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081040014] [2024-11-23 22:38:45,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:45,963 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 22:38:45,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-23 22:38:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081040014] [2024-11-23 22:38:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081040014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297524834] [2024-11-23 22:38:46,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:46,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:46,569 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:46,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 22:38:47,163 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 22:38:47,164 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:47,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-23 22:38:47,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:47,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 22:38:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 3 proven. 74 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 22:38:47,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:48,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-23 22:38:48,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:48,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:38:49,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:38:49,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 48 [2024-11-23 22:38:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 22:38:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297524834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:49,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 19] total 39 [2024-11-23 22:38:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731536627] [2024-11-23 22:38:49,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:49,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-23 22:38:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:49,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-23 22:38:49,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2024-11-23 22:38:49,460 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 39 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-23 22:38:53,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:38:55,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:39:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:39:02,417 INFO L93 Difference]: Finished difference Result 189 states and 219 transitions. [2024-11-23 22:39:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-23 22:39:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2024-11-23 22:39:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:39:02,420 INFO L225 Difference]: With dead ends: 189 [2024-11-23 22:39:02,420 INFO L226 Difference]: Without dead ends: 124 [2024-11-23 22:39:02,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=747, Invalid=3945, Unknown=0, NotChecked=0, Total=4692 [2024-11-23 22:39:02,424 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:39:02,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 303 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 971 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2024-11-23 22:39:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-23 22:39:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2024-11-23 22:39:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 90 states have internal predecessors, (98), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-23 22:39:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2024-11-23 22:39:02,475 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 56 [2024-11-23 22:39:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:39:02,475 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2024-11-23 22:39:02,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 states have internal predecessors, (90), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-23 22:39:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2024-11-23 22:39:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-23 22:39:02,478 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:39:02,478 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 22:39:02,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 22:39:02,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 22:39:02,679 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:39:02,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:39:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1666442873, now seen corresponding path program 4 times [2024-11-23 22:39:02,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:39:02,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232825752] [2024-11-23 22:39:02,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:39:02,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:39:02,712 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:39:02,712 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-23 22:39:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232825752] [2024-11-23 22:39:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232825752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708910777] [2024-11-23 22:39:03,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:39:03,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:03,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:03,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 22:39:03,145 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:39:03,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:03,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-23 22:39:03,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:39:03,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 22:39:03,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-23 22:39:03,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:39:03,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-23 22:39:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:39:08,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:40:30,383 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 48 treesize of output 44 [2024-11-23 22:40:30,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:40:30,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:40:32,170 INFO L349 Elim1Store]: treesize reduction 25, result has 51.0 percent of original size [2024-11-23 22:40:32,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1801 treesize of output 1766 [2024-11-23 22:40:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 96 refuted. 9 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 22:40:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708910777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:40:35,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:40:35,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 33, 40] total 76 [2024-11-23 22:40:35,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814906815] [2024-11-23 22:40:35,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:40:35,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-23 22:40:35,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:40:35,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-23 22:40:35,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=4939, Unknown=12, NotChecked=0, Total=5700 [2024-11-23 22:40:35,134 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 76 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 73 states have internal predecessors, (128), 13 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-23 22:41:05,885 WARN L286 SmtUtils]: Spent 15.58s on a formula simplification. DAG size of input: 145 DAG size of output: 138 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:41:19,784 WARN L286 SmtUtils]: Spent 10.34s on a formula simplification. DAG size of input: 129 DAG size of output: 124 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:41:22,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:41:29,570 WARN L286 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 143 DAG size of output: 136 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:41:36,664 WARN L286 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 141 DAG size of output: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:41:38,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:41:46,913 WARN L286 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 139 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:41:53,223 WARN L286 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 127 DAG size of output: 122 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:42:13,816 WARN L286 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 136 DAG size of output: 129 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:42:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:42:13,820 INFO L93 Difference]: Finished difference Result 253 states and 295 transitions. [2024-11-23 22:42:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-23 22:42:13,820 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 73 states have internal predecessors, (128), 13 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 67 [2024-11-23 22:42:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:42:13,822 INFO L225 Difference]: With dead ends: 253 [2024-11-23 22:42:13,822 INFO L226 Difference]: Without dead ends: 158 [2024-11-23 22:42:13,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 9 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 157.5s TimeCoverageRelationStatistics Valid=1885, Invalid=10313, Unknown=12, NotChecked=0, Total=12210 [2024-11-23 22:42:13,827 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 265 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:42:13,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 578 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1761 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2024-11-23 22:42:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-23 22:42:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2024-11-23 22:42:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 113 states have internal predecessors, (123), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-23 22:42:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2024-11-23 22:42:13,897 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 67 [2024-11-23 22:42:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:42:13,898 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2024-11-23 22:42:13,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 73 states have internal predecessors, (128), 13 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-23 22:42:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2024-11-23 22:42:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-23 22:42:13,900 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:42:13,900 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-23 22:42:13,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 22:42:14,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:42:14,105 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:42:14,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:42:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1443355338, now seen corresponding path program 5 times [2024-11-23 22:42:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:42:14,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64115008] [2024-11-23 22:42:14,106 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:42:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:42:14,333 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-23 22:42:14,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:42:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-23 22:42:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:42:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64115008] [2024-11-23 22:42:14,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64115008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:42:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617087732] [2024-11-23 22:42:14,710 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:42:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:42:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:42:14,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:42:14,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 22:43:31,351 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-23 22:43:31,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:43:31,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-23 22:43:31,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:43:31,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 22:43:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-23 22:43:32,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:43:33,701 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 48 treesize of output 44 [2024-11-23 22:43:33,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:43:33,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:43:33,792 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2024-11-23 22:43:33,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 47 [2024-11-23 22:43:33,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:43:33,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-23 22:43:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-23 22:43:34,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617087732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:43:34,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:43:34,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23, 22] total 44 [2024-11-23 22:43:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21987942] [2024-11-23 22:43:34,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:43:34,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-23 22:43:34,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:43:34,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-23 22:43:34,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1668, Unknown=0, NotChecked=0, Total=1892 [2024-11-23 22:43:34,516 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 44 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 15 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-23 22:43:38,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:43:42,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:43:48,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 22:44:13,644 WARN L286 SmtUtils]: Spent 21.34s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:44:16,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 22:44:32,787 WARN L286 SmtUtils]: Spent 8.77s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:45:17,027 WARN L286 SmtUtils]: Spent 43.80s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:45:32,565 WARN L286 SmtUtils]: Spent 15.13s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:45:40,846 WARN L286 SmtUtils]: Spent 7.99s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:46:08,349 WARN L286 SmtUtils]: Spent 27.42s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:46:17,501 WARN L286 SmtUtils]: Spent 9.08s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:46:26,574 WARN L286 SmtUtils]: Spent 7.40s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:46:52,802 WARN L286 SmtUtils]: Spent 22.88s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:46:54,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:47:10,110 WARN L286 SmtUtils]: Spent 7.61s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:47:12,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:47:14,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 22:47:44,875 WARN L286 SmtUtils]: Spent 22.09s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:47:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:47:47,462 INFO L93 Difference]: Finished difference Result 326 states and 386 transitions. [2024-11-23 22:47:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-23 22:47:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 15 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 78 [2024-11-23 22:47:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:47:47,466 INFO L225 Difference]: With dead ends: 326 [2024-11-23 22:47:47,466 INFO L226 Difference]: Without dead ends: 204 [2024-11-23 22:47:47,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 231.7s TimeCoverageRelationStatistics Valid=932, Invalid=5547, Unknown=1, NotChecked=0, Total=6480 [2024-11-23 22:47:47,469 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:47:47,469 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 338 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1307 Invalid, 2 Unknown, 0 Unchecked, 23.1s Time] [2024-11-23 22:47:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-23 22:47:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2024-11-23 22:47:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 151 states have internal predecessors, (167), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-23 22:47:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 219 transitions. [2024-11-23 22:47:47,587 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 219 transitions. Word has length 78 [2024-11-23 22:47:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:47:47,587 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 219 transitions. [2024-11-23 22:47:47,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 15 states have call successors, (17), 5 states have call predecessors, (17), 3 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-23 22:47:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 219 transitions. [2024-11-23 22:47:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-23 22:47:47,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:47:47,590 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-23 22:47:47,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 22:47:47,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:47:47,790 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:47:47,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:47:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash -642047325, now seen corresponding path program 6 times [2024-11-23 22:47:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:47:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796311853] [2024-11-23 22:47:47,792 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 22:47:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:47:48,012 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-23 22:47:48,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:47:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-23 22:47:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:47:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796311853] [2024-11-23 22:47:48,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796311853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:47:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110113941] [2024-11-23 22:47:48,477 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 22:47:48,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:47:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:47:48,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:47:48,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75658269-9592-4f7f-b3bd-63936bcbb38c/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 22:47:54,980 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-23 22:47:54,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:47:54,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-23 22:47:54,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:47:55,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-23 22:47:55,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-23 22:47:55,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:47:55,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-23 22:47:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 30 proven. 176 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-23 22:47:57,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:48:17,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-11-23 22:48:17,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:48:17,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 91 [2024-11-23 22:48:18,676 INFO L349 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2024-11-23 22:48:18,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1864 treesize of output 1813 [2024-11-23 22:48:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 45 proven. 164 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-23 22:48:20,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110113941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:48:20,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:48:20,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 27, 35] total 63 [2024-11-23 22:48:20,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616023033] [2024-11-23 22:48:20,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:48:20,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-23 22:48:20,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:48:20,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-23 22:48:20,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=3389, Unknown=3, NotChecked=0, Total=3906 [2024-11-23 22:48:20,868 INFO L87 Difference]: Start difference. First operand 186 states and 219 transitions. Second operand has 63 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 61 states have internal predecessors, (134), 17 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2024-11-23 22:49:00,635 WARN L286 SmtUtils]: Spent 27.96s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:49:22,212 WARN L286 SmtUtils]: Spent 20.34s on a formula simplification. DAG size of input: 153 DAG size of output: 153 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:50:00,932 WARN L286 SmtUtils]: Spent 38.21s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:50:17,173 WARN L286 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 134 DAG size of output: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:50:18,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 22:50:32,413 WARN L286 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:51:14,082 WARN L286 SmtUtils]: Spent 40.12s on a formula simplification. DAG size of input: 144 DAG size of output: 144 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:51:50,674 WARN L286 SmtUtils]: Spent 30.38s on a formula simplification. DAG size of input: 140 DAG size of output: 140 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:52:09,106 WARN L286 SmtUtils]: Spent 13.89s on a formula simplification. DAG size of input: 117 DAG size of output: 117 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:52:31,031 WARN L286 SmtUtils]: Spent 21.45s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:52:49,675 WARN L286 SmtUtils]: Spent 10.37s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 22:53:02,589 WARN L286 SmtUtils]: Spent 12.54s on a formula simplification. DAG size of input: 125 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)