./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:39:18,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:39:18,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:39:18,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:39:18,210 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:39:18,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:39:18,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:39:18,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:39:18,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:39:18,237 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:39:18,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:39:18,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:39:18,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:39:18,239 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:39:18,240 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:39:18,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:39:18,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:39:18,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:39:18,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:39:18,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:39:18,243 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:39:18,244 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:39:18,244 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:39:18,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:39:18,245 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:39:18,245 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:39:18,246 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:39:18,246 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:39:18,247 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:39:18,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:39:18,247 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:39:18,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:39:18,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:39:18,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:39:18,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:39:18,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:39:18,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:39:18,249 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:39:18,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:39:18,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:39:18,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:39:18,250 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-11-28 20:39:18,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:39:18,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:39:18,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:39:18,495 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:39:18,495 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:39:18,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-11-28 20:39:21,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:39:21,354 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:39:21,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-11-28 20:39:21,360 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/data/b3cdedaa0/a6b571c9ca854819887d296180d01535/FLAGbf0fe211a [2023-11-28 20:39:21,371 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/data/b3cdedaa0/a6b571c9ca854819887d296180d01535 [2023-11-28 20:39:21,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:39:21,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:39:21,376 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:39:21,376 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:39:21,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:39:21,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,382 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f62f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21, skipping insertion in model container [2023-11-28 20:39:21,382 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:39:21,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:39:21,525 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:39:21,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:39:21,552 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:39:21,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21 WrapperNode [2023-11-28 20:39:21,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:39:21,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:39:21,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:39:21,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:39:21,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,583 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-28 20:39:21,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:39:21,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:39:21,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:39:21,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:39:21,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,595 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,608 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [1, 0]. [2023-11-28 20:39:21,608 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,620 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:39:21,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:39:21,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:39:21,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:39:21,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (1/1) ... [2023-11-28 20:39:21,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:39:21,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:21,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:39:21,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:39:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:39:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:39:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:39:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:39:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:39:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:39:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:39:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:39:21,774 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:39:21,776 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:39:21,931 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:39:21,962 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:39:21,963 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 20:39:21,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:21 BoogieIcfgContainer [2023-11-28 20:39:21,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:39:21,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:39:21,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:39:21,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:39:21,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:39:21" (1/3) ... [2023-11-28 20:39:21,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22661cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:21, skipping insertion in model container [2023-11-28 20:39:21,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:39:21" (2/3) ... [2023-11-28 20:39:21,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22661cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:39:21, skipping insertion in model container [2023-11-28 20:39:21,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:39:21" (3/3) ... [2023-11-28 20:39:21,973 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-11-28 20:39:21,995 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:39:21,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-28 20:39:22,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:39:22,042 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7af946e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:39:22,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-28 20:39:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-28 20:39:22,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-28 20:39:22,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:22,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2023-11-28 20:39:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973790714] [2023-11-28 20:39:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973790714] [2023-11-28 20:39:22,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973790714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:22,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453118388] [2023-11-28 20:39:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:39:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:39:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:22,337 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:22,388 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-28 20:39:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:39:22,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-28 20:39:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:22,398 INFO L225 Difference]: With dead ends: 28 [2023-11-28 20:39:22,398 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:39:22,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:22,403 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:22,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:39:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-28 20:39:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-28 20:39:22,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2023-11-28 20:39:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:22,447 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-28 20:39:22,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-28 20:39:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:39:22,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:39:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:39:22,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:22,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,450 INFO L85 PathProgramCache]: Analyzing trace with hash 96326476, now seen corresponding path program 1 times [2023-11-28 20:39:22,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843292114] [2023-11-28 20:39:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843292114] [2023-11-28 20:39:22,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843292114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:22,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:22,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:22,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23239502] [2023-11-28 20:39:22,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:22,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:39:22,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:22,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:39:22,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:22,532 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:22,577 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-28 20:39:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:39:22,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-28 20:39:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:22,579 INFO L225 Difference]: With dead ends: 43 [2023-11-28 20:39:22,579 INFO L226 Difference]: Without dead ends: 43 [2023-11-28 20:39:22,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:22,581 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:22,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-28 20:39:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2023-11-28 20:39:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-28 20:39:22,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2023-11-28 20:39:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:22,587 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-28 20:39:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-28 20:39:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:39:22,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:39:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:39:22,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:22,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash 96361891, now seen corresponding path program 1 times [2023-11-28 20:39:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290022487] [2023-11-28 20:39:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290022487] [2023-11-28 20:39:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290022487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:22,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:22,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:39:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662332455] [2023-11-28 20:39:22,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:22,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:39:22,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:22,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:39:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:39:22,697 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:22,775 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-11-28 20:39:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:39:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-28 20:39:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:22,776 INFO L225 Difference]: With dead ends: 46 [2023-11-28 20:39:22,776 INFO L226 Difference]: Without dead ends: 46 [2023-11-28 20:39:22,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:39:22,778 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:22,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-28 20:39:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2023-11-28 20:39:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-28 20:39:22,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2023-11-28 20:39:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:22,785 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-28 20:39:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-28 20:39:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:39:22,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:39:22,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:39:22,786 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:22,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2023-11-28 20:39:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114391441] [2023-11-28 20:39:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114391441] [2023-11-28 20:39:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114391441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:22,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686541872] [2023-11-28 20:39:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:39:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:22,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:39:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:39:22,865 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:22,899 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-28 20:39:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:39:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-28 20:39:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:22,901 INFO L225 Difference]: With dead ends: 25 [2023-11-28 20:39:22,901 INFO L226 Difference]: Without dead ends: 25 [2023-11-28 20:39:22,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:39:22,903 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:22,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:22,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-28 20:39:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-28 20:39:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-28 20:39:22,908 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2023-11-28 20:39:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:22,908 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-28 20:39:22,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-28 20:39:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:39:22,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:22,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:39:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:39:22,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:22,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2023-11-28 20:39:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965958504] [2023-11-28 20:39:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:22,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965958504] [2023-11-28 20:39:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965958504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:23,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:39:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518102298] [2023-11-28 20:39:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:23,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:39:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:39:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:39:23,036 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:23,093 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-28 20:39:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:39:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-28 20:39:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:23,095 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:39:23,095 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:39:23,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:39:23,096 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:23,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:39:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-28 20:39:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-28 20:39:23,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2023-11-28 20:39:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-28 20:39:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-28 20:39:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:39:23,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:23,102 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-28 20:39:23,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:39:23,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:23,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2023-11-28 20:39:23,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:23,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135063571] [2023-11-28 20:39:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135063571] [2023-11-28 20:39:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135063571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141569589] [2023-11-28 20:39:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:23,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:23,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:39:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:39:23,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141569589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:23,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-28 20:39:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419119569] [2023-11-28 20:39:23,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:39:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:39:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:39:23,303 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:23,377 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-28 20:39:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:39:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 20:39:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:23,380 INFO L225 Difference]: With dead ends: 40 [2023-11-28 20:39:23,380 INFO L226 Difference]: Without dead ends: 40 [2023-11-28 20:39:23,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:39:23,382 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:23,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-28 20:39:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-11-28 20:39:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-11-28 20:39:23,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 7 [2023-11-28 20:39:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:23,388 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-11-28 20:39:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-11-28 20:39:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-28 20:39:23,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:23,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:23,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-28 20:39:23,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:39:23,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:23,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917050, now seen corresponding path program 1 times [2023-11-28 20:39:23,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:23,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721320147] [2023-11-28 20:39:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:23,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721320147] [2023-11-28 20:39:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721320147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510526036] [2023-11-28 20:39:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:23,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:23,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:23,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:23,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:39:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:23,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:39:23,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510526036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:23,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:23,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-28 20:39:23,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258619145] [2023-11-28 20:39:23,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:23,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:39:23,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:23,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:39:23,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:39:23,808 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:23,946 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-11-28 20:39:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:39:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-28 20:39:23,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:23,947 INFO L225 Difference]: With dead ends: 61 [2023-11-28 20:39:23,947 INFO L226 Difference]: Without dead ends: 61 [2023-11-28 20:39:23,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:39:23,949 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:23,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-28 20:39:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2023-11-28 20:39:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-28 20:39:23,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2023-11-28 20:39:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:23,954 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-28 20:39:23,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-28 20:39:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-28 20:39:23,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:23,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-28 20:39:23,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:39:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:24,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:24,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917194, now seen corresponding path program 1 times [2023-11-28 20:39:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:24,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614068772] [2023-11-28 20:39:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:24,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614068772] [2023-11-28 20:39:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614068772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981450398] [2023-11-28 20:39:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:24,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:24,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:24,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:39:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:24,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:39:24,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:24,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:39:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:24,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981450398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:24,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-28 20:39:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154086961] [2023-11-28 20:39:24,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:39:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:39:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:39:24,509 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:24,637 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-28 20:39:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:39:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-28 20:39:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:24,638 INFO L225 Difference]: With dead ends: 36 [2023-11-28 20:39:24,638 INFO L226 Difference]: Without dead ends: 36 [2023-11-28 20:39:24,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:39:24,640 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:24,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-28 20:39:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-11-28 20:39:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-28 20:39:24,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 8 [2023-11-28 20:39:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:24,644 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-28 20:39:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-28 20:39:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:39:24,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:24,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 20:39:24,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:39:24,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:24,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:24,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash 87024195, now seen corresponding path program 2 times [2023-11-28 20:39:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968164184] [2023-11-28 20:39:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:24,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:39:24,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:24,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968164184] [2023-11-28 20:39:24,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968164184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:24,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:24,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:39:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540449662] [2023-11-28 20:39:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:39:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:39:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:39:24,948 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:24,968 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-28 20:39:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:39:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 20:39:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:24,970 INFO L225 Difference]: With dead ends: 32 [2023-11-28 20:39:24,970 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:39:24,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:39:24,971 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:24,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:39:24,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-28 20:39:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-28 20:39:24,974 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2023-11-28 20:39:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:24,975 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-28 20:39:24,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-28 20:39:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:39:24,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:24,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-11-28 20:39:24,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:39:24,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:24,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash 87024196, now seen corresponding path program 1 times [2023-11-28 20:39:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509302162] [2023-11-28 20:39:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:25,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509302162] [2023-11-28 20:39:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509302162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:25,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:39:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:39:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616398141] [2023-11-28 20:39:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:39:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:39:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:25,104 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:25,135 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-11-28 20:39:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:39:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 20:39:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:25,136 INFO L225 Difference]: With dead ends: 51 [2023-11-28 20:39:25,136 INFO L226 Difference]: Without dead ends: 51 [2023-11-28 20:39:25,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:39:25,137 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:25,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-28 20:39:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-28 20:39:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-28 20:39:25,142 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 11 [2023-11-28 20:39:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:25,142 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-28 20:39:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-28 20:39:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-28 20:39:25,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:25,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:25,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:39:25,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:25,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1284463060, now seen corresponding path program 1 times [2023-11-28 20:39:25,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:25,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966623077] [2023-11-28 20:39:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966623077] [2023-11-28 20:39:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966623077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551738507] [2023-11-28 20:39:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:25,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:25,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:39:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:25,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:39:25,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:25,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:25,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-28 20:39:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551738507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:25,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-28 20:39:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434378008] [2023-11-28 20:39:25,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:39:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:39:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:39:25,463 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:25,544 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-28 20:39:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:39:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-28 20:39:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:25,545 INFO L225 Difference]: With dead ends: 53 [2023-11-28 20:39:25,545 INFO L226 Difference]: Without dead ends: 53 [2023-11-28 20:39:25,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:39:25,546 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:25,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-28 20:39:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-28 20:39:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-11-28 20:39:25,551 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2023-11-28 20:39:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:25,551 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-11-28 20:39:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-11-28 20:39:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 20:39:25,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:25,552 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2023-11-28 20:39:25,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:39:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:25,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:25,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1343436067, now seen corresponding path program 2 times [2023-11-28 20:39:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887030021] [2023-11-28 20:39:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:25,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:25,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887030021] [2023-11-28 20:39:25,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887030021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:25,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413770586] [2023-11-28 20:39:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:25,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:25,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:25,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:39:25,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:25,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:25,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:39:25,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:25,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:39:25,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413770586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:25,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:39:25,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-28 20:39:25,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877873946] [2023-11-28 20:39:25,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:39:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:39:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:39:25,994 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:26,070 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-28 20:39:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:39:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-28 20:39:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:26,071 INFO L225 Difference]: With dead ends: 45 [2023-11-28 20:39:26,071 INFO L226 Difference]: Without dead ends: 45 [2023-11-28 20:39:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:39:26,072 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:26,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:39:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-28 20:39:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-28 20:39:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-28 20:39:26,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2023-11-28 20:39:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-28 20:39:26,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-28 20:39:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-28 20:39:26,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:26,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:26,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:39:26,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:26,281 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:26,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:26,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1713387055, now seen corresponding path program 1 times [2023-11-28 20:39:26,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:26,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553450925] [2023-11-28 20:39:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:26,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:26,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553450925] [2023-11-28 20:39:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553450925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124066328] [2023-11-28 20:39:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:26,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:26,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:26,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:26,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:39:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:26,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:39:26,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:26,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124066328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:26,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-11-28 20:39:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173994183] [2023-11-28 20:39:26,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:39:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:39:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:39:26,608 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:26,806 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-11-28 20:39:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:39:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-28 20:39:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:26,808 INFO L225 Difference]: With dead ends: 103 [2023-11-28 20:39:26,808 INFO L226 Difference]: Without dead ends: 103 [2023-11-28 20:39:26,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:39:26,809 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:26,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 38 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-28 20:39:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2023-11-28 20:39:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.329268292682927) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2023-11-28 20:39:26,816 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 17 [2023-11-28 20:39:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:26,816 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2023-11-28 20:39:26,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2023-11-28 20:39:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-28 20:39:26,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:26,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1] [2023-11-28 20:39:26,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:39:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:39:27,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:27,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1817303157, now seen corresponding path program 1 times [2023-11-28 20:39:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171261962] [2023-11-28 20:39:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171261962] [2023-11-28 20:39:27,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171261962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:27,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236050490] [2023-11-28 20:39:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:27,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:27,190 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:39:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:27,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:39:27,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:27,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236050490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:27,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-28 20:39:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757930493] [2023-11-28 20:39:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 20:39:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 20:39:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:39:27,426 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:27,579 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2023-11-28 20:39:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:39:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-28 20:39:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:27,580 INFO L225 Difference]: With dead ends: 89 [2023-11-28 20:39:27,580 INFO L226 Difference]: Without dead ends: 89 [2023-11-28 20:39:27,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:39:27,582 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 14 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-28 20:39:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-28 20:39:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 86 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-11-28 20:39:27,587 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 21 [2023-11-28 20:39:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:27,587 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-11-28 20:39:27,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-11-28 20:39:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-28 20:39:27,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:27,588 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1] [2023-11-28 20:39:27,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:39:27,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:39:27,793 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:27,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1209637900, now seen corresponding path program 2 times [2023-11-28 20:39:27,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297851306] [2023-11-28 20:39:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:39:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297851306] [2023-11-28 20:39:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297851306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920152977] [2023-11-28 20:39:28,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:28,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:28,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:28,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:28,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:39:28,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:28,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:28,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:39:28,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:28,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-28 20:39:28,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:39:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:39:28,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:39:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920152977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:28,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:28,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 2] total 8 [2023-11-28 20:39:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389428733] [2023-11-28 20:39:28,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:39:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:39:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:39:28,405 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:28,499 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2023-11-28 20:39:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:39:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-28 20:39:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:28,501 INFO L225 Difference]: With dead ends: 110 [2023-11-28 20:39:28,501 INFO L226 Difference]: Without dead ends: 110 [2023-11-28 20:39:28,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:39:28,502 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:28,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-28 20:39:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-11-28 20:39:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 103 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2023-11-28 20:39:28,508 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 24 [2023-11-28 20:39:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:28,508 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2023-11-28 20:39:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2023-11-28 20:39:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-28 20:39:28,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:28,509 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1] [2023-11-28 20:39:28,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:28,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:28,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:28,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1474307132, now seen corresponding path program 1 times [2023-11-28 20:39:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882838672] [2023-11-28 20:39:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-28 20:39:28,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:28,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882838672] [2023-11-28 20:39:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882838672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:28,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454052547] [2023-11-28 20:39:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:28,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:28,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:28,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:39:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:28,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:39:28,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:39:29,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:39:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454052547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:29,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:29,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2023-11-28 20:39:29,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413448747] [2023-11-28 20:39:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:39:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:39:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:39:29,124 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:29,307 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2023-11-28 20:39:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:39:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-28 20:39:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:29,309 INFO L225 Difference]: With dead ends: 104 [2023-11-28 20:39:29,309 INFO L226 Difference]: Without dead ends: 104 [2023-11-28 20:39:29,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:39:29,310 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:29,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-28 20:39:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-11-28 20:39:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2023-11-28 20:39:29,314 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 26 [2023-11-28 20:39:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:29,314 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2023-11-28 20:39:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2023-11-28 20:39:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-28 20:39:29,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:29,316 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 1, 1] [2023-11-28 20:39:29,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:39:29,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:39:29,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:29,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1216344948, now seen corresponding path program 2 times [2023-11-28 20:39:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:29,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164131688] [2023-11-28 20:39:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:29,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 80 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:39:29,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164131688] [2023-11-28 20:39:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164131688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13469033] [2023-11-28 20:39:29,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:29,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:29,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:29,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:29,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:39:29,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:29,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:39:29,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:39:30,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:39:30,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13469033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:30,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:30,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 20 [2023-11-28 20:39:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984967676] [2023-11-28 20:39:30,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:30,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:39:30,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:39:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:39:30,213 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:30,543 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2023-11-28 20:39:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:39:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-28 20:39:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:30,545 INFO L225 Difference]: With dead ends: 148 [2023-11-28 20:39:30,545 INFO L226 Difference]: Without dead ends: 148 [2023-11-28 20:39:30,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:39:30,546 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:30,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:39:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-28 20:39:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2023-11-28 20:39:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 130 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2023-11-28 20:39:30,551 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 39 [2023-11-28 20:39:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:30,551 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2023-11-28 20:39:30,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2023-11-28 20:39:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-28 20:39:30,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:30,553 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 3, 3, 3, 1, 1] [2023-11-28 20:39:30,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:39:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:39:30,757 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -278353659, now seen corresponding path program 3 times [2023-11-28 20:39:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993232449] [2023-11-28 20:39:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 26 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:30,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993232449] [2023-11-28 20:39:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993232449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033912986] [2023-11-28 20:39:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:30,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:30,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:39:31,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 20:39:31,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:31,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:39:31,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 26 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:31,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 26 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033912986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:31,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-28 20:39:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682323357] [2023-11-28 20:39:31,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:31,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 20:39:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 20:39:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:39:31,184 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:31,643 INFO L93 Difference]: Finished difference Result 182 states and 217 transitions. [2023-11-28 20:39:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:39:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-28 20:39:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:31,645 INFO L225 Difference]: With dead ends: 182 [2023-11-28 20:39:31,645 INFO L226 Difference]: Without dead ends: 182 [2023-11-28 20:39:31,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:39:31,646 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:31,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 65 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-28 20:39:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2023-11-28 20:39:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.28125) internal successors, (205), 164 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 205 transitions. [2023-11-28 20:39:31,652 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 205 transitions. Word has length 55 [2023-11-28 20:39:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:31,652 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 205 transitions. [2023-11-28 20:39:31,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 205 transitions. [2023-11-28 20:39:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-28 20:39:31,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:31,654 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:31,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:39:31,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:39:31,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:31,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash -250497569, now seen corresponding path program 2 times [2023-11-28 20:39:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:31,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588851310] [2023-11-28 20:39:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 117 proven. 88 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-28 20:39:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588851310] [2023-11-28 20:39:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588851310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044233325] [2023-11-28 20:39:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:32,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:32,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:32,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:39:32,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:39:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:32,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:39:32,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:32,838 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (let ((.cse0 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_17| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_26|))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| .cse0) |v_ULTIMATE.start_main_~#mask~0#1.base_17|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)) (<= 1 .cse0)))) is different from true [2023-11-28 20:39:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-28 20:39:32,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:39:32,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044233325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:39:32,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:39:32,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-11-28 20:39:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837200383] [2023-11-28 20:39:32,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:39:32,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:39:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:39:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-11-28 20:39:32,842 INFO L87 Difference]: Start difference. First operand 165 states and 205 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:32,866 INFO L93 Difference]: Finished difference Result 166 states and 205 transitions. [2023-11-28 20:39:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:39:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-28 20:39:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:32,868 INFO L225 Difference]: With dead ends: 166 [2023-11-28 20:39:32,868 INFO L226 Difference]: Without dead ends: 165 [2023-11-28 20:39:32,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=100, Unknown=1, NotChecked=20, Total=156 [2023-11-28 20:39:32,869 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:32,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2023-11-28 20:39:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-28 20:39:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-11-28 20:39:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.25625) internal successors, (201), 164 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 201 transitions. [2023-11-28 20:39:32,873 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 201 transitions. Word has length 56 [2023-11-28 20:39:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:32,874 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 201 transitions. [2023-11-28 20:39:32,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 201 transitions. [2023-11-28 20:39:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-28 20:39:32,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:32,875 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 3, 3, 3, 1, 1] [2023-11-28 20:39:32,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:39:33,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:33,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:33,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash -39028783, now seen corresponding path program 1 times [2023-11-28 20:39:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:33,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934715709] [2023-11-28 20:39:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:33,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:33,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934715709] [2023-11-28 20:39:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934715709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:33,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26440300] [2023-11-28 20:39:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:33,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:33,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:39:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:33,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:39:33,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:33,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:39:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:33,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-28 20:39:34,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26440300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:34,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:34,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-28 20:39:34,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495609753] [2023-11-28 20:39:34,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:34,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:39:34,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:34,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:39:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:39:34,109 INFO L87 Difference]: Start difference. First operand 165 states and 201 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:34,401 INFO L93 Difference]: Finished difference Result 179 states and 205 transitions. [2023-11-28 20:39:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:39:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-28 20:39:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:34,402 INFO L225 Difference]: With dead ends: 179 [2023-11-28 20:39:34,403 INFO L226 Difference]: Without dead ends: 179 [2023-11-28 20:39:34,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:39:34,404 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:34,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-28 20:39:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2023-11-28 20:39:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.191358024691358) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2023-11-28 20:39:34,409 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 56 [2023-11-28 20:39:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:34,410 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2023-11-28 20:39:34,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2023-11-28 20:39:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-28 20:39:34,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:34,411 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:34,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:39:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:34,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:34,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 824513292, now seen corresponding path program 1 times [2023-11-28 20:39:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:34,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991371411] [2023-11-28 20:39:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:34,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 117 proven. 88 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-28 20:39:34,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:34,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991371411] [2023-11-28 20:39:34,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991371411] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:34,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312052796] [2023-11-28 20:39:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:34,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:34,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:34,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:39:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:34,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:39:34,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 135 proven. 70 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-28 20:39:35,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 135 proven. 70 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-28 20:39:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312052796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:35,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:35,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2023-11-28 20:39:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471008589] [2023-11-28 20:39:35,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:39:35,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:39:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:39:35,217 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:35,530 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2023-11-28 20:39:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:39:35,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-28 20:39:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:35,532 INFO L225 Difference]: With dead ends: 134 [2023-11-28 20:39:35,532 INFO L226 Difference]: Without dead ends: 134 [2023-11-28 20:39:35,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:39:35,533 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:35,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 24 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:39:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-28 20:39:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2023-11-28 20:39:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-11-28 20:39:35,537 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 57 [2023-11-28 20:39:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:35,537 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-11-28 20:39:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-11-28 20:39:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-28 20:39:35,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:35,538 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:35,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:39:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 20:39:35,744 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:35,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1631981054, now seen corresponding path program 2 times [2023-11-28 20:39:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:35,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061555897] [2023-11-28 20:39:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 82 proven. 193 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-28 20:39:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061555897] [2023-11-28 20:39:36,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061555897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183659200] [2023-11-28 20:39:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:36,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:36,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:36,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:36,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:39:36,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:36,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:36,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:39:36,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 121 proven. 154 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-28 20:39:36,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 121 proven. 154 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-28 20:39:36,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183659200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:36,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:36,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2023-11-28 20:39:36,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599122995] [2023-11-28 20:39:36,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:36,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:39:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:39:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:39:36,648 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:37,045 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2023-11-28 20:39:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 20:39:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-28 20:39:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:37,046 INFO L225 Difference]: With dead ends: 135 [2023-11-28 20:39:37,046 INFO L226 Difference]: Without dead ends: 135 [2023-11-28 20:39:37,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:39:37,048 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:37,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 20 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:39:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-28 20:39:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-11-28 20:39:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.171875) internal successors, (150), 132 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2023-11-28 20:39:37,052 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 63 [2023-11-28 20:39:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:37,053 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2023-11-28 20:39:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2023-11-28 20:39:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 20:39:37,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:37,054 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:37,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:39:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 20:39:37,260 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:37,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1140904957, now seen corresponding path program 3 times [2023-11-28 20:39:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839311859] [2023-11-28 20:39:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 53 proven. 232 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-28 20:39:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:37,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839311859] [2023-11-28 20:39:37,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839311859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:37,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302183369] [2023-11-28 20:39:37,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:37,609 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:37,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:39:37,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:39:37,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:37,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 20:39:37,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:37,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:39:37,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:39:37,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-28 20:39:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-11-28 20:39:37,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-11-28 20:39:38,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302183369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:38,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:38,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 3, 3] total 16 [2023-11-28 20:39:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543464048] [2023-11-28 20:39:38,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:38,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:39:38,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:39:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:39:38,190 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:38,439 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2023-11-28 20:39:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:39:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 20:39:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:38,441 INFO L225 Difference]: With dead ends: 179 [2023-11-28 20:39:38,441 INFO L226 Difference]: Without dead ends: 179 [2023-11-28 20:39:38,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:39:38,442 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 159 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:38,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 37 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:39:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-28 20:39:38,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2023-11-28 20:39:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.1785714285714286) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2023-11-28 20:39:38,447 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 66 [2023-11-28 20:39:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:38,447 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2023-11-28 20:39:38,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2023-11-28 20:39:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-28 20:39:38,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:38,449 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 3, 3, 3, 1, 1] [2023-11-28 20:39:38,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:39:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-28 20:39:38,655 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:38,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 188687013, now seen corresponding path program 4 times [2023-11-28 20:39:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271812845] [2023-11-28 20:39:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 395 proven. 185 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-28 20:39:39,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271812845] [2023-11-28 20:39:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271812845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958676857] [2023-11-28 20:39:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:39:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:39,058 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:39,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:39:39,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:39:39,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:39,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:39:39,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 164 proven. 423 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:39:39,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 164 proven. 423 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-28 20:39:39,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958676857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:39,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:39,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 43 [2023-11-28 20:39:39,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295042724] [2023-11-28 20:39:39,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:39,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-28 20:39:39,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-28 20:39:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 20:39:39,752 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:40,909 INFO L93 Difference]: Finished difference Result 258 states and 286 transitions. [2023-11-28 20:39:40,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-28 20:39:40,910 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-28 20:39:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:40,912 INFO L225 Difference]: With dead ends: 258 [2023-11-28 20:39:40,912 INFO L226 Difference]: Without dead ends: 258 [2023-11-28 20:39:40,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1964, Invalid=7738, Unknown=0, NotChecked=0, Total=9702 [2023-11-28 20:39:40,916 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 154 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:40,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 25 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:39:40,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-28 20:39:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 236. [2023-11-28 20:39:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.1428571428571428) internal successors, (264), 235 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 264 transitions. [2023-11-28 20:39:40,923 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 264 transitions. Word has length 73 [2023-11-28 20:39:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:40,923 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 264 transitions. [2023-11-28 20:39:40,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.511627906976744) internal successors, (151), 43 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 264 transitions. [2023-11-28 20:39:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-28 20:39:40,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:40,925 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:40,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:41,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:41,132 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:41,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -44970104, now seen corresponding path program 1 times [2023-11-28 20:39:41,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:41,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375684343] [2023-11-28 20:39:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-11-28 20:39:41,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375684343] [2023-11-28 20:39:41,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375684343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349893740] [2023-11-28 20:39:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:41,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:41,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:41,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:41,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:39:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:41,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:39:41,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-28 20:39:41,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 9 proven. 309 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-28 20:39:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349893740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:41,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:41,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 23 [2023-11-28 20:39:41,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920155659] [2023-11-28 20:39:41,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:41,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:39:41,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:41,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:39:41,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:39:41,851 INFO L87 Difference]: Start difference. First operand 236 states and 264 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:42,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:42,397 INFO L93 Difference]: Finished difference Result 299 states and 326 transitions. [2023-11-28 20:39:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:39:42,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-28 20:39:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:42,399 INFO L225 Difference]: With dead ends: 299 [2023-11-28 20:39:42,399 INFO L226 Difference]: Without dead ends: 299 [2023-11-28 20:39:42,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:39:42,400 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:42,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 110 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:39:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-28 20:39:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 289. [2023-11-28 20:39:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.147887323943662) internal successors, (326), 288 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 326 transitions. [2023-11-28 20:39:42,413 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 326 transitions. Word has length 76 [2023-11-28 20:39:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:42,413 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 326 transitions. [2023-11-28 20:39:42,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 326 transitions. [2023-11-28 20:39:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-28 20:39:42,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:42,415 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 1, 1] [2023-11-28 20:39:42,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:39:42,615 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:42,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 895084573, now seen corresponding path program 3 times [2023-11-28 20:39:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376334687] [2023-11-28 20:39:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 707 proven. 138 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-28 20:39:42,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:42,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376334687] [2023-11-28 20:39:42,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376334687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:42,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115215533] [2023-11-28 20:39:42,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:42,980 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:42,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:39:43,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:39:43,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:43,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:39:43,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:43,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-28 20:39:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:39:43,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:39:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 5 proven. 349 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2023-11-28 20:39:43,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2023-11-28 20:39:44,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115215533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:44,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:44,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 26 [2023-11-28 20:39:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727975297] [2023-11-28 20:39:44,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:44,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:39:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:39:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:39:44,491 INFO L87 Difference]: Start difference. First operand 289 states and 326 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:46,190 INFO L93 Difference]: Finished difference Result 288 states and 315 transitions. [2023-11-28 20:39:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-28 20:39:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-11-28 20:39:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:46,193 INFO L225 Difference]: With dead ends: 288 [2023-11-28 20:39:46,193 INFO L226 Difference]: Without dead ends: 288 [2023-11-28 20:39:46,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=758, Invalid=2664, Unknown=0, NotChecked=0, Total=3422 [2023-11-28 20:39:46,195 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 101 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:46,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 17 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:39:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-28 20:39:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2023-11-28 20:39:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 284 states have (on average 1.1091549295774648) internal successors, (315), 287 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 315 transitions. [2023-11-28 20:39:46,203 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 315 transitions. Word has length 97 [2023-11-28 20:39:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:46,203 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 315 transitions. [2023-11-28 20:39:46,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 315 transitions. [2023-11-28 20:39:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-28 20:39:46,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:46,206 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 8, 8, 8, 1, 1] [2023-11-28 20:39:46,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:46,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:39:46,411 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:46,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1380156551, now seen corresponding path program 5 times [2023-11-28 20:39:46,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:46,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790624738] [2023-11-28 20:39:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 2643 proven. 355 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2023-11-28 20:39:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790624738] [2023-11-28 20:39:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790624738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817430291] [2023-11-28 20:39:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:39:47,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:47,354 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:47,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:39:47,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-11-28 20:39:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:47,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:39:47,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 2582 proven. 485 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-11-28 20:39:48,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3992 backedges. 2710 proven. 357 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-11-28 20:39:48,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817430291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:48,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:48,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 42 [2023-11-28 20:39:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167990004] [2023-11-28 20:39:48,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-28 20:39:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-28 20:39:48,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2023-11-28 20:39:48,558 INFO L87 Difference]: Start difference. First operand 288 states and 315 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:49,276 INFO L93 Difference]: Finished difference Result 288 states and 310 transitions. [2023-11-28 20:39:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-28 20:39:49,276 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-11-28 20:39:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:49,278 INFO L225 Difference]: With dead ends: 288 [2023-11-28 20:39:49,278 INFO L226 Difference]: Without dead ends: 288 [2023-11-28 20:39:49,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 334 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1012, Invalid=3680, Unknown=0, NotChecked=0, Total=4692 [2023-11-28 20:39:49,279 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:49,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:39:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-28 20:39:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2023-11-28 20:39:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 284 states have (on average 1.091549295774648) internal successors, (310), 287 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 310 transitions. [2023-11-28 20:39:49,284 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 310 transitions. Word has length 180 [2023-11-28 20:39:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:49,284 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 310 transitions. [2023-11-28 20:39:49,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 310 transitions. [2023-11-28 20:39:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-28 20:39:49,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:49,286 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 9, 8, 8, 8, 1, 1] [2023-11-28 20:39:49,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:39:49,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 20:39:49,486 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:49,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1401844468, now seen corresponding path program 6 times [2023-11-28 20:39:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131623289] [2023-11-28 20:39:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 3024 proven. 261 refuted. 0 times theorem prover too weak. 1178 trivial. 0 not checked. [2023-11-28 20:39:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131623289] [2023-11-28 20:39:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131623289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439183346] [2023-11-28 20:39:50,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:39:50,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:50,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:50,232 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:50,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:39:51,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-11-28 20:39:51,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:51,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 20:39:51,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 2153 proven. 298 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2023-11-28 20:39:51,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 2153 proven. 298 refuted. 0 times theorem prover too weak. 2012 trivial. 0 not checked. [2023-11-28 20:39:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439183346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:52,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:52,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 62 [2023-11-28 20:39:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793707006] [2023-11-28 20:39:52,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:52,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-28 20:39:52,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:52,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-28 20:39:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=3222, Unknown=0, NotChecked=0, Total=3782 [2023-11-28 20:39:52,235 INFO L87 Difference]: Start difference. First operand 288 states and 310 transitions. Second operand has 62 states, 62 states have (on average 2.870967741935484) internal successors, (178), 62 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:54,572 INFO L93 Difference]: Finished difference Result 447 states and 470 transitions. [2023-11-28 20:39:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-28 20:39:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.870967741935484) internal successors, (178), 62 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2023-11-28 20:39:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:54,574 INFO L225 Difference]: With dead ends: 447 [2023-11-28 20:39:54,574 INFO L226 Difference]: Without dead ends: 447 [2023-11-28 20:39:54,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3049, Invalid=15857, Unknown=0, NotChecked=0, Total=18906 [2023-11-28 20:39:54,579 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 433 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:54,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 55 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:39:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-28 20:39:54,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 440. [2023-11-28 20:39:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 436 states have (on average 1.061926605504587) internal successors, (463), 439 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 463 transitions. [2023-11-28 20:39:54,588 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 463 transitions. Word has length 189 [2023-11-28 20:39:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:54,588 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 463 transitions. [2023-11-28 20:39:54,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.870967741935484) internal successors, (178), 62 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 463 transitions. [2023-11-28 20:39:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-28 20:39:54,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:54,591 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 9, 8, 8, 8, 1, 1] [2023-11-28 20:39:54,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:39:54,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:39:54,792 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:54,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash -329151161, now seen corresponding path program 7 times [2023-11-28 20:39:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342394136] [2023-11-28 20:39:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:54,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 3360 proven. 401 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2023-11-28 20:39:55,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342394136] [2023-11-28 20:39:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342394136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744756671] [2023-11-28 20:39:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:39:55,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:55,666 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:55,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:39:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:55,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:39:55,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 2767 proven. 1070 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2023-11-28 20:39:56,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 2767 proven. 1070 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2023-11-28 20:39:56,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744756671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:56,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:56,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 39 [2023-11-28 20:39:56,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124138437] [2023-11-28 20:39:56,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:56,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-28 20:39:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-28 20:39:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2023-11-28 20:39:56,378 INFO L87 Difference]: Start difference. First operand 440 states and 463 transitions. Second operand has 39 states, 39 states have (on average 3.6666666666666665) internal successors, (143), 39 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:57,084 INFO L93 Difference]: Finished difference Result 309 states and 321 transitions. [2023-11-28 20:39:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-28 20:39:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6666666666666665) internal successors, (143), 39 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2023-11-28 20:39:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:57,087 INFO L225 Difference]: With dead ends: 309 [2023-11-28 20:39:57,087 INFO L226 Difference]: Without dead ends: 309 [2023-11-28 20:39:57,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1069, Invalid=3901, Unknown=0, NotChecked=0, Total=4970 [2023-11-28 20:39:57,089 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:57,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:39:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-28 20:39:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2023-11-28 20:39:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 304 states have (on average 1.055921052631579) internal successors, (321), 307 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 321 transitions. [2023-11-28 20:39:57,095 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 321 transitions. Word has length 204 [2023-11-28 20:39:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:57,096 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 321 transitions. [2023-11-28 20:39:57,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6666666666666665) internal successors, (143), 39 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 321 transitions. [2023-11-28 20:39:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-28 20:39:57,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:57,097 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 10, 9, 9, 9, 1, 1] [2023-11-28 20:39:57,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:39:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:39:57,298 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:39:57,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1024455703, now seen corresponding path program 8 times [2023-11-28 20:39:57,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244356717] [2023-11-28 20:39:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:57,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6714 backedges. 4625 proven. 648 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2023-11-28 20:39:58,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:58,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244356717] [2023-11-28 20:39:58,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244356717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:58,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302061044] [2023-11-28 20:39:58,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:39:58,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:58,265 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:58,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:39:58,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:39:58,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:58,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:39:58,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6714 backedges. 4763 proven. 1030 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2023-11-28 20:39:58,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6714 backedges. 4763 proven. 1030 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2023-11-28 20:39:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302061044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:59,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 46 [2023-11-28 20:39:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352135782] [2023-11-28 20:39:59,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 20:39:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 20:39:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1706, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 20:39:59,303 INFO L87 Difference]: Start difference. First operand 308 states and 321 transitions. Second operand has 46 states, 46 states have (on average 3.739130434782609) internal successors, (172), 46 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:00,999 INFO L93 Difference]: Finished difference Result 310 states and 317 transitions. [2023-11-28 20:40:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 20:40:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.739130434782609) internal successors, (172), 46 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2023-11-28 20:40:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:01,001 INFO L225 Difference]: With dead ends: 310 [2023-11-28 20:40:01,001 INFO L226 Difference]: Without dead ends: 310 [2023-11-28 20:40:01,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 428 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1772, Invalid=7734, Unknown=0, NotChecked=0, Total=9506 [2023-11-28 20:40:01,002 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 105 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:01,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 22 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 20:40:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-28 20:40:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2023-11-28 20:40:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 304 states have (on average 1.042763157894737) internal successors, (317), 307 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 317 transitions. [2023-11-28 20:40:01,008 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 317 transitions. Word has length 229 [2023-11-28 20:40:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:01,008 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 317 transitions. [2023-11-28 20:40:01,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.739130434782609) internal successors, (172), 46 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 317 transitions. [2023-11-28 20:40:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-11-28 20:40:01,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:01,009 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 10, 9, 9, 9, 1, 1] [2023-11-28 20:40:01,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:40:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:01,210 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:01,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -792908452, now seen corresponding path program 9 times [2023-11-28 20:40:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130731678] [2023-11-28 20:40:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:01,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6914 backedges. 1827 proven. 155 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:01,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:01,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130731678] [2023-11-28 20:40:01,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130731678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:01,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691706258] [2023-11-28 20:40:01,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:40:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:01,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:01,670 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:01,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:40:01,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-28 20:40:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:01,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 20:40:01,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6914 backedges. 1827 proven. 155 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:02,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6914 backedges. 1827 proven. 155 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:02,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691706258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:02,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:02,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-28 20:40:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693560205] [2023-11-28 20:40:02,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 20:40:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:02,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 20:40:02,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:40:02,289 INFO L87 Difference]: Start difference. First operand 308 states and 317 transitions. Second operand has 25 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:06,905 INFO L93 Difference]: Finished difference Result 366 states and 387 transitions. [2023-11-28 20:40:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 20:40:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2023-11-28 20:40:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:06,907 INFO L225 Difference]: With dead ends: 366 [2023-11-28 20:40:06,907 INFO L226 Difference]: Without dead ends: 366 [2023-11-28 20:40:06,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:40:06,908 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 177 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:06,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 114 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:40:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-11-28 20:40:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 343. [2023-11-28 20:40:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 339 states have (on average 1.1061946902654867) internal successors, (375), 342 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 375 transitions. [2023-11-28 20:40:06,916 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 375 transitions. Word has length 232 [2023-11-28 20:40:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:06,916 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 375 transitions. [2023-11-28 20:40:06,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 375 transitions. [2023-11-28 20:40:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-28 20:40:06,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:06,918 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 10, 9, 9, 9, 1, 1] [2023-11-28 20:40:06,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:40:07,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-28 20:40:07,118 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:07,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1189641818, now seen corresponding path program 2 times [2023-11-28 20:40:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:07,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503769296] [2023-11-28 20:40:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:07,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:07,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:07,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503769296] [2023-11-28 20:40:07,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503769296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:07,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998685037] [2023-11-28 20:40:07,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:40:07,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:07,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:07,844 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:07,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:40:08,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:40:08,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:08,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-28 20:40:08,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:08,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:40:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:09,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6978 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-28 20:40:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998685037] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:10,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:10,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-11-28 20:40:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901096944] [2023-11-28 20:40:10,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-28 20:40:10,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-28 20:40:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:40:10,252 INFO L87 Difference]: Start difference. First operand 343 states and 375 transitions. Second operand has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:11,378 INFO L93 Difference]: Finished difference Result 356 states and 377 transitions. [2023-11-28 20:40:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 20:40:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2023-11-28 20:40:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:11,380 INFO L225 Difference]: With dead ends: 356 [2023-11-28 20:40:11,380 INFO L226 Difference]: Without dead ends: 356 [2023-11-28 20:40:11,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=824, Invalid=2716, Unknown=0, NotChecked=0, Total=3540 [2023-11-28 20:40:11,381 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:11,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 72 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:40:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-28 20:40:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 344. [2023-11-28 20:40:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.0735294117647058) internal successors, (365), 343 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 365 transitions. [2023-11-28 20:40:11,385 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 365 transitions. Word has length 233 [2023-11-28 20:40:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:11,386 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 365 transitions. [2023-11-28 20:40:11,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 365 transitions. [2023-11-28 20:40:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-28 20:40:11,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:11,387 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 10, 10, 10, 10, 6, 5, 5, 1, 1, 1, 1] [2023-11-28 20:40:11,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 20:40:11,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:11,588 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:11,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1561226430, now seen corresponding path program 4 times [2023-11-28 20:40:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553526016] [2023-11-28 20:40:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6719 backedges. 3990 proven. 420 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2023-11-28 20:40:12,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553526016] [2023-11-28 20:40:12,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553526016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513382889] [2023-11-28 20:40:12,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:40:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:12,588 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:12,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 20:40:12,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:40:12,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:12,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:40:12,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6719 backedges. 1080 proven. 3382 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2023-11-28 20:40:13,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:14,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-28 20:40:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6719 backedges. 1080 proven. 3382 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2023-11-28 20:40:14,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513382889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:14,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:14,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 14] total 46 [2023-11-28 20:40:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834939122] [2023-11-28 20:40:14,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 20:40:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 20:40:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 20:40:14,360 INFO L87 Difference]: Start difference. First operand 344 states and 365 transitions. Second operand has 46 states, 46 states have (on average 3.847826086956522) internal successors, (177), 46 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:16,855 INFO L93 Difference]: Finished difference Result 310 states and 327 transitions. [2023-11-28 20:40:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-28 20:40:16,855 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.847826086956522) internal successors, (177), 46 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2023-11-28 20:40:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:16,857 INFO L225 Difference]: With dead ends: 310 [2023-11-28 20:40:16,857 INFO L226 Difference]: Without dead ends: 310 [2023-11-28 20:40:16,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 479 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3553 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1578, Invalid=11078, Unknown=0, NotChecked=0, Total=12656 [2023-11-28 20:40:16,859 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 504 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:16,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 18 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:40:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-28 20:40:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2023-11-28 20:40:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.0686274509803921) internal successors, (327), 309 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 327 transitions. [2023-11-28 20:40:16,863 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 327 transitions. Word has length 249 [2023-11-28 20:40:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:16,863 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 327 transitions. [2023-11-28 20:40:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.847826086956522) internal successors, (177), 46 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 327 transitions. [2023-11-28 20:40:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-28 20:40:16,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:16,865 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1] [2023-11-28 20:40:16,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-28 20:40:17,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:17,065 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:17,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1409783013, now seen corresponding path program 5 times [2023-11-28 20:40:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:17,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121261626] [2023-11-28 20:40:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6935 backedges. 3055 proven. 513 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2023-11-28 20:40:18,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121261626] [2023-11-28 20:40:18,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121261626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529282114] [2023-11-28 20:40:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:40:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:18,063 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:18,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 20:40:21,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2023-11-28 20:40:21,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:21,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:40:21,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6935 backedges. 4097 proven. 2225 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2023-11-28 20:40:21,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6935 backedges. 4581 proven. 1741 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2023-11-28 20:40:22,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529282114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:22,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:22,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 62 [2023-11-28 20:40:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357263480] [2023-11-28 20:40:22,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:22,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-28 20:40:22,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-28 20:40:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=3141, Unknown=0, NotChecked=0, Total=3782 [2023-11-28 20:40:22,360 INFO L87 Difference]: Start difference. First operand 310 states and 327 transitions. Second operand has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:24,817 INFO L93 Difference]: Finished difference Result 310 states and 326 transitions. [2023-11-28 20:40:24,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-28 20:40:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2023-11-28 20:40:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:24,819 INFO L225 Difference]: With dead ends: 310 [2023-11-28 20:40:24,819 INFO L226 Difference]: Without dead ends: 310 [2023-11-28 20:40:24,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 467 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3277, Invalid=13753, Unknown=0, NotChecked=0, Total=17030 [2023-11-28 20:40:24,822 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 87 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:24,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 40 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:40:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-28 20:40:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2023-11-28 20:40:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.065359477124183) internal successors, (326), 309 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 326 transitions. [2023-11-28 20:40:24,827 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 326 transitions. Word has length 255 [2023-11-28 20:40:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 326 transitions. [2023-11-28 20:40:24,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 326 transitions. [2023-11-28 20:40:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-28 20:40:24,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:24,830 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1] [2023-11-28 20:40:24,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 20:40:25,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:25,030 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:25,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:25,031 INFO L85 PathProgramCache]: Analyzing trace with hash -48329148, now seen corresponding path program 6 times [2023-11-28 20:40:25,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:25,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431699981] [2023-11-28 20:40:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:25,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 3188 proven. 463 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-28 20:40:25,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:25,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431699981] [2023-11-28 20:40:25,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431699981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:25,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157397364] [2023-11-28 20:40:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:40:25,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:25,994 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:25,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 20:40:26,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:40:26,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:26,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:40:26,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:26,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-28 20:40:26,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-28 20:40:26,790 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 23 treesize of output 1 [2023-11-28 20:40:26,868 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 9 treesize of output 3 [2023-11-28 20:40:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 7110 trivial. 0 not checked. [2023-11-28 20:40:26,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:40:26,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157397364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:26,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:40:26,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 26 [2023-11-28 20:40:26,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583753468] [2023-11-28 20:40:26,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:26,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:40:26,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:40:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:40:26,950 INFO L87 Difference]: Start difference. First operand 310 states and 326 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:26,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:26,984 INFO L93 Difference]: Finished difference Result 309 states and 322 transitions. [2023-11-28 20:40:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:40:26,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2023-11-28 20:40:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:26,986 INFO L225 Difference]: With dead ends: 309 [2023-11-28 20:40:26,986 INFO L226 Difference]: Without dead ends: 309 [2023-11-28 20:40:26,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:40:26,987 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:26,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:40:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-28 20:40:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2023-11-28 20:40:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 306 states have (on average 1.0522875816993464) internal successors, (322), 308 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 322 transitions. [2023-11-28 20:40:26,992 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 322 transitions. Word has length 258 [2023-11-28 20:40:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:26,992 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 322 transitions. [2023-11-28 20:40:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 322 transitions. [2023-11-28 20:40:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-28 20:40:26,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:26,994 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 10, 9, 9, 9, 1, 1] [2023-11-28 20:40:26,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-28 20:40:27,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-28 20:40:27,195 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:27,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 783407388, now seen corresponding path program 10 times [2023-11-28 20:40:27,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:27,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285062864] [2023-11-28 20:40:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:27,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9548 backedges. 5336 proven. 902 refuted. 0 times theorem prover too weak. 3310 trivial. 0 not checked. [2023-11-28 20:40:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285062864] [2023-11-28 20:40:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285062864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112439495] [2023-11-28 20:40:28,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:40:28,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:28,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:28,783 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:28,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 20:40:29,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:40:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:29,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-28 20:40:29,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9548 backedges. 791 proven. 8208 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2023-11-28 20:40:30,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9548 backedges. 791 proven. 8208 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2023-11-28 20:40:31,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112439495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:31,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 91 [2023-11-28 20:40:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001183029] [2023-11-28 20:40:31,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:31,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-28 20:40:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-28 20:40:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1780, Invalid=6410, Unknown=0, NotChecked=0, Total=8190 [2023-11-28 20:40:31,148 INFO L87 Difference]: Start difference. First operand 309 states and 322 transitions. Second operand has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:41,121 INFO L93 Difference]: Finished difference Result 946 states and 1043 transitions. [2023-11-28 20:40:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-11-28 20:40:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2023-11-28 20:40:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:41,126 INFO L225 Difference]: With dead ends: 946 [2023-11-28 20:40:41,126 INFO L226 Difference]: Without dead ends: 946 [2023-11-28 20:40:41,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 472 SyntacticMatches, 11 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50727 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=22730, Invalid=100120, Unknown=0, NotChecked=0, Total=122850 [2023-11-28 20:40:41,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 326 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:41,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 34 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:40:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-28 20:40:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 908. [2023-11-28 20:40:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 905 states have (on average 1.1005524861878453) internal successors, (996), 907 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 996 transitions. [2023-11-28 20:40:41,147 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 996 transitions. Word has length 268 [2023-11-28 20:40:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:41,148 INFO L495 AbstractCegarLoop]: Abstraction has 908 states and 996 transitions. [2023-11-28 20:40:41,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 996 transitions. [2023-11-28 20:40:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-28 20:40:41,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:41,150 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:41,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-28 20:40:41,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-28 20:40:41,350 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:41,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash 532672145, now seen corresponding path program 2 times [2023-11-28 20:40:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177438922] [2023-11-28 20:40:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:41,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2023-11-28 20:40:41,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177438922] [2023-11-28 20:40:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177438922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856559751] [2023-11-28 20:40:41,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:40:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:41,804 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:41,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 20:40:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:40:41,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:41,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:40:41,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7225 trivial. 0 not checked. [2023-11-28 20:40:45,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:40:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856559751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:40:45,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:40:45,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 15 [2023-11-28 20:40:45,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889443291] [2023-11-28 20:40:45,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:40:45,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:40:45,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:40:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2023-11-28 20:40:45,865 INFO L87 Difference]: Start difference. First operand 908 states and 996 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:45,978 INFO L93 Difference]: Finished difference Result 907 states and 995 transitions. [2023-11-28 20:40:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:40:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2023-11-28 20:40:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:45,982 INFO L225 Difference]: With dead ends: 907 [2023-11-28 20:40:45,982 INFO L226 Difference]: Without dead ends: 873 [2023-11-28 20:40:45,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2023-11-28 20:40:45,983 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:45,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:40:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-28 20:40:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2023-11-28 20:40:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.0907003444316876) internal successors, (950), 872 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 950 transitions. [2023-11-28 20:40:45,993 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 950 transitions. Word has length 271 [2023-11-28 20:40:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:45,993 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 950 transitions. [2023-11-28 20:40:45,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 950 transitions. [2023-11-28 20:40:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2023-11-28 20:40:45,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:45,997 INFO L195 NwaCegarLoop]: trace histogram [198, 197, 197, 21, 20, 20, 20, 1, 1] [2023-11-28 20:40:46,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-28 20:40:46,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-28 20:40:46,197 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:46,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:46,198 INFO L85 PathProgramCache]: Analyzing trace with hash 494400108, now seen corresponding path program 11 times [2023-11-28 20:40:46,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:46,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502041791] [2023-11-28 20:40:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 63052 backedges. 34214 proven. 615 refuted. 0 times theorem prover too weak. 28223 trivial. 0 not checked. [2023-11-28 20:40:48,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:48,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502041791] [2023-11-28 20:40:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502041791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:48,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399284909] [2023-11-28 20:40:48,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:40:48,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:48,663 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:48,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 20:40:54,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-28 20:40:54,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:54,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:40:54,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 63052 backedges. 35981 proven. 2535 refuted. 0 times theorem prover too weak. 24536 trivial. 0 not checked. [2023-11-28 20:40:55,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63052 backedges. 36750 proven. 1766 refuted. 0 times theorem prover too weak. 24536 trivial. 0 not checked. [2023-11-28 20:40:56,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399284909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:56,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 70 [2023-11-28 20:40:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447443540] [2023-11-28 20:40:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-28 20:40:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-28 20:40:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4015, Unknown=0, NotChecked=0, Total=4830 [2023-11-28 20:40:56,196 INFO L87 Difference]: Start difference. First operand 873 states and 950 transitions. Second operand has 70 states, 70 states have (on average 3.2714285714285714) internal successors, (229), 70 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:58,675 INFO L93 Difference]: Finished difference Result 873 states and 939 transitions. [2023-11-28 20:40:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-28 20:40:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.2714285714285714) internal successors, (229), 70 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 675 [2023-11-28 20:40:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:58,678 INFO L225 Difference]: With dead ends: 873 [2023-11-28 20:40:58,678 INFO L226 Difference]: Without dead ends: 873 [2023-11-28 20:40:58,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1303 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3665, Invalid=14967, Unknown=0, NotChecked=0, Total=18632 [2023-11-28 20:40:58,680 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:58,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:40:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-28 20:40:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2023-11-28 20:40:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.0780711825487945) internal successors, (939), 872 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 939 transitions. [2023-11-28 20:40:58,691 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 939 transitions. Word has length 675 [2023-11-28 20:40:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:58,691 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 939 transitions. [2023-11-28 20:40:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.2714285714285714) internal successors, (229), 70 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 939 transitions. [2023-11-28 20:40:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2023-11-28 20:40:58,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:58,695 INFO L195 NwaCegarLoop]: trace histogram [208, 207, 207, 21, 20, 20, 20, 1, 1] [2023-11-28 20:40:58,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-28 20:40:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:58,896 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:40:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1597311398, now seen corresponding path program 12 times [2023-11-28 20:40:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666752526] [2023-11-28 20:40:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 69317 backedges. 40656 proven. 1486 refuted. 0 times theorem prover too weak. 27175 trivial. 0 not checked. [2023-11-28 20:41:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666752526] [2023-11-28 20:41:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666752526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:02,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536488048] [2023-11-28 20:41:02,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:41:02,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:02,048 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:02,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 20:41:04,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-11-28 20:41:04,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:04,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 20:41:04,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 69317 backedges. 6706 proven. 13294 refuted. 0 times theorem prover too weak. 49317 trivial. 0 not checked. [2023-11-28 20:41:05,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 69317 backedges. 0 proven. 20000 refuted. 0 times theorem prover too weak. 49317 trivial. 0 not checked. [2023-11-28 20:41:07,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536488048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:07,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:07,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 19] total 69 [2023-11-28 20:41:07,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596592070] [2023-11-28 20:41:07,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:07,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-28 20:41:07,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-28 20:41:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=3920, Unknown=0, NotChecked=0, Total=4692 [2023-11-28 20:41:07,673 INFO L87 Difference]: Start difference. First operand 873 states and 939 transitions. Second operand has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:41:19,234 INFO L93 Difference]: Finished difference Result 1083 states and 1160 transitions. [2023-11-28 20:41:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-11-28 20:41:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 705 [2023-11-28 20:41:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:41:19,238 INFO L225 Difference]: With dead ends: 1083 [2023-11-28 20:41:19,238 INFO L226 Difference]: Without dead ends: 1083 [2023-11-28 20:41:19,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1636 GetRequests, 1384 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20274 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=10374, Invalid=53888, Unknown=0, NotChecked=0, Total=64262 [2023-11-28 20:41:19,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1221 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:41:19,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 0 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:41:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2023-11-28 20:41:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 965. [2023-11-28 20:41:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 963 states have (on average 1.0893042575285565) internal successors, (1049), 964 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1049 transitions. [2023-11-28 20:41:19,253 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1049 transitions. Word has length 705 [2023-11-28 20:41:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:41:19,253 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 1049 transitions. [2023-11-28 20:41:19,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 69 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1049 transitions. [2023-11-28 20:41:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2023-11-28 20:41:19,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:19,257 INFO L195 NwaCegarLoop]: trace histogram [217, 217, 216, 21, 20, 20, 20, 1, 1] [2023-11-28 20:41:19,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-28 20:41:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-28 20:41:19,458 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:41:19,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2063641331, now seen corresponding path program 3 times [2023-11-28 20:41:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:19,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039300723] [2023-11-28 20:41:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 75428 backedges. 44500 proven. 846 refuted. 0 times theorem prover too weak. 30082 trivial. 0 not checked. [2023-11-28 20:41:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039300723] [2023-11-28 20:41:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039300723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135316702] [2023-11-28 20:41:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:41:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:22,387 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:22,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-28 20:41:22,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:41:22,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:41:22,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:41:22,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:22,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-28 20:41:22,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-28 20:41:22,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-28 20:41:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 75428 backedges. 22 proven. 13910 refuted. 0 times theorem prover too weak. 61496 trivial. 0 not checked. [2023-11-28 20:41:29,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 75428 backedges. 0 proven. 13932 refuted. 0 times theorem prover too weak. 61496 trivial. 0 not checked. [2023-11-28 20:41:39,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135316702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:39,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:39,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 44 [2023-11-28 20:41:39,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343553346] [2023-11-28 20:41:39,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:39,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-28 20:41:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-28 20:41:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 20:41:39,576 INFO L87 Difference]: Start difference. First operand 965 states and 1049 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:41:47,337 INFO L93 Difference]: Finished difference Result 1012 states and 1079 transitions. [2023-11-28 20:41:47,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-28 20:41:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 733 [2023-11-28 20:41:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:41:47,341 INFO L225 Difference]: With dead ends: 1012 [2023-11-28 20:41:47,341 INFO L226 Difference]: Without dead ends: 1012 [2023-11-28 20:41:47,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1554 GetRequests, 1455 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2308, Invalid=7792, Unknown=0, NotChecked=0, Total=10100 [2023-11-28 20:41:47,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:41:47,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:41:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2023-11-28 20:41:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 1007. [2023-11-28 20:41:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.0675944333996024) internal successors, (1074), 1006 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1074 transitions. [2023-11-28 20:41:47,353 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1074 transitions. Word has length 733 [2023-11-28 20:41:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:41:47,353 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1074 transitions. [2023-11-28 20:41:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 44 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1074 transitions. [2023-11-28 20:41:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2023-11-28 20:41:47,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:47,358 INFO L195 NwaCegarLoop]: trace histogram [251, 250, 250, 22, 21, 21, 21, 1, 1] [2023-11-28 20:41:47,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-28 20:41:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-28 20:41:47,559 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:41:47,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash 494873412, now seen corresponding path program 13 times [2023-11-28 20:41:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:47,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434972196] [2023-11-28 20:41:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:47,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 100007 backedges. 58423 proven. 975 refuted. 0 times theorem prover too weak. 40609 trivial. 0 not checked. [2023-11-28 20:41:51,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:51,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434972196] [2023-11-28 20:41:51,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434972196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:51,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575457202] [2023-11-28 20:41:51,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:41:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:51,284 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-28 20:41:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:51,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 3469 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:41:51,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 100007 backedges. 66346 proven. 4954 refuted. 0 times theorem prover too weak. 28707 trivial. 0 not checked. [2023-11-28 20:41:52,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 100007 backedges. 66346 proven. 4954 refuted. 0 times theorem prover too weak. 28707 trivial. 0 not checked. [2023-11-28 20:41:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575457202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:53,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:53,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 76 [2023-11-28 20:41:53,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926120217] [2023-11-28 20:41:53,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:54,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-28 20:41:54,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-28 20:41:54,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=4783, Unknown=0, NotChecked=0, Total=5700 [2023-11-28 20:41:54,002 INFO L87 Difference]: Start difference. First operand 1007 states and 1074 transitions. Second operand has 76 states, 76 states have (on average 3.736842105263158) internal successors, (284), 76 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:00,753 INFO L93 Difference]: Finished difference Result 1058 states and 1116 transitions. [2023-11-28 20:42:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-11-28 20:42:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.736842105263158) internal successors, (284), 76 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 838 [2023-11-28 20:42:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:00,759 INFO L225 Difference]: With dead ends: 1058 [2023-11-28 20:42:00,759 INFO L226 Difference]: Without dead ends: 1058 [2023-11-28 20:42:00,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1842 GetRequests, 1621 SyntacticMatches, 14 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11410 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7521, Invalid=35951, Unknown=0, NotChecked=0, Total=43472 [2023-11-28 20:42:00,761 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6324 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:00,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 6346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6324 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-28 20:42:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2023-11-28 20:42:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1053. [2023-11-28 20:42:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 1.056083650190114) internal successors, (1111), 1052 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1111 transitions. [2023-11-28 20:42:00,776 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1111 transitions. Word has length 838 [2023-11-28 20:42:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:00,777 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1111 transitions. [2023-11-28 20:42:00,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.736842105263158) internal successors, (284), 76 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1111 transitions. [2023-11-28 20:42:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2023-11-28 20:42:00,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:00,786 INFO L195 NwaCegarLoop]: trace histogram [258, 257, 257, 22, 21, 21, 21, 1, 1] [2023-11-28 20:42:00,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-28 20:42:00,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:00,986 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:42:00,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:00,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1070391387, now seen corresponding path program 14 times [2023-11-28 20:42:00,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:00,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119448798] [2023-11-28 20:42:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:00,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 105481 backedges. 63046 proven. 1113 refuted. 0 times theorem prover too weak. 41322 trivial. 0 not checked. [2023-11-28 20:42:04,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119448798] [2023-11-28 20:42:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119448798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:04,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212152976] [2023-11-28 20:42:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:42:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:04,950 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:04,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-28 20:42:05,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:42:05,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:05,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 3546 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-28 20:42:05,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 105481 backedges. 74077 proven. 6028 refuted. 0 times theorem prover too weak. 25376 trivial. 0 not checked. [2023-11-28 20:42:06,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105481 backedges. 74077 proven. 6028 refuted. 0 times theorem prover too weak. 25376 trivial. 0 not checked. [2023-11-28 20:42:08,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212152976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:08,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:08,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32, 32] total 81 [2023-11-28 20:42:08,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860336826] [2023-11-28 20:42:08,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:08,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-28 20:42:08,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-28 20:42:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2023-11-28 20:42:08,048 INFO L87 Difference]: Start difference. First operand 1053 states and 1111 transitions. Second operand has 81 states, 81 states have (on average 3.740740740740741) internal successors, (303), 81 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:15,674 INFO L93 Difference]: Finished difference Result 1107 states and 1157 transitions. [2023-11-28 20:42:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-11-28 20:42:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.740740740740741) internal successors, (303), 81 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 859 [2023-11-28 20:42:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:15,680 INFO L225 Difference]: With dead ends: 1107 [2023-11-28 20:42:15,680 INFO L226 Difference]: Without dead ends: 1107 [2023-11-28 20:42:15,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1903 GetRequests, 1659 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14030 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9152, Invalid=43978, Unknown=0, NotChecked=0, Total=53130 [2023-11-28 20:42:15,683 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6873 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:15,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 6899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6873 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-28 20:42:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2023-11-28 20:42:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1102. [2023-11-28 20:42:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 1.0463215258855585) internal successors, (1152), 1101 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1152 transitions. [2023-11-28 20:42:15,698 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1152 transitions. Word has length 859 [2023-11-28 20:42:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:15,698 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1152 transitions. [2023-11-28 20:42:15,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.740740740740741) internal successors, (303), 81 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1152 transitions. [2023-11-28 20:42:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2023-11-28 20:42:15,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:15,704 INFO L195 NwaCegarLoop]: trace histogram [264, 263, 263, 22, 21, 21, 21, 1, 1] [2023-11-28 20:42:15,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-28 20:42:15,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:15,906 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:42:15,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1086461061, now seen corresponding path program 15 times [2023-11-28 20:42:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606856030] [2023-11-28 20:42:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:15,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 110290 backedges. 66431 proven. 1260 refuted. 0 times theorem prover too weak. 42599 trivial. 0 not checked. [2023-11-28 20:42:20,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:20,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606856030] [2023-11-28 20:42:20,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606856030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:20,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728920574] [2023-11-28 20:42:20,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:42:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:20,176 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:20,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-28 20:42:21,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-28 20:42:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:21,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-28 20:42:21,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110290 backedges. 0 proven. 17608 refuted. 0 times theorem prover too weak. 92682 trivial. 0 not checked. [2023-11-28 20:42:23,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110290 backedges. 0 proven. 17608 refuted. 0 times theorem prover too weak. 92682 trivial. 0 not checked. [2023-11-28 20:42:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728920574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:26,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:26,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 24, 24] total 86 [2023-11-28 20:42:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190001055] [2023-11-28 20:42:26,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:26,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-28 20:42:26,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-28 20:42:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=6257, Unknown=0, NotChecked=0, Total=7310 [2023-11-28 20:42:26,442 INFO L87 Difference]: Start difference. First operand 1102 states and 1152 transitions. Second operand has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:36,556 INFO L93 Difference]: Finished difference Result 1222 states and 1274 transitions. [2023-11-28 20:42:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-28 20:42:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 877 [2023-11-28 20:42:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:36,562 INFO L225 Difference]: With dead ends: 1222 [2023-11-28 20:42:36,562 INFO L226 Difference]: Without dead ends: 1222 [2023-11-28 20:42:36,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1877 GetRequests, 1707 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6980 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5362, Invalid=24050, Unknown=0, NotChecked=0, Total=29412 [2023-11-28 20:42:36,564 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 572 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:36,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 0 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:42:36,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-11-28 20:42:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1173. [2023-11-28 20:42:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 1.0401023890784984) internal successors, (1219), 1172 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1219 transitions. [2023-11-28 20:42:36,575 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1219 transitions. Word has length 877 [2023-11-28 20:42:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:36,576 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1219 transitions. [2023-11-28 20:42:36,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.1627906976744184) internal successors, (272), 86 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1219 transitions. [2023-11-28 20:42:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2023-11-28 20:42:36,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:36,583 INFO L195 NwaCegarLoop]: trace histogram [279, 278, 278, 22, 21, 21, 21, 1, 1] [2023-11-28 20:42:36,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-28 20:42:36,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-28 20:42:36,783 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:42:36,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:36,784 INFO L85 PathProgramCache]: Analyzing trace with hash 552626300, now seen corresponding path program 16 times [2023-11-28 20:42:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:36,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422611334] [2023-11-28 20:42:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 122785 backedges. 77895 proven. 3006 refuted. 0 times theorem prover too weak. 41884 trivial. 0 not checked. [2023-11-28 20:42:41,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422611334] [2023-11-28 20:42:41,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422611334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202765547] [2023-11-28 20:42:41,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:42:41,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:41,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:41,875 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:41,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-28 20:42:47,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:42:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:47,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-28 20:42:47,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 122785 backedges. 93216 proven. 8617 refuted. 0 times theorem prover too weak. 20952 trivial. 0 not checked. [2023-11-28 20:42:48,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 122785 backedges. 93216 proven. 8617 refuted. 0 times theorem prover too weak. 20952 trivial. 0 not checked. [2023-11-28 20:42:50,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202765547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:50,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 91 [2023-11-28 20:42:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505693927] [2023-11-28 20:42:50,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:50,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-28 20:42:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-28 20:42:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=6899, Unknown=0, NotChecked=0, Total=8190 [2023-11-28 20:42:50,176 INFO L87 Difference]: Start difference. First operand 1173 states and 1219 transitions. Second operand has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:00,792 INFO L93 Difference]: Finished difference Result 1236 states and 1276 transitions. [2023-11-28 20:43:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2023-11-28 20:43:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 922 [2023-11-28 20:43:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:00,797 INFO L225 Difference]: With dead ends: 1236 [2023-11-28 20:43:00,797 INFO L226 Difference]: Without dead ends: 1236 [2023-11-28 20:43:00,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2071 GetRequests, 1778 SyntacticMatches, 17 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20587 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=13235, Invalid=63771, Unknown=0, NotChecked=0, Total=77006 [2023-11-28 20:43:00,801 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8415 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:00,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 8446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 8415 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-28 20:43:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-11-28 20:43:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1231. [2023-11-28 20:43:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 1.0333333333333334) internal successors, (1271), 1230 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1271 transitions. [2023-11-28 20:43:00,811 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1271 transitions. Word has length 922 [2023-11-28 20:43:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:00,811 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1271 transitions. [2023-11-28 20:43:00,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.769230769230769) internal successors, (343), 91 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:43:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1271 transitions. [2023-11-28 20:43:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2023-11-28 20:43:00,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:00,818 INFO L195 NwaCegarLoop]: trace histogram [283, 282, 282, 22, 21, 21, 21, 1, 1] [2023-11-28 20:43:00,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-28 20:43:01,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-28 20:43:01,018 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:43:01,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1597246752, now seen corresponding path program 17 times [2023-11-28 20:43:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:01,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139690417] [2023-11-28 20:43:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 126231 backedges. 73687 proven. 1581 refuted. 0 times theorem prover too weak. 50963 trivial. 0 not checked. [2023-11-28 20:43:06,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139690417] [2023-11-28 20:43:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139690417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862586850] [2023-11-28 20:43:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:43:06,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:06,044 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:06,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-28 20:51:05,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2023-11-28 20:51:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:51:05,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 3428 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-28 20:51:05,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:51:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 126231 backedges. 97259 proven. 11768 refuted. 0 times theorem prover too weak. 17204 trivial. 0 not checked. [2023-11-28 20:51:06,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:51:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 126231 backedges. 100072 proven. 8955 refuted. 0 times theorem prover too weak. 17204 trivial. 0 not checked. [2023-11-28 20:51:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862586850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:51:08,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:51:08,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 105 [2023-11-28 20:51:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295772531] [2023-11-28 20:51:08,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:51:08,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-28 20:51:08,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:51:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-28 20:51:08,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1746, Invalid=9174, Unknown=0, NotChecked=0, Total=10920 [2023-11-28 20:51:08,443 INFO L87 Difference]: Start difference. First operand 1231 states and 1271 transitions. Second operand has 105 states, 105 states have (on average 3.447619047619048) internal successors, (362), 105 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:51:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:51:18,317 INFO L93 Difference]: Finished difference Result 1349 states and 1384 transitions. [2023-11-28 20:51:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2023-11-28 20:51:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.447619047619048) internal successors, (362), 105 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 934 [2023-11-28 20:51:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:51:18,322 INFO L225 Difference]: With dead ends: 1349 [2023-11-28 20:51:18,323 INFO L226 Difference]: Without dead ends: 1349 [2023-11-28 20:51:18,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2095 GetRequests, 1793 SyntacticMatches, 13 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22886 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=15152, Invalid=69238, Unknown=0, NotChecked=0, Total=84390 [2023-11-28 20:51:18,326 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7486 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 7486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:51:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1 Invalid, 7518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 7486 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-28 20:51:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-11-28 20:51:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1286. [2023-11-28 20:51:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 1.0280155642023345) internal successors, (1321), 1285 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:51:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1321 transitions. [2023-11-28 20:51:18,337 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1321 transitions. Word has length 934 [2023-11-28 20:51:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:51:18,338 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 1321 transitions. [2023-11-28 20:51:18,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.447619047619048) internal successors, (362), 105 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:51:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1321 transitions. [2023-11-28 20:51:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2023-11-28 20:51:18,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:51:18,347 INFO L195 NwaCegarLoop]: trace histogram [286, 285, 285, 22, 21, 21, 21, 1, 1] [2023-11-28 20:51:18,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-28 20:51:18,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-28 20:51:18,548 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 20:51:18,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:51:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1060232357, now seen corresponding path program 18 times [2023-11-28 20:51:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:51:18,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217597521] [2023-11-28 20:51:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:51:18,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:51:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:51:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128847 backedges. 71448 proven. 1755 refuted. 0 times theorem prover too weak. 55644 trivial. 0 not checked. [2023-11-28 20:51:23,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:51:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217597521] [2023-11-28 20:51:23,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217597521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:51:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284224744] [2023-11-28 20:51:23,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:51:23,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:51:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:51:23,850 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:51:23,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07242363-54c7-4e77-a14b-ebb9f0908952/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-28 20:51:50,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2023-11-28 20:51:50,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:51:50,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-28 20:51:50,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:51:50,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:51:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:51:50,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-28 20:51:56,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-28 20:51:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 128847 backedges. 49319 proven. 30833 refuted. 0 times theorem prover too weak. 48695 trivial. 0 not checked. [2023-11-28 20:51:58,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:52:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 128847 backedges. 0 proven. 80152 refuted. 0 times theorem prover too weak. 48695 trivial. 0 not checked. [2023-11-28 20:52:15,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284224744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:52:15,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:52:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 59, 60] total 163 [2023-11-28 20:52:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472154151] [2023-11-28 20:52:15,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:52:15,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-11-28 20:52:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:52:15,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-11-28 20:52:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3065, Invalid=23341, Unknown=0, NotChecked=0, Total=26406 [2023-11-28 20:52:15,910 INFO L87 Difference]: Start difference. First operand 1286 states and 1321 transitions. Second operand has 163 states, 163 states have (on average 2.8220858895705523) internal successors, (460), 163 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)