./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.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_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/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_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/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_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:29:58,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:29:58,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:29:58,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:29:58,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:29:58,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:29:58,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:29:58,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:29:58,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:29:58,659 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:29:58,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:29:58,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:29:58,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:29:58,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:29:58,663 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:29:58,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:29:58,664 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:29:58,664 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:29:58,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:29:58,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:29:58,666 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:29:58,667 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:29:58,667 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:29:58,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:29:58,668 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:29:58,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:29:58,669 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:29:58,670 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:29:58,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:29:58,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:29:58,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:29:58,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:29:58,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:29:58,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:29:58,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:29:58,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:29:58,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:29:58,673 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:29:58,673 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:29:58,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:29:58,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:29:58,674 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_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2023-11-29 02:29:58,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:29:58,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:29:58,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:29:58,900 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:29:58,901 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:29:58,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2023-11-29 02:30:01,654 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:30:01,835 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:30:01,835 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2023-11-29 02:30:01,841 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/data/75c7d07eb/2cba018788c2433e964a68cedb25f037/FLAG330e97951 [2023-11-29 02:30:01,853 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/data/75c7d07eb/2cba018788c2433e964a68cedb25f037 [2023-11-29 02:30:01,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:30:01,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:30:01,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:30:01,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:30:01,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:30:01,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:30:01" (1/1) ... [2023-11-29 02:30:01,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a65d5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:01, skipping insertion in model container [2023-11-29 02:30:01,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:30:01" (1/1) ... [2023-11-29 02:30:01,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:30:02,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:30:02,013 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:30:02,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:30:02,038 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:30:02,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02 WrapperNode [2023-11-29 02:30:02,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:30:02,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:30:02,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:30:02,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:30:02,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,066 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-29 02:30:02,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:30:02,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:30:02,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:30:02,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:30:02,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,091 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]. [2023-11-29 02:30:02,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:30:02,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:30:02,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:30:02,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:30:02,107 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (1/1) ... [2023-11-29 02:30:02,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:30:02,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:02,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:30:02,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:30:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:30:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:30:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:30:02,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:30:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:30:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:30:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:30:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:30:02,233 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:30:02,234 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:30:02,399 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:30:02,429 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:30:02,429 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 02:30:02,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:30:02 BoogieIcfgContainer [2023-11-29 02:30:02,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:30:02,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:30:02,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:30:02,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:30:02,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:30:01" (1/3) ... [2023-11-29 02:30:02,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8974709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:30:02, skipping insertion in model container [2023-11-29 02:30:02,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:30:02" (2/3) ... [2023-11-29 02:30:02,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8974709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:30:02, skipping insertion in model container [2023-11-29 02:30:02,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:30:02" (3/3) ... [2023-11-29 02:30:02,439 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2023-11-29 02:30:02,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:30:02,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-29 02:30:02,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:30:02,502 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;@7be4d018, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:30:02,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-29 02:30:02,506 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) [2023-11-29 02:30:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 02:30:02,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:02,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 02:30:02,511 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)] === [2023-11-29 02:30:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2023-11-29 02:30:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111535395] [2023-11-29 02:30:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:02,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111535395] [2023-11-29 02:30:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111535395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:02,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:30:02,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932316731] [2023-11-29 02:30:02,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:02,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:30:02,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:30:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:30:02,787 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) [2023-11-29 02:30:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:02,836 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-29 02:30:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:30:02,839 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 [2023-11-29 02:30:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:02,846 INFO L225 Difference]: With dead ends: 28 [2023-11-29 02:30:02,847 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 02:30:02,848 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 [2023-11-29 02:30:02,852 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 [2023-11-29 02:30:02,853 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] [2023-11-29 02:30:02,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 02:30:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-29 02:30:02,882 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) [2023-11-29 02:30:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-29 02:30:02,884 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2023-11-29 02:30:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:02,885 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-29 02:30:02,885 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) [2023-11-29 02:30:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-29 02:30:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:30:02,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:02,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:30:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:30:02,887 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)] === [2023-11-29 02:30:02,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash 96326476, now seen corresponding path program 1 times [2023-11-29 02:30:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:02,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992133560] [2023-11-29 02:30:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:02,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:02,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992133560] [2023-11-29 02:30:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992133560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:02,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:02,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:30:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347350928] [2023-11-29 02:30:02,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:30:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:30:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:30:02,958 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) [2023-11-29 02:30:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:03,003 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-29 02:30:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:30:03,004 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 [2023-11-29 02:30:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:03,005 INFO L225 Difference]: With dead ends: 43 [2023-11-29 02:30:03,005 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 02:30:03,006 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 [2023-11-29 02:30:03,007 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 [2023-11-29 02:30:03,008 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] [2023-11-29 02:30:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 02:30:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2023-11-29 02:30:03,012 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) [2023-11-29 02:30:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 02:30:03,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2023-11-29 02:30:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:03,014 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 02:30:03,014 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) [2023-11-29 02:30:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 02:30:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:30:03,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:03,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:30:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:30:03,016 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)] === [2023-11-29 02:30:03,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash 96361891, now seen corresponding path program 1 times [2023-11-29 02:30:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778100321] [2023-11-29 02:30:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778100321] [2023-11-29 02:30:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778100321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:30:03,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704798427] [2023-11-29 02:30:03,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:03,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:30:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:30:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:30:03,117 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) [2023-11-29 02:30:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:03,190 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-11-29 02:30:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:30:03,191 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 [2023-11-29 02:30:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:03,192 INFO L225 Difference]: With dead ends: 46 [2023-11-29 02:30:03,192 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 02:30:03,192 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 [2023-11-29 02:30:03,194 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 [2023-11-29 02:30:03,194 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] [2023-11-29 02:30:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 02:30:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 26. [2023-11-29 02:30:03,198 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) [2023-11-29 02:30:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-29 02:30:03,200 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2023-11-29 02:30:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:03,200 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-29 02:30:03,200 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) [2023-11-29 02:30:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-29 02:30:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:30:03,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:03,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:30:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:30:03,202 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)] === [2023-11-29 02:30:03,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2023-11-29 02:30:03,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:03,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883535006] [2023-11-29 02:30:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:03,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883535006] [2023-11-29 02:30:03,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883535006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:03,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:03,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:30:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861282205] [2023-11-29 02:30:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:03,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:30:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:30:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:30:03,285 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) [2023-11-29 02:30:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:03,321 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-29 02:30:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:30:03,322 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 [2023-11-29 02:30:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:03,323 INFO L225 Difference]: With dead ends: 25 [2023-11-29 02:30:03,323 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 02:30:03,323 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 [2023-11-29 02:30:03,325 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 [2023-11-29 02:30:03,326 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] [2023-11-29 02:30:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 02:30:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 02:30:03,329 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) [2023-11-29 02:30:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 02:30:03,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2023-11-29 02:30:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:03,330 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 02:30:03,330 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) [2023-11-29 02:30:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 02:30:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:30:03,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:03,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:30:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:30:03,332 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)] === [2023-11-29 02:30:03,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2023-11-29 02:30:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:03,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214401755] [2023-11-29 02:30:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214401755] [2023-11-29 02:30:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214401755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:30:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18151630] [2023-11-29 02:30:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:30:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:30:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:30:03,457 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) [2023-11-29 02:30:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:03,516 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-29 02:30:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:30:03,517 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 [2023-11-29 02:30:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:03,517 INFO L225 Difference]: With dead ends: 27 [2023-11-29 02:30:03,517 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 02:30:03,518 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 [2023-11-29 02:30:03,519 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 [2023-11-29 02:30:03,520 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] [2023-11-29 02:30:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 02:30:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-29 02:30:03,523 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) [2023-11-29 02:30:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-29 02:30:03,524 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2023-11-29 02:30:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-29 02:30:03,525 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) [2023-11-29 02:30:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-29 02:30:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:30:03,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:03,525 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 02:30:03,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:30:03,526 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)] === [2023-11-29 02:30:03,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2023-11-29 02:30:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:03,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582299070] [2023-11-29 02:30:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:03,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582299070] [2023-11-29 02:30:03,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582299070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:03,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440897708] [2023-11-29 02:30:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:03,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:03,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:03,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:30:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:03,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:30:03,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440897708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:03,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:03,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 02:30:03,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701478713] [2023-11-29 02:30:03,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:03,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:30:03,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:30:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:30:03,746 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) [2023-11-29 02:30:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:03,825 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-11-29 02:30:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:30:03,826 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 [2023-11-29 02:30:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:03,828 INFO L225 Difference]: With dead ends: 40 [2023-11-29 02:30:03,828 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 02:30:03,828 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 [2023-11-29 02:30:03,829 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 [2023-11-29 02:30:03,830 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] [2023-11-29 02:30:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 02:30:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-11-29 02:30:03,834 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) [2023-11-29 02:30:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-11-29 02:30:03,835 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 7 [2023-11-29 02:30:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:03,836 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-11-29 02:30:03,836 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) [2023-11-29 02:30:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-11-29 02:30:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 02:30:03,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:03,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:03,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:30:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:04,041 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)] === [2023-11-29 02:30:04,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917050, now seen corresponding path program 1 times [2023-11-29 02:30:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784023841] [2023-11-29 02:30:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:04,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:04,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784023841] [2023-11-29 02:30:04,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784023841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186069613] [2023-11-29 02:30:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:04,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:04,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:04,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:04,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:30:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:04,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:30:04,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:04,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:04,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186069613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:04,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:04,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 02:30:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734365837] [2023-11-29 02:30:04,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:04,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:30:04,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:04,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:30:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:30:04,311 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:04,482 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-11-29 02:30:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:30:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 02:30:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:04,483 INFO L225 Difference]: With dead ends: 61 [2023-11-29 02:30:04,483 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:30:04,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:30:04,484 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:04,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:30:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2023-11-29 02:30:04,489 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) [2023-11-29 02:30:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-29 02:30:04,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2023-11-29 02:30:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:04,490 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-29 02:30:04,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-29 02:30:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 02:30:04,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:04,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 02:30:04,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:30:04,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:04,693 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)] === [2023-11-29 02:30:04,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917194, now seen corresponding path program 1 times [2023-11-29 02:30:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861756884] [2023-11-29 02:30:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:04,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:04,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861756884] [2023-11-29 02:30:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861756884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150292535] [2023-11-29 02:30:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:04,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:04,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:04,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:30:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:04,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:30:04,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:04,900 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 [2023-11-29 02:30:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:04,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:05,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150292535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:05,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:05,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-29 02:30:05,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699729261] [2023-11-29 02:30:05,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:05,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:30:05,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:05,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:30:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:30:05,066 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) [2023-11-29 02:30:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:05,210 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-29 02:30:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:30:05,210 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 [2023-11-29 02:30:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:05,211 INFO L225 Difference]: With dead ends: 36 [2023-11-29 02:30:05,211 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 02:30:05,211 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 [2023-11-29 02:30:05,212 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:05,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 37 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 02:30:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-11-29 02:30:05,215 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) [2023-11-29 02:30:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-29 02:30:05,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 8 [2023-11-29 02:30:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:05,216 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-29 02:30:05,217 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) [2023-11-29 02:30:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-29 02:30:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:30:05,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:05,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:30:05,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:30:05,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:05,423 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)] === [2023-11-29 02:30:05,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash 87024195, now seen corresponding path program 2 times [2023-11-29 02:30:05,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:05,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032349102] [2023-11-29 02:30:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:30:05,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032349102] [2023-11-29 02:30:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032349102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:05,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:05,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:30:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229547309] [2023-11-29 02:30:05,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:05,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:30:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:30:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:30:05,519 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) [2023-11-29 02:30:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:05,538 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-29 02:30:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:30:05,539 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 [2023-11-29 02:30:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:05,539 INFO L225 Difference]: With dead ends: 32 [2023-11-29 02:30:05,539 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 02:30:05,539 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 [2023-11-29 02:30:05,540 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:05,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:30:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 02:30:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 02:30:05,543 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) [2023-11-29 02:30:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-29 02:30:05,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2023-11-29 02:30:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:05,544 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-29 02:30:05,544 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) [2023-11-29 02:30:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-29 02:30:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:30:05,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:05,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 02:30:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:30:05,545 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)] === [2023-11-29 02:30:05,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:05,546 INFO L85 PathProgramCache]: Analyzing trace with hash 87024196, now seen corresponding path program 1 times [2023-11-29 02:30:05,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:05,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614178533] [2023-11-29 02:30:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:05,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:05,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614178533] [2023-11-29 02:30:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614178533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:05,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:30:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:30:05,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443488334] [2023-11-29 02:30:05,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:30:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:30:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:30:05,675 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) [2023-11-29 02:30:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:05,705 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-11-29 02:30:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:30:05,706 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 [2023-11-29 02:30:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:05,706 INFO L225 Difference]: With dead ends: 51 [2023-11-29 02:30:05,707 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 02:30:05,707 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 [2023-11-29 02:30:05,708 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 [2023-11-29 02:30:05,708 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] [2023-11-29 02:30:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 02:30:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-29 02:30:05,712 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) [2023-11-29 02:30:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-29 02:30:05,713 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 11 [2023-11-29 02:30:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:05,714 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-29 02:30:05,714 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) [2023-11-29 02:30:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-29 02:30:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 02:30:05,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:05,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:05,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:30:05,716 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)] === [2023-11-29 02:30:05,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1284463060, now seen corresponding path program 1 times [2023-11-29 02:30:05,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:05,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431479878] [2023-11-29 02:30:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:05,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:05,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431479878] [2023-11-29 02:30:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431479878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579270288] [2023-11-29 02:30:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:05,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:05,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:05,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:30:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:05,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:30:05,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:05,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:06,004 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 [2023-11-29 02:30:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579270288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:06,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:06,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 02:30:06,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085231215] [2023-11-29 02:30:06,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:06,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:30:06,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:06,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:30:06,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:30:06,052 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) [2023-11-29 02:30:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:06,126 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-29 02:30:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:30:06,127 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 [2023-11-29 02:30:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:06,128 INFO L225 Difference]: With dead ends: 53 [2023-11-29 02:30:06,128 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 02:30:06,128 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 [2023-11-29 02:30:06,129 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:06,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 17 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:30:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 02:30:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-29 02:30:06,133 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) [2023-11-29 02:30:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-11-29 02:30:06,133 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2023-11-29 02:30:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:06,134 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-11-29 02:30:06,134 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) [2023-11-29 02:30:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-11-29 02:30:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 02:30:06,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:06,135 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2023-11-29 02:30:06,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:30:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:30:06,336 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)] === [2023-11-29 02:30:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1343436067, now seen corresponding path program 2 times [2023-11-29 02:30:06,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:06,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769831112] [2023-11-29 02:30:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:06,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769831112] [2023-11-29 02:30:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769831112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:06,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046671244] [2023-11-29 02:30:06,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:06,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:06,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:06,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:30:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:06,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:30:06,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:06,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:30:06,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046671244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:06,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:30:06,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-29 02:30:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057030634] [2023-11-29 02:30:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:30:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:30:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:30:06,604 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) [2023-11-29 02:30:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:06,683 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-29 02:30:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:30:06,684 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 [2023-11-29 02:30:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:06,684 INFO L225 Difference]: With dead ends: 45 [2023-11-29 02:30:06,684 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 02:30:06,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:30:06,685 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:06,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 02:30:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-29 02:30:06,689 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) [2023-11-29 02:30:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-29 02:30:06,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2023-11-29 02:30:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:06,690 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-29 02:30:06,690 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) [2023-11-29 02:30:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-29 02:30:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 02:30:06,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:06,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:06,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:30:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:30:06,893 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)] === [2023-11-29 02:30:06,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1713387055, now seen corresponding path program 1 times [2023-11-29 02:30:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053299020] [2023-11-29 02:30:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053299020] [2023-11-29 02:30:06,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053299020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:06,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877034319] [2023-11-29 02:30:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:06,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:06,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:06,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:30:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:07,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:30:07,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:07,205 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)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 1) |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)))) is different from true [2023-11-29 02:30:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:30:07,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:30:07,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877034319] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:07,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:30:07,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 11 [2023-11-29 02:30:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575267053] [2023-11-29 02:30:07,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:30:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:30:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=78, Unknown=1, NotChecked=18, Total=132 [2023-11-29 02:30:07,289 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:07,313 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-29 02:30:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:30:07,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2023-11-29 02:30:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:07,314 INFO L225 Difference]: With dead ends: 41 [2023-11-29 02:30:07,315 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 02:30:07,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=78, Unknown=1, NotChecked=18, Total=132 [2023-11-29 02:30:07,316 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:07,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:30:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 02:30:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 02:30:07,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 38 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) [2023-11-29 02:30:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-29 02:30:07,319 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 17 [2023-11-29 02:30:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:07,319 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-29 02:30:07,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-29 02:30:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 02:30:07,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:07,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:07,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:30:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:30:07,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:07,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1575394492, now seen corresponding path program 1 times [2023-11-29 02:30:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:07,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021816384] [2023-11-29 02:30:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:07,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 02:30:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021816384] [2023-11-29 02:30:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021816384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629180821] [2023-11-29 02:30:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:07,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:07,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:07,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:30:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:07,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:30:07,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:07,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 02:30:07,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 02:30:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:07,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:07,887 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 14 treesize of output 12 [2023-11-29 02:30:07,890 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 [2023-11-29 02:30:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:30:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629180821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:07,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2023-11-29 02:30:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796752878] [2023-11-29 02:30:08,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:08,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:30:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:30:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:30:08,001 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:08,180 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-11-29 02:30:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:30:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 02:30:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:08,181 INFO L225 Difference]: With dead ends: 65 [2023-11-29 02:30:08,181 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 02:30:08,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:30:08,182 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:08,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:30:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 02:30:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2023-11-29 02:30:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 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) [2023-11-29 02:30:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-29 02:30:08,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 18 [2023-11-29 02:30:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:08,186 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-29 02:30:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-29 02:30:08,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 02:30:08,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:08,187 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1] [2023-11-29 02:30:08,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:30:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:30:08,393 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)] === [2023-11-29 02:30:08,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1817303157, now seen corresponding path program 1 times [2023-11-29 02:30:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:08,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943093591] [2023-11-29 02:30:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943093591] [2023-11-29 02:30:08,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943093591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519854756] [2023-11-29 02:30:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:08,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:08,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:08,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:30:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:08,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:30:08,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:08,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519854756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:08,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 02:30:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594038820] [2023-11-29 02:30:08,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:08,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:30:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:30:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:30:08,774 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2023-11-29 02:30:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:08,922 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-11-29 02:30:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:30:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2023-11-29 02:30:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:08,924 INFO L225 Difference]: With dead ends: 41 [2023-11-29 02:30:08,924 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 02:30:08,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:30:08,925 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:08,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 7 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 02:30:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-29 02:30:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 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) [2023-11-29 02:30:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-11-29 02:30:08,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 21 [2023-11-29 02:30:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:08,929 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-11-29 02:30:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2023-11-29 02:30:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-11-29 02:30:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 02:30:08,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:08,930 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1] [2023-11-29 02:30:08,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:30:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:30:09,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1209637900, now seen corresponding path program 2 times [2023-11-29 02:30:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173378877] [2023-11-29 02:30:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:09,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173378877] [2023-11-29 02:30:09,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173378877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:09,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93888195] [2023-11-29 02:30:09,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:09,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:09,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:30:09,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:09,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:30:09,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:09,422 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 [2023-11-29 02:30:09,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:30:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:09,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:09,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93888195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:09,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:09,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2023-11-29 02:30:09,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427630977] [2023-11-29 02:30:09,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:09,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:30:09,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:30:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:30:09,743 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:09,826 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-11-29 02:30:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:30:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 02:30:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:09,827 INFO L225 Difference]: With dead ends: 101 [2023-11-29 02:30:09,827 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 02:30:09,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:30:09,828 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:09,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 02:30:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2023-11-29 02:30:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 92 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2023-11-29 02:30:09,833 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 24 [2023-11-29 02:30:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:09,833 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2023-11-29 02:30:09,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2023-11-29 02:30:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 02:30:09,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:09,834 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1] [2023-11-29 02:30:09,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:30:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:30:10,037 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)] === [2023-11-29 02:30:10,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1474307132, now seen corresponding path program 1 times [2023-11-29 02:30:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803399907] [2023-11-29 02:30:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:30:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803399907] [2023-11-29 02:30:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803399907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732953710] [2023-11-29 02:30:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:10,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:10,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:10,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:10,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:30:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:10,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:30:10,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:30:10,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:30:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732953710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:10,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-11-29 02:30:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862949276] [2023-11-29 02:30:10,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:30:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:30:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:30:10,395 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2023-11-29 02:30:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:10,548 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2023-11-29 02:30:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:30:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 [2023-11-29 02:30:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:10,549 INFO L225 Difference]: With dead ends: 93 [2023-11-29 02:30:10,549 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 02:30:10,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:30:10,550 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:10,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 02:30:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2023-11-29 02:30:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 87 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2023-11-29 02:30:10,555 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 26 [2023-11-29 02:30:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:10,555 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2023-11-29 02:30:10,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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) [2023-11-29 02:30:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2023-11-29 02:30:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 02:30:10,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:10,557 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:30:10,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:30:10,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:30:10,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:10,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash 886822156, now seen corresponding path program 2 times [2023-11-29 02:30:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:10,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663400664] [2023-11-29 02:30:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 02:30:10,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663400664] [2023-11-29 02:30:10,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663400664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304447333] [2023-11-29 02:30:10,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:10,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:10,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:10,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:10,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:30:10,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:10,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:30:10,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:11,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:11,175 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 24 treesize of output 20 [2023-11-29 02:30:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304447333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:11,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:11,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-11-29 02:30:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139700049] [2023-11-29 02:30:11,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:11,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:30:11,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:30:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:30:11,287 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:11,441 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-11-29 02:30:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:30:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 02:30:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:11,443 INFO L225 Difference]: With dead ends: 98 [2023-11-29 02:30:11,443 INFO L226 Difference]: Without dead ends: 98 [2023-11-29 02:30:11,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:30:11,444 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 107 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 44 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-29 02:30:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2023-11-29 02:30:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 90 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-11-29 02:30:11,448 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 31 [2023-11-29 02:30:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:11,449 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-11-29 02:30:11,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-11-29 02:30:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:30:11,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:11,450 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 1, 1] [2023-11-29 02:30:11,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:30:11,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:30:11,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:11,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1216344948, now seen corresponding path program 2 times [2023-11-29 02:30:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:11,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127236210] [2023-11-29 02:30:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:11,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 21 proven. 114 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127236210] [2023-11-29 02:30:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127236210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753506277] [2023-11-29 02:30:11,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:11,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:11,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:11,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:30:11,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:11,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:30:11,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:12,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 02:30:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753506277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:12,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:12,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-29 02:30:12,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195677256] [2023-11-29 02:30:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:30:12,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:30:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:30:12,175 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:12,415 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2023-11-29 02:30:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:30:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 02:30:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:12,417 INFO L225 Difference]: With dead ends: 95 [2023-11-29 02:30:12,417 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 02:30:12,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:30:12,418 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:12,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 02:30:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2023-11-29 02:30:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 88 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2023-11-29 02:30:12,422 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 39 [2023-11-29 02:30:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:12,422 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2023-11-29 02:30:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:12,423 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2023-11-29 02:30:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 02:30:12,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:12,423 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-29 02:30:12,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:30:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:12,629 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:12,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -457683244, now seen corresponding path program 3 times [2023-11-29 02:30:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:12,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054250569] [2023-11-29 02:30:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 88 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:30:12,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054250569] [2023-11-29 02:30:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054250569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:12,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563670740] [2023-11-29 02:30:12,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:30:12,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:12,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:12,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:30:12,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:30:12,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:12,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:30:12,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:30:12,877 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 [2023-11-29 02:30:12,880 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 [2023-11-29 02:30:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-11-29 02:30:13,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:30:13,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563670740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:30:13,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:30:13,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-11-29 02:30:13,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845453862] [2023-11-29 02:30:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:30:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:30:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:30:13,111 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:13,152 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-11-29 02:30:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:30:13,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-29 02:30:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:13,153 INFO L225 Difference]: With dead ends: 87 [2023-11-29 02:30:13,153 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 02:30:13,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:30:13,154 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:13,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:30:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 02:30:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2023-11-29 02:30:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 57 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) [2023-11-29 02:30:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-11-29 02:30:13,157 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 47 [2023-11-29 02:30:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:13,158 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-11-29 02:30:13,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-11-29 02:30:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:30:13,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:13,159 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 1, 1] [2023-11-29 02:30:13,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:30:13,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:13,364 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:13,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2042091972, now seen corresponding path program 3 times [2023-11-29 02:30:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:13,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497301151] [2023-11-29 02:30:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 145 proven. 88 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-11-29 02:30:13,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497301151] [2023-11-29 02:30:13,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497301151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:13,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268215568] [2023-11-29 02:30:13,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:30:13,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:13,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:13,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:13,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:30:13,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:30:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:13,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:30:13,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:13,706 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 [2023-11-29 02:30:13,716 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 [2023-11-29 02:30:13,982 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 13 treesize of output 9 [2023-11-29 02:30:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-29 02:30:14,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-11-29 02:30:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268215568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:14,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:14,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-29 02:30:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338117808] [2023-11-29 02:30:14,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:30:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:30:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:30:14,597 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:15,167 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-11-29 02:30:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:30:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 02:30:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:15,168 INFO L225 Difference]: With dead ends: 57 [2023-11-29 02:30:15,168 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 02:30:15,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:30:15,169 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:15,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 02:30:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-29 02:30:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-29 02:30:15,172 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-11-29 02:30:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:15,172 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-29 02:30:15,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-29 02:30:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 02:30:15,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:15,173 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 3, 3, 3, 1, 1] [2023-11-29 02:30:15,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:30:15,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:15,374 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:15,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash -39028783, now seen corresponding path program 1 times [2023-11-29 02:30:15,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:15,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907303383] [2023-11-29 02:30:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:15,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 02:30:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907303383] [2023-11-29 02:30:15,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907303383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:15,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748440585] [2023-11-29 02:30:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:15,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:15,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:15,736 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:15,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:30:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:15,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:30:15,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:15,861 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 [2023-11-29 02:30:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 02:30:16,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 02:30:16,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748440585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:16,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:16,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-29 02:30:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326839036] [2023-11-29 02:30:16,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:16,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:30:16,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:30:16,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:30:16,478 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:16,801 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2023-11-29 02:30:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:30:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-29 02:30:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:16,803 INFO L225 Difference]: With dead ends: 81 [2023-11-29 02:30:16,803 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 02:30:16,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:30:16,804 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:16,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:30:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 02:30:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2023-11-29 02:30:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2023-11-29 02:30:16,807 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 56 [2023-11-29 02:30:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:16,808 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2023-11-29 02:30:16,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2023-11-29 02:30:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 02:30:16,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:16,809 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 4, 3, 3, 3, 1, 1] [2023-11-29 02:30:16,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 02:30:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:17,009 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:17,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:17,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1554330161, now seen corresponding path program 2 times [2023-11-29 02:30:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99745709] [2023-11-29 02:30:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 155 proven. 451 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 02:30:17,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99745709] [2023-11-29 02:30:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99745709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954852249] [2023-11-29 02:30:17,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:17,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:17,354 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:17,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:30:17,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:17,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:30:17,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 293 proven. 273 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-29 02:30:17,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 293 proven. 273 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-29 02:30:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954852249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:17,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 24 [2023-11-29 02:30:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075076090] [2023-11-29 02:30:17,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:17,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:30:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:17,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:30:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:30:17,825 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:18,180 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-11-29 02:30:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:30:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-29 02:30:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:18,182 INFO L225 Difference]: With dead ends: 97 [2023-11-29 02:30:18,182 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 02:30:18,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:30:18,183 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:18,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 8 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:30:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 02:30:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2023-11-29 02:30:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-11-29 02:30:18,186 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 74 [2023-11-29 02:30:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:18,187 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-11-29 02:30:18,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-11-29 02:30:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 02:30:18,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:18,188 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 5, 4, 4, 4, 1, 1] [2023-11-29 02:30:18,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:30:18,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:18,394 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:18,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1408809752, now seen corresponding path program 3 times [2023-11-29 02:30:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:18,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100847030] [2023-11-29 02:30:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:18,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 555 proven. 193 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-11-29 02:30:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100847030] [2023-11-29 02:30:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100847030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607997046] [2023-11-29 02:30:18,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:30:18,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:18,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:18,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:30:18,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 02:30:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:18,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:30:18,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 210 proven. 547 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-11-29 02:30:19,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-11-29 02:30:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607997046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:19,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:19,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2023-11-29 02:30:19,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867064460] [2023-11-29 02:30:19,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:19,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 02:30:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 02:30:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:30:19,560 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:20,385 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2023-11-29 02:30:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:30:20,385 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-29 02:30:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:20,386 INFO L225 Difference]: With dead ends: 96 [2023-11-29 02:30:20,386 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 02:30:20,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=901, Invalid=4069, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 02:30:20,389 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:20,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:30:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 02:30:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2023-11-29 02:30:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2023-11-29 02:30:20,392 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 90 [2023-11-29 02:30:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:20,392 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2023-11-29 02:30:20,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2023-11-29 02:30:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:30:20,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:20,393 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 5, 4, 4, 4, 1, 1] [2023-11-29 02:30:20,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:30:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:20,594 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:20,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1083310579, now seen corresponding path program 4 times [2023-11-29 02:30:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967232211] [2023-11-29 02:30:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:20,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 165 proven. 789 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 02:30:21,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967232211] [2023-11-29 02:30:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967232211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412330098] [2023-11-29 02:30:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:30:21,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:21,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:21,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:30:21,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:30:21,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:21,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:30:21,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 193 proven. 761 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 02:30:21,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 193 proven. 761 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 02:30:21,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412330098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:21,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:21,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2023-11-29 02:30:21,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306512657] [2023-11-29 02:30:21,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:21,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:30:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:21,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:30:21,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:30:21,911 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 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) [2023-11-29 02:30:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:22,984 INFO L93 Difference]: Finished difference Result 237 states and 258 transitions. [2023-11-29 02:30:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 02:30:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-29 02:30:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:22,986 INFO L225 Difference]: With dead ends: 237 [2023-11-29 02:30:22,986 INFO L226 Difference]: Without dead ends: 237 [2023-11-29 02:30:22,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 157 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2750, Invalid=7756, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 02:30:22,990 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:22,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:30:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-29 02:30:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2023-11-29 02:30:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.094420600858369) internal successors, (255), 233 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 255 transitions. [2023-11-29 02:30:22,996 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 255 transitions. Word has length 93 [2023-11-29 02:30:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:22,996 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 255 transitions. [2023-11-29 02:30:22,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 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) [2023-11-29 02:30:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 255 transitions. [2023-11-29 02:30:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-29 02:30:22,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:22,999 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 10, 9, 9, 9, 1, 1] [2023-11-29 02:30:23,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:30:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:23,199 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 652525681, now seen corresponding path program 5 times [2023-11-29 02:30:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:23,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084187318] [2023-11-29 02:30:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:23,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2463 proven. 138 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2023-11-29 02:30:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:24,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084187318] [2023-11-29 02:30:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084187318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:24,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235271033] [2023-11-29 02:30:24,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:30:24,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:24,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:24,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:24,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:30:24,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 02:30:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:24,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:30:24,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2387 proven. 255 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2023-11-29 02:30:24,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2451 proven. 191 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2023-11-29 02:30:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235271033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:24,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:24,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2023-11-29 02:30:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485429484] [2023-11-29 02:30:24,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:24,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:30:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:30:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:30:24,853 INFO L87 Difference]: Start difference. First operand 234 states and 255 transitions. Second operand has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:25,354 INFO L93 Difference]: Finished difference Result 234 states and 249 transitions. [2023-11-29 02:30:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:30:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 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 188 [2023-11-29 02:30:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:25,355 INFO L225 Difference]: With dead ends: 234 [2023-11-29 02:30:25,355 INFO L226 Difference]: Without dead ends: 234 [2023-11-29 02:30:25,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 353 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=672, Invalid=2408, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 02:30:25,357 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:25,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:30:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-29 02:30:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2023-11-29 02:30:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0686695278969958) internal successors, (249), 233 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2023-11-29 02:30:25,363 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 188 [2023-11-29 02:30:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:25,363 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2023-11-29 02:30:25,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.189189189189189) internal successors, (118), 37 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2023-11-29 02:30:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 02:30:25,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:25,366 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 10, 9, 9, 9, 1, 1] [2023-11-29 02:30:25,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:30:25,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:30:25,566 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:25,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:25,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1500698346, now seen corresponding path program 6 times [2023-11-29 02:30:25,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:25,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84577087] [2023-11-29 02:30:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:25,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 2940 proven. 195 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2023-11-29 02:30:26,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:26,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84577087] [2023-11-29 02:30:26,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84577087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:26,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104844545] [2023-11-29 02:30:26,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:30:26,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:26,544 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:26,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:30:27,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-29 02:30:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:27,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:30:27,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:27,506 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 [2023-11-29 02:30:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 813 proven. 1622 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2023-11-29 02:30:28,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 2435 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2023-11-29 02:30:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104844545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:29,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 44 [2023-11-29 02:30:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370441871] [2023-11-29 02:30:29,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:29,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:30:29,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:30:29,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:30:29,370 INFO L87 Difference]: Start difference. First operand 234 states and 249 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:33,622 INFO L93 Difference]: Finished difference Result 296 states and 318 transitions. [2023-11-29 02:30:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-11-29 02:30:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2023-11-29 02:30:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:33,624 INFO L225 Difference]: With dead ends: 296 [2023-11-29 02:30:33,624 INFO L226 Difference]: Without dead ends: 296 [2023-11-29 02:30:33,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5145 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3237, Invalid=14585, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 02:30:33,630 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 532 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:33,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 0 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:30:33,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-29 02:30:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2023-11-29 02:30:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0899653979238755) internal successors, (315), 289 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) [2023-11-29 02:30:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 315 transitions. [2023-11-29 02:30:33,637 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 315 transitions. Word has length 203 [2023-11-29 02:30:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:33,637 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 315 transitions. [2023-11-29 02:30:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 315 transitions. [2023-11-29 02:30:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-29 02:30:33,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:33,639 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 72, 11, 10, 10, 10, 1, 1] [2023-11-29 02:30:33,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:30:33,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:30:33,840 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:33,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1466265409, now seen corresponding path program 7 times [2023-11-29 02:30:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:33,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209811727] [2023-11-29 02:30:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5603 proven. 261 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2023-11-29 02:30:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209811727] [2023-11-29 02:30:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209811727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261996598] [2023-11-29 02:30:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:30:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:34,750 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:34,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:30:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:35,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:30:35,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5536 proven. 712 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2023-11-29 02:30:35,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5536 proven. 712 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2023-11-29 02:30:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261996598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:35,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 41 [2023-11-29 02:30:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234838885] [2023-11-29 02:30:35,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:30:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:30:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:30:35,681 INFO L87 Difference]: Start difference. First operand 290 states and 315 transitions. Second operand has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 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) [2023-11-29 02:30:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:36,842 INFO L93 Difference]: Finished difference Result 290 states and 310 transitions. [2023-11-29 02:30:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 02:30:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 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 261 [2023-11-29 02:30:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:36,844 INFO L225 Difference]: With dead ends: 290 [2023-11-29 02:30:36,844 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 02:30:36,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 495 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 02:30:36,846 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:36,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:30:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 02:30:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-11-29 02:30:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0726643598615917) internal successors, (310), 289 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) [2023-11-29 02:30:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 310 transitions. [2023-11-29 02:30:36,854 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 310 transitions. Word has length 261 [2023-11-29 02:30:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:36,855 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 310 transitions. [2023-11-29 02:30:36,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 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) [2023-11-29 02:30:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 310 transitions. [2023-11-29 02:30:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-29 02:30:36,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:36,858 INFO L195 NwaCegarLoop]: trace histogram [76, 76, 75, 11, 10, 10, 10, 1, 1] [2023-11-29 02:30:36,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:30:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:30:37,065 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:37,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2126598438, now seen corresponding path program 8 times [2023-11-29 02:30:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:37,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291067977] [2023-11-29 02:30:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6115 proven. 336 refuted. 0 times theorem prover too weak. 3049 trivial. 0 not checked. [2023-11-29 02:30:38,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:38,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291067977] [2023-11-29 02:30:38,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291067977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:38,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173148529] [2023-11-29 02:30:38,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:30:38,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:38,257 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:38,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:30:38,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:30:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:38,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:30:38,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6523 proven. 1030 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2023-11-29 02:30:38,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6523 proven. 1030 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2023-11-29 02:30:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173148529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:39,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:39,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 46 [2023-11-29 02:30:39,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790063662] [2023-11-29 02:30:39,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:39,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:30:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:30:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:30:39,363 INFO L87 Difference]: Start difference. First operand 290 states and 310 transitions. Second operand has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:40,947 INFO L93 Difference]: Finished difference Result 290 states and 306 transitions. [2023-11-29 02:30:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 02:30:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 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 270 [2023-11-29 02:30:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:40,950 INFO L225 Difference]: With dead ends: 290 [2023-11-29 02:30:40,950 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 02:30:40,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 509 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 02:30:40,951 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:40,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:30:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 02:30:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-11-29 02:30:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0588235294117647) internal successors, (306), 289 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 306 transitions. [2023-11-29 02:30:40,957 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 306 transitions. Word has length 270 [2023-11-29 02:30:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:40,957 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 306 transitions. [2023-11-29 02:30:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.6956521739130435) internal successors, (170), 46 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 306 transitions. [2023-11-29 02:30:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-29 02:30:40,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:40,959 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 77, 11, 10, 10, 10, 1, 1] [2023-11-29 02:30:40,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:30:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:30:41,161 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:41,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1709488232, now seen corresponding path program 9 times [2023-11-29 02:30:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117921579] [2023-11-29 02:30:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 7014 proven. 1633 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2023-11-29 02:30:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117921579] [2023-11-29 02:30:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117921579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16070685] [2023-11-29 02:30:42,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:30:42,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:42,047 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:42,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:30:42,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 02:30:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:42,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:30:42,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:42,538 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 [2023-11-29 02:30:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 0 proven. 2486 refuted. 0 times theorem prover too weak. 7493 trivial. 0 not checked. [2023-11-29 02:30:43,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 0 proven. 2486 refuted. 0 times theorem prover too weak. 7493 trivial. 0 not checked. [2023-11-29 02:30:44,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16070685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:44,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:44,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 44 [2023-11-29 02:30:44,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888881901] [2023-11-29 02:30:44,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:44,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 02:30:44,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:44,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 02:30:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 02:30:44,626 INFO L87 Difference]: Start difference. First operand 290 states and 306 transitions. Second operand has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:47,310 INFO L93 Difference]: Finished difference Result 353 states and 379 transitions. [2023-11-29 02:30:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 02:30:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2023-11-29 02:30:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:47,312 INFO L225 Difference]: With dead ends: 353 [2023-11-29 02:30:47,312 INFO L226 Difference]: Without dead ends: 353 [2023-11-29 02:30:47,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3685 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3827, Invalid=12429, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 02:30:47,313 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:47,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:30:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-29 02:30:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 316. [2023-11-29 02:30:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0603174603174603) internal successors, (334), 315 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 334 transitions. [2023-11-29 02:30:47,319 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 334 transitions. Word has length 276 [2023-11-29 02:30:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:47,319 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 334 transitions. [2023-11-29 02:30:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 334 transitions. [2023-11-29 02:30:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 02:30:47,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:47,321 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 90, 11, 10, 10, 10, 1, 1] [2023-11-29 02:30:47,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 02:30:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:47,521 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:30:47,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash -298061087, now seen corresponding path program 10 times [2023-11-29 02:30:47,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:47,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384805553] [2023-11-29 02:30:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 1131 proven. 11702 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2023-11-29 02:30:49,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:49,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384805553] [2023-11-29 02:30:49,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384805553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:49,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525194979] [2023-11-29 02:30:49,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:30:49,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:49,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:49,869 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:49,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:30:50,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:30:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:30:50,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:30:50,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 5339 proven. 6669 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2023-11-29 02:30:51,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 5339 proven. 6669 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2023-11-29 02:30:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525194979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:51,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:30:51,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 25, 25] total 71 [2023-11-29 02:30:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931984962] [2023-11-29 02:30:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 02:30:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 02:30:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4221, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 02:30:51,684 INFO L87 Difference]: Start difference. First operand 316 states and 334 transitions. Second operand has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:53,968 INFO L93 Difference]: Finished difference Result 439 states and 463 transitions. [2023-11-29 02:30:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 02:30:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2023-11-29 02:30:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:53,971 INFO L225 Difference]: With dead ends: 439 [2023-11-29 02:30:53,971 INFO L226 Difference]: Without dead ends: 439 [2023-11-29 02:30:53,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 592 SyntacticMatches, 17 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12198 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6495, Invalid=23607, Unknown=0, NotChecked=0, Total=30102 [2023-11-29 02:30:53,974 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 111 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:53,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 6 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:30:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-29 02:30:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 436. [2023-11-29 02:30:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0574712643678161) internal successors, (460), 435 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) [2023-11-29 02:30:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 460 transitions. [2023-11-29 02:30:53,981 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 460 transitions. Word has length 315 [2023-11-29 02:30:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:53,981 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 460 transitions. [2023-11-29 02:30:53,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:30:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 460 transitions. [2023-11-29 02:30:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-11-29 02:30:53,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:53,983 INFO L195 NwaCegarLoop]: trace histogram [121, 121, 120, 14, 13, 13, 13, 1, 1] [2023-11-29 02:30:53,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:30:54,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 02:30:54,184 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)] === [2023-11-29 02:30:54,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash -968725130, now seen corresponding path program 11 times [2023-11-29 02:30:54,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:54,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784418590] [2023-11-29 02:30:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:54,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 14249 proven. 513 refuted. 0 times theorem prover too weak. 8916 trivial. 0 not checked. [2023-11-29 02:30:55,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784418590] [2023-11-29 02:30:55,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784418590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:55,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809136927] [2023-11-29 02:30:55,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:30:55,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:55,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:55,705 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:55,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:31:05,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-11-29 02:31:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:31:05,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1390 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:31:05,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 15909 proven. 2164 refuted. 0 times theorem prover too weak. 5605 trivial. 0 not checked. [2023-11-29 02:31:06,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 16467 proven. 1606 refuted. 0 times theorem prover too weak. 5605 trivial. 0 not checked. [2023-11-29 02:31:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809136927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:31:06,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:31:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2023-11-29 02:31:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040818234] [2023-11-29 02:31:06,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:31:06,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 02:31:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:06,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 02:31:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 02:31:06,872 INFO L87 Difference]: Start difference. First operand 436 states and 460 transitions. Second operand has 63 states, 63 states have (on average 3.365079365079365) internal successors, (212), 63 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:09,136 INFO L93 Difference]: Finished difference Result 436 states and 455 transitions. [2023-11-29 02:31:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 02:31:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.365079365079365) internal successors, (212), 63 states have internal predecessors, (212), 0 states have call successors, (0), 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 417 [2023-11-29 02:31:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:09,138 INFO L225 Difference]: With dead ends: 436 [2023-11-29 02:31:09,138 INFO L226 Difference]: Without dead ends: 436 [2023-11-29 02:31:09,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 791 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3172, Invalid=13084, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 02:31:09,140 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:09,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:31:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-29 02:31:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2023-11-29 02:31:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0459770114942528) internal successors, (455), 435 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 455 transitions. [2023-11-29 02:31:09,146 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 455 transitions. Word has length 417 [2023-11-29 02:31:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:09,146 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 455 transitions. [2023-11-29 02:31:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.365079365079365) internal successors, (212), 63 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 455 transitions. [2023-11-29 02:31:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2023-11-29 02:31:09,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:09,149 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 123, 14, 13, 13, 13, 1, 1] [2023-11-29 02:31:09,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:31:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 02:31:09,349 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:31:09,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1339488367, now seen corresponding path program 12 times [2023-11-29 02:31:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828661766] [2023-11-29 02:31:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 15082 proven. 615 refuted. 0 times theorem prover too weak. 9118 trivial. 0 not checked. [2023-11-29 02:31:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828661766] [2023-11-29 02:31:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828661766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267536235] [2023-11-29 02:31:11,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:31:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:11,204 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:11,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:31:13,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2023-11-29 02:31:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:31:14,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 02:31:14,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:14,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:31:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 3980 proven. 7599 refuted. 0 times theorem prover too weak. 13236 trivial. 0 not checked. [2023-11-29 02:31:15,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 0 proven. 11579 refuted. 0 times theorem prover too weak. 13236 trivial. 0 not checked. [2023-11-29 02:31:17,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267536235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:31:17,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:31:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 21] total 71 [2023-11-29 02:31:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894625895] [2023-11-29 02:31:17,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:31:17,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 02:31:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 02:31:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=4087, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 02:31:17,979 INFO L87 Difference]: Start difference. First operand 436 states and 455 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:29,294 INFO L93 Difference]: Finished difference Result 716 states and 781 transitions. [2023-11-29 02:31:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-29 02:31:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 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 426 [2023-11-29 02:31:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:29,297 INFO L225 Difference]: With dead ends: 716 [2023-11-29 02:31:29,297 INFO L226 Difference]: Without dead ends: 716 [2023-11-29 02:31:29,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1078 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22541 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=11997, Invalid=56909, Unknown=0, NotChecked=0, Total=68906 [2023-11-29 02:31:29,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1322 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:29,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 0 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:31:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-29 02:31:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 604. [2023-11-29 02:31:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.0912106135986732) internal successors, (658), 603 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 658 transitions. [2023-11-29 02:31:29,308 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 658 transitions. Word has length 426 [2023-11-29 02:31:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:29,308 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 658 transitions. [2023-11-29 02:31:29,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 658 transitions. [2023-11-29 02:31:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2023-11-29 02:31:29,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:29,311 INFO L195 NwaCegarLoop]: trace histogram [172, 172, 171, 16, 15, 15, 15, 1, 1] [2023-11-29 02:31:29,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 02:31:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:31:29,512 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:31:29,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1057179297, now seen corresponding path program 13 times [2023-11-29 02:31:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104666747] [2023-11-29 02:31:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 32166 proven. 3553 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2023-11-29 02:31:31,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104666747] [2023-11-29 02:31:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104666747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131751081] [2023-11-29 02:31:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:31:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:31,429 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:31,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:31:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:31,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 2409 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:31:31,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 32517 proven. 3202 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2023-11-29 02:31:32,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 32517 proven. 3202 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2023-11-29 02:31:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131751081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:31:33,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:31:33,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 53 [2023-11-29 02:31:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492474166] [2023-11-29 02:31:33,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:31:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 02:31:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 02:31:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=2249, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 02:31:33,165 INFO L87 Difference]: Start difference. First operand 604 states and 658 transitions. Second operand has 54 states, 54 states have (on average 3.8518518518518516) internal successors, (208), 53 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) [2023-11-29 02:31:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:35,451 INFO L93 Difference]: Finished difference Result 604 states and 653 transitions. [2023-11-29 02:31:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 02:31:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.8518518518518516) internal successors, (208), 53 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 578 [2023-11-29 02:31:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:35,454 INFO L225 Difference]: With dead ends: 604 [2023-11-29 02:31:35,454 INFO L226 Difference]: Without dead ends: 604 [2023-11-29 02:31:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1270 GetRequests, 1116 SyntacticMatches, 12 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5418 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5336, Invalid=15256, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 02:31:35,457 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:35,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:31:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2023-11-29 02:31:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2023-11-29 02:31:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.0829187396351576) internal successors, (653), 603 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 653 transitions. [2023-11-29 02:31:35,467 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 653 transitions. Word has length 578 [2023-11-29 02:31:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:35,468 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 653 transitions. [2023-11-29 02:31:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.8518518518518516) internal successors, (208), 53 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) [2023-11-29 02:31:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 653 transitions. [2023-11-29 02:31:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-11-29 02:31:35,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:35,472 INFO L195 NwaCegarLoop]: trace histogram [173, 173, 172, 16, 15, 15, 15, 1, 1] [2023-11-29 02:31:35,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 02:31:35,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 02:31:35,673 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:31:35,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:35,673 INFO L85 PathProgramCache]: Analyzing trace with hash 426557242, now seen corresponding path program 14 times [2023-11-29 02:31:35,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:35,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817109656] [2023-11-29 02:31:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:35,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23017 proven. 16279 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2023-11-29 02:31:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817109656] [2023-11-29 02:31:37,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817109656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444169308] [2023-11-29 02:31:37,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:31:37,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:37,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:37,786 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:37,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:31:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:31:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:31:38,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 2420 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:31:38,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23057 proven. 16239 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2023-11-29 02:31:38,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23057 proven. 16239 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2023-11-29 02:31:39,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444169308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:31:39,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:31:39,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 60 [2023-11-29 02:31:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062562756] [2023-11-29 02:31:39,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:31:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 02:31:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 02:31:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=2907, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:31:39,540 INFO L87 Difference]: Start difference. First operand 604 states and 653 transitions. Second operand has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:42,003 INFO L93 Difference]: Finished difference Result 653 states and 703 transitions. [2023-11-29 02:31:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-11-29 02:31:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 581 [2023-11-29 02:31:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:42,021 INFO L225 Difference]: With dead ends: 653 [2023-11-29 02:31:42,021 INFO L226 Difference]: Without dead ends: 653 [2023-11-29 02:31:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1118 SyntacticMatches, 13 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10841 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6974, Invalid=24532, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 02:31:42,024 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 112 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:42,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 7 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:31:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-11-29 02:31:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 650. [2023-11-29 02:31:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.078582434514638) internal successors, (700), 649 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 700 transitions. [2023-11-29 02:31:42,037 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 700 transitions. Word has length 581 [2023-11-29 02:31:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:42,038 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 700 transitions. [2023-11-29 02:31:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 700 transitions. [2023-11-29 02:31:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-29 02:31:42,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:42,047 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 185, 17, 16, 16, 16, 1, 1] [2023-11-29 02:31:42,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:31:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 02:31:42,247 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:31:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1652501960, now seen corresponding path program 15 times [2023-11-29 02:31:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109202] [2023-11-29 02:31:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 39003 proven. 4423 refuted. 0 times theorem prover too weak. 11661 trivial. 0 not checked. [2023-11-29 02:31:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109202] [2023-11-29 02:31:44,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655614936] [2023-11-29 02:31:44,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:31:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:44,504 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:44,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:31:45,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-29 02:31:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:31:45,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:31:45,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:45,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:31:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 0 proven. 12374 refuted. 0 times theorem prover too weak. 42713 trivial. 0 not checked. [2023-11-29 02:31:48,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 0 proven. 12374 refuted. 0 times theorem prover too weak. 42713 trivial. 0 not checked. [2023-11-29 02:31:51,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655614936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:31:51,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:31:51,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 76 [2023-11-29 02:31:51,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47158658] [2023-11-29 02:31:51,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:31:51,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 02:31:51,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 02:31:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=4653, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 02:31:51,122 INFO L87 Difference]: Start difference. First operand 650 states and 700 transitions. Second operand has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:56,967 INFO L93 Difference]: Finished difference Result 808 states and 884 transitions. [2023-11-29 02:31:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-11-29 02:31:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 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 624 [2023-11-29 02:31:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:56,972 INFO L225 Difference]: With dead ends: 808 [2023-11-29 02:31:56,972 INFO L226 Difference]: Without dead ends: 808 [2023-11-29 02:31:56,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1421 GetRequests, 1199 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11939 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=12290, Invalid=37662, Unknown=0, NotChecked=0, Total=49952 [2023-11-29 02:31:56,974 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 307 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:56,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 0 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:31:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-11-29 02:31:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 658. [2023-11-29 02:31:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.0624048706240488) internal successors, (698), 657 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 698 transitions. [2023-11-29 02:31:56,985 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 698 transitions. Word has length 624 [2023-11-29 02:31:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:56,986 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 698 transitions. [2023-11-29 02:31:56,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:31:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 698 transitions. [2023-11-29 02:31:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2023-11-29 02:31:56,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:56,989 INFO L195 NwaCegarLoop]: trace histogram [197, 197, 196, 17, 16, 16, 16, 1, 1] [2023-11-29 02:31:56,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 02:31:57,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 02:31:57,190 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:31:57,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1101432417, now seen corresponding path program 16 times [2023-11-29 02:31:57,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:57,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975432365] [2023-11-29 02:31:57,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:57,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61566 backedges. 47280 proven. 6562 refuted. 0 times theorem prover too weak. 7724 trivial. 0 not checked. [2023-11-29 02:31:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975432365] [2023-11-29 02:31:59,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975432365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128438320] [2023-11-29 02:31:59,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:31:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:59,787 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:59,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:32:02,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:32:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:02,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 02:32:02,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 61566 backedges. 1912 proven. 56190 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2023-11-29 02:32:04,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61566 backedges. 1912 proven. 56190 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2023-11-29 02:32:06,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128438320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:06,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 51, 51] total 129 [2023-11-29 02:32:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263948773] [2023-11-29 02:32:06,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2023-11-29 02:32:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:06,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2023-11-29 02:32:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2952, Invalid=13818, Unknown=0, NotChecked=0, Total=16770 [2023-11-29 02:32:06,752 INFO L87 Difference]: Start difference. First operand 658 states and 698 transitions. Second operand has 130 states, 130 states have (on average 4.323076923076923) internal successors, (562), 129 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:37,272 INFO L93 Difference]: Finished difference Result 2105 states and 2304 transitions. [2023-11-29 02:32:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2023-11-29 02:32:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 4.323076923076923) internal successors, (562), 129 states have internal predecessors, (562), 0 states have call successors, (0), 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 657 [2023-11-29 02:32:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:37,279 INFO L225 Difference]: With dead ends: 2105 [2023-11-29 02:32:37,280 INFO L226 Difference]: Without dead ends: 2105 [2023-11-29 02:32:37,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1951 GetRequests, 1213 SyntacticMatches, 3 SemanticMatches, 735 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220454 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=66167, Invalid=476265, Unknown=0, NotChecked=0, Total=542432 [2023-11-29 02:32:37,301 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8876 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 8876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 8 Invalid, 9034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 8876 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 02:32:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2023-11-29 02:32:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1901. [2023-11-29 02:32:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.0889473684210527) internal successors, (2069), 1900 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2069 transitions. [2023-11-29 02:32:37,323 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2069 transitions. Word has length 657 [2023-11-29 02:32:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:37,323 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 2069 transitions. [2023-11-29 02:32:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 4.323076923076923) internal successors, (562), 129 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2069 transitions. [2023-11-29 02:32:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1441 [2023-11-29 02:32:37,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:37,336 INFO L195 NwaCegarLoop]: trace histogram [438, 438, 437, 32, 31, 31, 31, 1, 1] [2023-11-29 02:32:37,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 02:32:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:37,536 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:32:37,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash 451973889, now seen corresponding path program 17 times [2023-11-29 02:32:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:37,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633034243] [2023-11-29 02:32:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:37,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 302578 backedges. 108290 proven. 1260 refuted. 0 times theorem prover too weak. 193028 trivial. 0 not checked. [2023-11-29 02:32:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633034243] [2023-11-29 02:32:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633034243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:45,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795157773] [2023-11-29 02:32:45,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:32:45,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:45,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:45,117 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:45,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:33:40,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2023-11-29 02:33:40,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:40,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:33:40,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 302578 backedges. 162439 proven. 7310 refuted. 0 times theorem prover too weak. 132829 trivial. 0 not checked. [2023-11-29 02:33:41,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 302578 backedges. 164795 proven. 4954 refuted. 0 times theorem prover too weak. 132829 trivial. 0 not checked. [2023-11-29 02:33:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795157773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:42,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:42,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 98 [2023-11-29 02:33:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649976960] [2023-11-29 02:33:42,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:42,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 02:33:42,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 02:33:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1550, Invalid=7956, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 02:33:42,732 INFO L87 Difference]: Start difference. First operand 1901 states and 2069 transitions. Second operand has 98 states, 98 states have (on average 3.2755102040816326) internal successors, (321), 98 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) [2023-11-29 02:33:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:48,055 INFO L93 Difference]: Finished difference Result 1901 states and 2051 transitions. [2023-11-29 02:33:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-11-29 02:33:48,056 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.2755102040816326) internal successors, (321), 98 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) Word has length 1440 [2023-11-29 02:33:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:48,062 INFO L225 Difference]: With dead ends: 1901 [2023-11-29 02:33:48,062 INFO L226 Difference]: Without dead ends: 1901 [2023-11-29 02:33:48,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3040 GetRequests, 2813 SyntacticMatches, 8 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13211 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9130, Invalid=39490, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 02:33:48,065 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5667 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:48,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1 Invalid, 5686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5667 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 02:33:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2023-11-29 02:33:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1901. [2023-11-29 02:33:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.0794736842105264) internal successors, (2051), 1900 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2051 transitions. [2023-11-29 02:33:48,085 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2051 transitions. Word has length 1440 [2023-11-29 02:33:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:48,086 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 2051 transitions. [2023-11-29 02:33:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.2755102040816326) internal successors, (321), 98 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) [2023-11-29 02:33:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2051 transitions. [2023-11-29 02:33:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1486 [2023-11-29 02:33:48,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:48,099 INFO L195 NwaCegarLoop]: trace histogram [453, 453, 452, 32, 31, 31, 31, 1, 1] [2023-11-29 02:33:48,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:33:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 02:33:48,299 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:33:48,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1211008070, now seen corresponding path program 18 times [2023-11-29 02:33:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:48,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733681094] [2023-11-29 02:33:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:48,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 323068 backedges. 114649 proven. 1416 refuted. 0 times theorem prover too weak. 207003 trivial. 0 not checked. [2023-11-29 02:33:56,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733681094] [2023-11-29 02:33:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733681094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168098892] [2023-11-29 02:33:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:33:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:56,344 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:56,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:34:32,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2023-11-29 02:34:32,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:32,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 02:34:32,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:32,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:34:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 323068 backedges. 54968 proven. 44673 refuted. 0 times theorem prover too weak. 223427 trivial. 0 not checked. [2023-11-29 02:34:38,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 323068 backedges. 0 proven. 99641 refuted. 0 times theorem prover too weak. 223427 trivial. 0 not checked. [2023-11-29 02:34:44,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168098892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:44,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:44,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 25, 25] total 90 [2023-11-29 02:34:44,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203017428] [2023-11-29 02:34:44,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:44,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 02:34:44,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 02:34:44,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=6626, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 02:34:44,738 INFO L87 Difference]: Start difference. First operand 1901 states and 2051 transitions. Second operand has 90 states, 90 states have (on average 3.111111111111111) internal successors, (280), 90 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:02,150 INFO L93 Difference]: Finished difference Result 4570 states and 4995 transitions. [2023-11-29 02:35:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2023-11-29 02:35:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.111111111111111) internal successors, (280), 90 states have internal predecessors, (280), 0 states have call successors, (0), 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 1485 [2023-11-29 02:35:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:02,164 INFO L225 Difference]: With dead ends: 4570 [2023-11-29 02:35:02,164 INFO L226 Difference]: Without dead ends: 4570 [2023-11-29 02:35:02,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3268 GetRequests, 2921 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40033 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=17612, Invalid=103840, Unknown=0, NotChecked=0, Total=121452 [2023-11-29 02:35:02,170 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1652 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2639 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:02,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 0 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2639 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:35:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2023-11-29 02:35:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3288. [2023-11-29 02:35:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 1.0736233647703073) internal successors, (3529), 3287 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 3529 transitions. [2023-11-29 02:35:02,213 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 3529 transitions. Word has length 1485 [2023-11-29 02:35:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 3529 transitions. [2023-11-29 02:35:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.111111111111111) internal successors, (280), 90 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 3529 transitions. [2023-11-29 02:35:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1573 [2023-11-29 02:35:02,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:02,230 INFO L195 NwaCegarLoop]: trace histogram [482, 482, 481, 32, 31, 31, 31, 1, 1] [2023-11-29 02:35:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 02:35:02,431 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)] === [2023-11-29 02:35:02,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1832955989, now seen corresponding path program 19 times [2023-11-29 02:35:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:02,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497281471] [2023-11-29 02:35:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:02,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 364596 backedges. 172022 proven. 3651 refuted. 0 times theorem prover too weak. 188923 trivial. 0 not checked. [2023-11-29 02:35:12,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:12,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497281471] [2023-11-29 02:35:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497281471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:12,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932404719] [2023-11-29 02:35:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:35:12,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:12,004 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:12,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:35:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:13,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 6331 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:35:13,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 364596 backedges. 217983 proven. 10150 refuted. 0 times theorem prover too weak. 136463 trivial. 0 not checked. [2023-11-29 02:35:14,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 364596 backedges. 217983 proven. 10150 refuted. 0 times theorem prover too weak. 136463 trivial. 0 not checked. [2023-11-29 02:35:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932404719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:16,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38, 38] total 97 [2023-11-29 02:35:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487965216] [2023-11-29 02:35:16,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:16,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 02:35:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 02:35:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1466, Invalid=7846, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 02:35:16,506 INFO L87 Difference]: Start difference. First operand 3288 states and 3529 transitions. Second operand has 97 states, 97 states have (on average 3.783505154639175) internal successors, (367), 97 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:28,668 INFO L93 Difference]: Finished difference Result 2101 states and 2228 transitions. [2023-11-29 02:35:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2023-11-29 02:35:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.783505154639175) internal successors, (367), 97 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1572 [2023-11-29 02:35:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:28,675 INFO L225 Difference]: With dead ends: 2101 [2023-11-29 02:35:28,675 INFO L226 Difference]: Without dead ends: 2101 [2023-11-29 02:35:28,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3413 GetRequests, 3073 SyntacticMatches, 18 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28042 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=18152, Invalid=86500, Unknown=0, NotChecked=0, Total=104652 [2023-11-29 02:35:28,681 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8269 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 8269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:28,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 0 Invalid, 8302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 8269 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 02:35:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2023-11-29 02:35:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 2101. [2023-11-29 02:35:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 1.0609523809523809) internal successors, (2228), 2100 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2228 transitions. [2023-11-29 02:35:28,701 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2228 transitions. Word has length 1572 [2023-11-29 02:35:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:28,701 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 2228 transitions. [2023-11-29 02:35:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.783505154639175) internal successors, (367), 97 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2228 transitions. [2023-11-29 02:35:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1639 [2023-11-29 02:35:28,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:28,716 INFO L195 NwaCegarLoop]: trace histogram [504, 504, 503, 32, 31, 31, 31, 1, 1] [2023-11-29 02:35:28,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:35:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 02:35:28,917 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:35:28,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1554238377, now seen corresponding path program 20 times [2023-11-29 02:35:28,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890836787] [2023-11-29 02:35:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 397783 backedges. 167168 proven. 1938 refuted. 0 times theorem prover too weak. 228677 trivial. 0 not checked. [2023-11-29 02:35:39,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:39,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890836787] [2023-11-29 02:35:39,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890836787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:39,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947020938] [2023-11-29 02:35:39,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:35:39,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:39,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:39,490 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:39,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:35:40,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:35:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:40,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 6573 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 02:35:40,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 397783 backedges. 263543 proven. 13738 refuted. 0 times theorem prover too weak. 120502 trivial. 0 not checked. [2023-11-29 02:35:42,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 397783 backedges. 263543 proven. 13738 refuted. 0 times theorem prover too weak. 120502 trivial. 0 not checked. [2023-11-29 02:35:44,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947020938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:44,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 42, 42] total 106 [2023-11-29 02:35:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316564743] [2023-11-29 02:35:44,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:44,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 02:35:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 02:35:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=9406, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 02:35:44,406 INFO L87 Difference]: Start difference. First operand 2101 states and 2228 transitions. Second operand has 106 states, 106 states have (on average 3.7547169811320753) internal successors, (398), 106 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:59,707 INFO L93 Difference]: Finished difference Result 2101 states and 2212 transitions. [2023-11-29 02:35:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2023-11-29 02:35:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.7547169811320753) internal successors, (398), 106 states have internal predecessors, (398), 0 states have call successors, (0), 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 1638 [2023-11-29 02:35:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:59,714 INFO L225 Difference]: With dead ends: 2101 [2023-11-29 02:35:59,714 INFO L226 Difference]: Without dead ends: 2101 [2023-11-29 02:35:59,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3571 GetRequests, 3197 SyntacticMatches, 20 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34190 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=21472, Invalid=104908, Unknown=0, NotChecked=0, Total=126380 [2023-11-29 02:35:59,719 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12020 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 12020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:59,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 12046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 12020 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:35:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2023-11-29 02:35:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 2101. [2023-11-29 02:35:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 1.0533333333333332) internal successors, (2212), 2100 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2212 transitions. [2023-11-29 02:35:59,738 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2212 transitions. Word has length 1638 [2023-11-29 02:35:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:59,738 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 2212 transitions. [2023-11-29 02:35:59,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.7547169811320753) internal successors, (398), 106 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2212 transitions. [2023-11-29 02:35:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1669 [2023-11-29 02:35:59,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:59,754 INFO L195 NwaCegarLoop]: trace histogram [514, 514, 513, 32, 31, 31, 31, 1, 1] [2023-11-29 02:35:59,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:59,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:59,954 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:35:59,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:59,955 INFO L85 PathProgramCache]: Analyzing trace with hash 755261457, now seen corresponding path program 21 times [2023-11-29 02:35:59,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:59,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863629319] [2023-11-29 02:35:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 413348 backedges. 173385 proven. 2130 refuted. 0 times theorem prover too weak. 237833 trivial. 0 not checked. [2023-11-29 02:36:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:11,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863629319] [2023-11-29 02:36:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863629319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189843200] [2023-11-29 02:36:11,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:36:11,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:11,007 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:11,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:36:15,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-29 02:36:15,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:15,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 02:36:15,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:15,620 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 [2023-11-29 02:36:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 413348 backedges. 103426 proven. 56324 refuted. 0 times theorem prover too weak. 253598 trivial. 0 not checked. [2023-11-29 02:36:22,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 413348 backedges. 30 proven. 159720 refuted. 0 times theorem prover too weak. 253598 trivial. 0 not checked. [2023-11-29 02:36:30,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189843200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:30,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:30,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 35, 35] total 118 [2023-11-29 02:36:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933641375] [2023-11-29 02:36:30,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 02:36:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 02:36:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2036, Invalid=11770, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 02:36:30,334 INFO L87 Difference]: Start difference. First operand 2101 states and 2212 transitions. Second operand has 118 states, 118 states have (on average 3.152542372881356) internal successors, (372), 118 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:54,202 INFO L93 Difference]: Finished difference Result 5237 states and 5616 transitions. [2023-11-29 02:36:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 334 states. [2023-11-29 02:36:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.152542372881356) internal successors, (372), 118 states have internal predecessors, (372), 0 states have call successors, (0), 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 1668 [2023-11-29 02:36:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:54,219 INFO L225 Difference]: With dead ends: 5237 [2023-11-29 02:36:54,219 INFO L226 Difference]: Without dead ends: 5237 [2023-11-29 02:36:54,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3713 GetRequests, 3267 SyntacticMatches, 0 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66859 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=27493, Invalid=172763, Unknown=0, NotChecked=0, Total=200256 [2023-11-29 02:36:54,226 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1932 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4012 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1932 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 4012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:54,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1932 Valid, 0 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 4012 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:36:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2023-11-29 02:36:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 3488. [2023-11-29 02:36:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 1.055348437051907) internal successors, (3680), 3487 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 3680 transitions. [2023-11-29 02:36:54,265 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 3680 transitions. Word has length 1668 [2023-11-29 02:36:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:54,266 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 3680 transitions. [2023-11-29 02:36:54,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.152542372881356) internal successors, (372), 118 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 3680 transitions. [2023-11-29 02:36:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2023-11-29 02:36:54,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:54,283 INFO L195 NwaCegarLoop]: trace histogram [532, 532, 531, 32, 31, 31, 31, 1, 1] [2023-11-29 02:36:54,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:36:54,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:54,484 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:36:54,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:54,484 INFO L85 PathProgramCache]: Analyzing trace with hash 536822933, now seen corresponding path program 22 times [2023-11-29 02:36:54,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:54,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540283301] [2023-11-29 02:36:54,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:54,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 442121 backedges. 229689 proven. 5389 refuted. 0 times theorem prover too weak. 207043 trivial. 0 not checked. [2023-11-29 02:37:06,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540283301] [2023-11-29 02:37:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540283301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941448428] [2023-11-29 02:37:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:37:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:06,594 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:37:25,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:37:25,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:26,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 6881 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 02:37:26,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 442121 backedges. 355600 proven. 22573 refuted. 0 times theorem prover too weak. 63948 trivial. 0 not checked. [2023-11-29 02:37:28,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 442121 backedges. 355600 proven. 22573 refuted. 0 times theorem prover too weak. 63948 trivial. 0 not checked. [2023-11-29 02:37:30,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941448428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:30,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:30,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 49] total 122 [2023-11-29 02:37:30,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28304904] [2023-11-29 02:37:30,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-11-29 02:37:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-11-29 02:37:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2277, Invalid=12485, Unknown=0, NotChecked=0, Total=14762 [2023-11-29 02:37:30,877 INFO L87 Difference]: Start difference. First operand 3488 states and 3680 transitions. Second operand has 122 states, 122 states have (on average 3.9262295081967213) internal successors, (479), 122 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:58,096 INFO L93 Difference]: Finished difference Result 2392 states and 2455 transitions. [2023-11-29 02:37:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2023-11-29 02:37:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.9262295081967213) internal successors, (479), 122 states have internal predecessors, (479), 0 states have call successors, (0), 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 1722 [2023-11-29 02:37:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:58,104 INFO L225 Difference]: With dead ends: 2392 [2023-11-29 02:37:58,104 INFO L226 Difference]: Without dead ends: 2392 [2023-11-29 02:37:58,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3867 GetRequests, 3352 SyntacticMatches, 22 SemanticMatches, 493 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66729 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=43137, Invalid=201393, Unknown=0, NotChecked=0, Total=244530 [2023-11-29 02:37:58,114 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16888 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 16888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:58,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 16927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 16888 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 02:37:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2023-11-29 02:37:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2392. [2023-11-29 02:37:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 1.0267670430782099) internal successors, (2455), 2391 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 2455 transitions. [2023-11-29 02:37:58,135 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 2455 transitions. Word has length 1722 [2023-11-29 02:37:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:58,135 INFO L495 AbstractCegarLoop]: Abstraction has 2392 states and 2455 transitions. [2023-11-29 02:37:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.9262295081967213) internal successors, (479), 122 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 2455 transitions. [2023-11-29 02:37:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1783 [2023-11-29 02:37:58,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:58,152 INFO L195 NwaCegarLoop]: trace histogram [552, 552, 551, 32, 31, 31, 31, 1, 1] [2023-11-29 02:37:58,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:37:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:58,353 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 02:37:58,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1149961093, now seen corresponding path program 23 times [2023-11-29 02:37:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:58,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799124659] [2023-11-29 02:37:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 475231 backedges. 363453 proven. 24553 refuted. 0 times theorem prover too weak. 87225 trivial. 0 not checked. [2023-11-29 02:38:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799124659] [2023-11-29 02:38:10,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799124659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:10,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866705859] [2023-11-29 02:38:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:38:10,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:10,370 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:10,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1bf410f3-f55a-4611-93ae-76b0f1f6c05f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process