./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --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_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/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_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/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_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:22:13,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:22:13,316 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:22:13,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:22:13,322 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:22:13,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:22:13,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:22:13,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:22:13,348 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:22:13,348 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:22:13,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:22:13,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:22:13,350 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:22:13,351 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:22:13,351 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:22:13,352 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:22:13,352 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:22:13,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:22:13,353 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:22:13,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:22:13,354 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:22:13,356 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:22:13,357 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:22:13,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:22:13,358 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:22:13,358 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:22:13,358 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:22:13,359 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:22:13,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:22:13,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:22:13,360 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:22:13,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:22:13,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:22:13,361 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:22:13,361 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:22:13,361 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:22:13,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:22:13,362 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:22:13,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:22:13,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:22:13,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:22:13,364 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_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2023-11-29 00:22:13,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:22:13,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:22:13,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:22:13,616 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:22:13,617 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:22:13,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2023-11-29 00:22:16,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:22:16,742 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:22:16,743 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2023-11-29 00:22:16,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/data/9eda667df/e677de38723641858e9e91bddd671d94/FLAG1d5c838eb [2023-11-29 00:22:16,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/data/9eda667df/e677de38723641858e9e91bddd671d94 [2023-11-29 00:22:16,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:22:16,773 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:22:16,774 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:22:16,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:22:16,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:22:16,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:22:16" (1/1) ... [2023-11-29 00:22:16,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697681a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:16, skipping insertion in model container [2023-11-29 00:22:16,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:22:16" (1/1) ... [2023-11-29 00:22:16,823 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:22:17,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:22:17,071 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:22:17,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:22:17,131 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:22:17,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17 WrapperNode [2023-11-29 00:22:17,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:22:17,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:22:17,133 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:22:17,133 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:22:17,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,171 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2023-11-29 00:22:17,171 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:22:17,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:22:17,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:22:17,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:22:17,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,201 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2023-11-29 00:22:17,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:22:17,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:22:17,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:22:17,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:22:17,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (1/1) ... [2023-11-29 00:22:17,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:22:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:17,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:22:17,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:22:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:22:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:22:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:22:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:22:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:22:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:22:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:22:17,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:22:17,390 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:22:17,392 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:22:17,562 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:22:17,599 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:22:17,599 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 00:22:17,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:22:17 BoogieIcfgContainer [2023-11-29 00:22:17,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:22:17,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:22:17,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:22:17,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:22:17,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:22:16" (1/3) ... [2023-11-29 00:22:17,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc643db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:22:17, skipping insertion in model container [2023-11-29 00:22:17,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:22:17" (2/3) ... [2023-11-29 00:22:17,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc643db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:22:17, skipping insertion in model container [2023-11-29 00:22:17,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:22:17" (3/3) ... [2023-11-29 00:22:17,610 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2023-11-29 00:22:17,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:22:17,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-11-29 00:22:17,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:22:17,678 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;@6e6a38fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:22:17,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-29 00:22:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 2.090909090909091) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:22:17,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:17,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:22:17,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:17,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash -310554848, now seen corresponding path program 1 times [2023-11-29 00:22:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378096789] [2023-11-29 00:22:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,006 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 00:22:18,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:18,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378096789] [2023-11-29 00:22:18,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378096789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:18,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:18,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:22:18,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330043696] [2023-11-29 00:22:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:22:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:18,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:22:18,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:22:18,045 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 2.090909090909091) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:18,091 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-29 00:22:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:22:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 00:22:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:18,100 INFO L225 Difference]: With dead ends: 34 [2023-11-29 00:22:18,100 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 00:22:18,102 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 00:22:18,105 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:18,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 00:22:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-29 00:22:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 32 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 00:22:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-29 00:22:18,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 6 [2023-11-29 00:22:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:18,133 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-29 00:22:18,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-29 00:22:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:22:18,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:18,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:22:18,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:22:18,135 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:18,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -310554847, now seen corresponding path program 1 times [2023-11-29 00:22:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651132497] [2023-11-29 00:22:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,413 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 00:22:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651132497] [2023-11-29 00:22:18,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651132497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:18,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:18,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:22:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363049915] [2023-11-29 00:22:18,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:18,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:18,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:18,418 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:18,529 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-11-29 00:22:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:22:18,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 00:22:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:18,531 INFO L225 Difference]: With dead ends: 66 [2023-11-29 00:22:18,531 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 00:22:18,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:18,533 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 38 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 121 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 00:22:18,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 121 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 00:22:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2023-11-29 00:22:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 36 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 00:22:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-11-29 00:22:18,541 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2023-11-29 00:22:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:18,541 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-11-29 00:22:18,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-11-29 00:22:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:22:18,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:18,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:22:18,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:22:18,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:18,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -308707805, now seen corresponding path program 1 times [2023-11-29 00:22:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166006127] [2023-11-29 00:22:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,757 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 00:22:18,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:18,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166006127] [2023-11-29 00:22:18,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166006127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:18,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:18,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:22:18,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620102886] [2023-11-29 00:22:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:18,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:18,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:18,761 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:18,811 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-29 00:22:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 00:22:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:18,812 INFO L225 Difference]: With dead ends: 39 [2023-11-29 00:22:18,812 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 00:22:18,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:18,814 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:18,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 46 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 00:22:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-11-29 00:22:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-29 00:22:18,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2023-11-29 00:22:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:18,821 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-29 00:22:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-29 00:22:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 00:22:18,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:18,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:22:18,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:18,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2090382119, now seen corresponding path program 1 times [2023-11-29 00:22:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:18,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183231192] [2023-11-29 00:22:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:22:18,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:18,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183231192] [2023-11-29 00:22:18,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183231192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:18,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947228022] [2023-11-29 00:22:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:18,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:18,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:18,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:22:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:18,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:22:18,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:22:19,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947228022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:19,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:19,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:22:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014907772] [2023-11-29 00:22:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:19,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:19,016 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:19,068 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2023-11-29 00:22:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 00:22:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:19,070 INFO L225 Difference]: With dead ends: 66 [2023-11-29 00:22:19,070 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 00:22:19,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:19,071 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:19,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 00:22:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 40. [2023-11-29 00:22:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 39 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 00:22:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-11-29 00:22:19,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 8 [2023-11-29 00:22:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:19,078 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-11-29 00:22:19,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-11-29 00:22:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 00:22:19,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:19,079 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:19,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:19,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:19,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash -315374757, now seen corresponding path program 1 times [2023-11-29 00:22:19,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:19,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519904141] [2023-11-29 00:22:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:19,500 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 00:22:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519904141] [2023-11-29 00:22:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519904141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911103900] [2023-11-29 00:22:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:19,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:19,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:22:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:19,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:22:19,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:19,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:22:19,638 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 7 [2023-11-29 00:22:19,648 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 00:22:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:22:19,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:20,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:22:20,040 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 00:22:20,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911103900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:20,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:20,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-29 00:22:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453503341] [2023-11-29 00:22:20,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:22:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:22:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:20,043 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 00:22:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:20,246 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-29 00:22:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 00:22:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:20,248 INFO L225 Difference]: With dead ends: 39 [2023-11-29 00:22:20,248 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 00:22:20,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:22:20,249 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:20,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 145 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 00:22:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-11-29 00:22:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 37 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 00:22:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-29 00:22:20,255 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 8 [2023-11-29 00:22:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:20,255 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-29 00:22:20,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 00:22:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-29 00:22:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:22:20,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:20,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:20,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:22:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:20,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1187426628, now seen corresponding path program 1 times [2023-11-29 00:22:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067594139] [2023-11-29 00:22:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:20,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067594139] [2023-11-29 00:22:20,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067594139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:20,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:20,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:22:20,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808856219] [2023-11-29 00:22:20,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:22:20,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:22:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:22:20,504 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:20,524 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-29 00:22:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:22:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:22:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:20,525 INFO L225 Difference]: With dead ends: 36 [2023-11-29 00:22:20,525 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 00:22:20,525 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 00:22:20,526 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:20,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 00:22:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 00:22:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 35 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 00:22:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-29 00:22:20,531 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2023-11-29 00:22:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:20,531 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-29 00:22:20,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-29 00:22:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:22:20,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:20,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:20,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:22:20,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:20,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1187426629, now seen corresponding path program 1 times [2023-11-29 00:22:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140568473] [2023-11-29 00:22:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:20,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140568473] [2023-11-29 00:22:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140568473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:20,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:20,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085364291] [2023-11-29 00:22:20,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:20,690 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:20,765 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2023-11-29 00:22:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:22:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:20,767 INFO L225 Difference]: With dead ends: 69 [2023-11-29 00:22:20,768 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 00:22:20,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:20,769 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:20,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 98 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 00:22:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2023-11-29 00:22:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-11-29 00:22:20,775 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2023-11-29 00:22:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:20,775 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-11-29 00:22:20,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-11-29 00:22:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:22:20,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:20,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:20,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:22:20,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:20,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash 378080003, now seen corresponding path program 1 times [2023-11-29 00:22:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:20,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353279483] [2023-11-29 00:22:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:20,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:20,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353279483] [2023-11-29 00:22:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353279483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:20,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738681314] [2023-11-29 00:22:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:20,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:20,945 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:21,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:21,023 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-11-29 00:22:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:21,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:22:21,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:21,024 INFO L225 Difference]: With dead ends: 54 [2023-11-29 00:22:21,024 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 00:22:21,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:21,025 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:21,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 40 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 00:22:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-29 00:22:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 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 00:22:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-29 00:22:21,030 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 10 [2023-11-29 00:22:21,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:21,031 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-29 00:22:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-29 00:22:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:22:21,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:21,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:22:21,032 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:21,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:21,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1344245526, now seen corresponding path program 1 times [2023-11-29 00:22:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480117837] [2023-11-29 00:22:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480117837] [2023-11-29 00:22:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480117837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:21,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603826152] [2023-11-29 00:22:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:21,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:21,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:22:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:21,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:22:21,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:21,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603826152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:21,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:22:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922035289] [2023-11-29 00:22:21,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:21,197 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:21,234 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-11-29 00:22:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:22:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:21,235 INFO L225 Difference]: With dead ends: 69 [2023-11-29 00:22:21,235 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 00:22:21,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:21,236 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:21,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 00:22:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2023-11-29 00:22:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-29 00:22:21,241 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2023-11-29 00:22:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:21,241 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-29 00:22:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-29 00:22:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:22:21,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:21,242 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:21,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:22:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:21,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:21,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1737272536, now seen corresponding path program 1 times [2023-11-29 00:22:21,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544894987] [2023-11-29 00:22:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544894987] [2023-11-29 00:22:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544894987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051020380] [2023-11-29 00:22:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:21,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:21,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:21,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:22:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:21,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:22:21,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:21,738 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 7 [2023-11-29 00:22:21,746 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 8 treesize of output 1 [2023-11-29 00:22:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:21,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051020380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:22,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:22,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-29 00:22:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315079724] [2023-11-29 00:22:22,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:22,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:22:22,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:22:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:22:22,202 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:22,380 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-11-29 00:22:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:22:22,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:22:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:22,381 INFO L225 Difference]: With dead ends: 52 [2023-11-29 00:22:22,381 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 00:22:22,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:22:22,382 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:22,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 91 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 00:22:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-11-29 00:22:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 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 00:22:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-11-29 00:22:22,386 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 12 [2023-11-29 00:22:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:22,386 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-11-29 00:22:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-11-29 00:22:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:22:22,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:22,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:22,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:22:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:22:22,591 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:22,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1278060003, now seen corresponding path program 1 times [2023-11-29 00:22:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:22,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317267544] [2023-11-29 00:22:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:22,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:22,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317267544] [2023-11-29 00:22:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317267544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:22,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500866872] [2023-11-29 00:22:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:22,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:22,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:22,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:22:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:22,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:22:22,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:22,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:22,881 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 00:22:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500866872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:22,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:22,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 00:22:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171589796] [2023-11-29 00:22:22,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:22:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:22:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:22,930 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:23,042 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2023-11-29 00:22:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 00:22:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:23,043 INFO L225 Difference]: With dead ends: 81 [2023-11-29 00:22:23,043 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 00:22:23,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:22:23,044 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:23,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 102 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 00:22:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2023-11-29 00:22:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-11-29 00:22:23,048 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2023-11-29 00:22:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:23,048 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-11-29 00:22:23,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-11-29 00:22:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 00:22:23,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:23,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:23,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:22:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:22:23,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1536225441, now seen corresponding path program 1 times [2023-11-29 00:22:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:23,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104844545] [2023-11-29 00:22:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:23,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104844545] [2023-11-29 00:22:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104844545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:23,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:23,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400355976] [2023-11-29 00:22:23,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:23,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:23,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:23,347 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 00:22:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:23,389 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2023-11-29 00:22:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 13 [2023-11-29 00:22:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:23,390 INFO L225 Difference]: With dead ends: 62 [2023-11-29 00:22:23,391 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 00:22:23,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:23,391 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:23,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 00:22:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2023-11-29 00:22:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 49 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 00:22:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-29 00:22:23,395 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 13 [2023-11-29 00:22:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:23,395 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-29 00:22:23,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 00:22:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-29 00:22:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 00:22:23,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:23,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:23,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:22:23,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:23,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1223319862, now seen corresponding path program 1 times [2023-11-29 00:22:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:23,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360613319] [2023-11-29 00:22:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:23,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:23,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:23,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360613319] [2023-11-29 00:22:23,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360613319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:23,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:23,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:23,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431317735] [2023-11-29 00:22:23,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:23,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:23,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:23,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:23,517 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:23,563 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2023-11-29 00:22:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:23,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 00:22:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:23,564 INFO L225 Difference]: With dead ends: 50 [2023-11-29 00:22:23,564 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 00:22:23,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:23,565 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:23,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 00:22:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-11-29 00:22:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-11-29 00:22:23,568 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 14 [2023-11-29 00:22:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:23,568 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-11-29 00:22:23,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-11-29 00:22:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:22:23,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:23,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:23,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:22:23,570 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:23,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash -199478638, now seen corresponding path program 1 times [2023-11-29 00:22:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:23,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998650254] [2023-11-29 00:22:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:23,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:23,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998650254] [2023-11-29 00:22:23,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998650254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:22:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437178432] [2023-11-29 00:22:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:22:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:22:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:22:23,647 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 00:22:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:23,688 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-29 00:22:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 16 [2023-11-29 00:22:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:23,689 INFO L225 Difference]: With dead ends: 45 [2023-11-29 00:22:23,689 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 00:22:23,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:22:23,690 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:23,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 50 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 00:22:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 00:22:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-29 00:22:23,693 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2023-11-29 00:22:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:23,693 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-29 00:22:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 00:22:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-29 00:22:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:22:23,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:23,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:22:23,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:23,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -199478637, now seen corresponding path program 1 times [2023-11-29 00:22:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375125763] [2023-11-29 00:22:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375125763] [2023-11-29 00:22:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375125763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300195019] [2023-11-29 00:22:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:23,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:23,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:23,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:22:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:23,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:22:23,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:23,961 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 00:22:23,962 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-29 00:22:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:24,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300195019] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:24,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:22:24,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 19 [2023-11-29 00:22:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940206791] [2023-11-29 00:22:24,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:24,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:22:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:22:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:22:24,397 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 00:22:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:24,554 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-29 00:22:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 16 [2023-11-29 00:22:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:24,555 INFO L225 Difference]: With dead ends: 72 [2023-11-29 00:22:24,556 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 00:22:24,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:22:24,557 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:24,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 151 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 00:22:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2023-11-29 00:22:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2023-11-29 00:22:24,560 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2023-11-29 00:22:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:24,560 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2023-11-29 00:22:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 00:22:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2023-11-29 00:22:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 00:22:24,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:24,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:24,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:22:24,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:22:24,766 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:24,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1479342315, now seen corresponding path program 1 times [2023-11-29 00:22:24,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:24,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013252197] [2023-11-29 00:22:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013252197] [2023-11-29 00:22:24,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013252197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970610781] [2023-11-29 00:22:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:24,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:24,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:24,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:22:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:24,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:22:24,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:25,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:25,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:22:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970610781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:25,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 00:22:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964200156] [2023-11-29 00:22:25,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:22:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:22:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:22:25,158 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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 00:22:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:25,278 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-11-29 00:22:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:22:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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) Word has length 16 [2023-11-29 00:22:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:25,279 INFO L225 Difference]: With dead ends: 63 [2023-11-29 00:22:25,280 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 00:22:25,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:25,280 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:25,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 00:22:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2023-11-29 00:22:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-11-29 00:22:25,283 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 16 [2023-11-29 00:22:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:25,283 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-11-29 00:22:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 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 00:22:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-11-29 00:22:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:22:25,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:25,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:25,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:22:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:22:25,487 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:25,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:25,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1568104809, now seen corresponding path program 1 times [2023-11-29 00:22:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:25,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242290140] [2023-11-29 00:22:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242290140] [2023-11-29 00:22:25,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242290140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:25,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:25,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:22:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109398002] [2023-11-29 00:22:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:22:25,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:22:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:22:25,587 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 00:22:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:25,672 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2023-11-29 00:22:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:22:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 19 [2023-11-29 00:22:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:25,673 INFO L225 Difference]: With dead ends: 49 [2023-11-29 00:22:25,673 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 00:22:25,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:22:25,673 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 69 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 00:22:25,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 00:22:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-11-29 00:22:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.255813953488372) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-11-29 00:22:25,676 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 19 [2023-11-29 00:22:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:25,676 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-11-29 00:22:25,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 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 00:22:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-11-29 00:22:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:22:25,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:25,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:25,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 00:22:25,678 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:25,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1568104810, now seen corresponding path program 1 times [2023-11-29 00:22:25,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:25,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156678585] [2023-11-29 00:22:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:25,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156678585] [2023-11-29 00:22:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156678585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922014914] [2023-11-29 00:22:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:25,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:25,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:22:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:25,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:22:25,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:26,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:26,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 00:22:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922014914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:26,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 00:22:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936354532] [2023-11-29 00:22:26,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:22:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:22:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:26,091 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:26,233 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2023-11-29 00:22:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:22:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 00:22:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:26,234 INFO L225 Difference]: With dead ends: 50 [2023-11-29 00:22:26,234 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 00:22:26,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:22:26,235 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:26,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 101 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 00:22:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-29 00:22:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 47 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 00:22:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-11-29 00:22:26,238 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 19 [2023-11-29 00:22:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:26,238 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-11-29 00:22:26,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-11-29 00:22:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 00:22:26,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:26,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:26,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:22:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:22:26,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:26,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1366571167, now seen corresponding path program 1 times [2023-11-29 00:22:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:26,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153622893] [2023-11-29 00:22:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:22:26,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153622893] [2023-11-29 00:22:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153622893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:26,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:26,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:22:26,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573047161] [2023-11-29 00:22:26,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:26,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:22:26,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:22:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:22:26,554 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:26,572 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-11-29 00:22:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:22:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 00:22:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:26,573 INFO L225 Difference]: With dead ends: 47 [2023-11-29 00:22:26,573 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 00:22:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:22:26,574 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 00:22:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 00:22:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 00:22:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-11-29 00:22:26,576 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 20 [2023-11-29 00:22:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:26,576 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-11-29 00:22:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-11-29 00:22:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 00:22:26,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:26,577 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 00:22:26,578 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:26,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash -947967952, now seen corresponding path program 1 times [2023-11-29 00:22:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245685913] [2023-11-29 00:22:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245685913] [2023-11-29 00:22:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245685913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006359145] [2023-11-29 00:22:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:26,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:26,784 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:26,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:22:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:26,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:22:26,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:26,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:22:26,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:26,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006359145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:26,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:26,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 10 [2023-11-29 00:22:26,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433429012] [2023-11-29 00:22:26,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:26,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:26,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:26,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:22:26,914 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:26,998 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-11-29 00:22:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:22:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 00:22:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:26,999 INFO L225 Difference]: With dead ends: 58 [2023-11-29 00:22:26,999 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 00:22:27,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:22:27,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:27,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 86 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:22:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 00:22:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 00:22:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 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 00:22:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-29 00:22:27,003 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2023-11-29 00:22:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:27,003 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-29 00:22:27,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-29 00:22:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 00:22:27,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:27,004 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:27,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:22:27,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:27,207 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -525266126, now seen corresponding path program 1 times [2023-11-29 00:22:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433645118] [2023-11-29 00:22:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433645118] [2023-11-29 00:22:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433645118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:27,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068650926] [2023-11-29 00:22:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:27,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:27,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:27,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:22:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:27,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:22:27,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:27,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:27,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:27,635 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 13 treesize of output 11 [2023-11-29 00:22:27,637 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 14 treesize of output 12 [2023-11-29 00:22:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:27,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068650926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:27,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:27,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-29 00:22:27,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534326392] [2023-11-29 00:22:27,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:27,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:22:27,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:22:27,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:22:27,690 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 00:22:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:27,861 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-11-29 00:22:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:22:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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) Word has length 22 [2023-11-29 00:22:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:27,862 INFO L225 Difference]: With dead ends: 55 [2023-11-29 00:22:27,863 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 00:22:27,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:22:27,864 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:27,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 00:22:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-29 00:22:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 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 00:22:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-29 00:22:27,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2023-11-29 00:22:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:27,866 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-29 00:22:27,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 00:22:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-29 00:22:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 00:22:27,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:27,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:27,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:22:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:28,068 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -632690582, now seen corresponding path program 2 times [2023-11-29 00:22:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124224695] [2023-11-29 00:22:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124224695] [2023-11-29 00:22:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124224695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245559705] [2023-11-29 00:22:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:22:28,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:28,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:28,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:28,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:22:28,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:22:28,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:28,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:22:28,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:28,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:28,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:22:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245559705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:28,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:28,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 00:22:28,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983550570] [2023-11-29 00:22:28,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:22:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:22:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:22:28,696 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:28,942 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2023-11-29 00:22:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:22:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 00:22:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:28,944 INFO L225 Difference]: With dead ends: 52 [2023-11-29 00:22:28,944 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 00:22:28,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:22:28,945 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:28,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 137 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 00:22:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2023-11-29 00:22:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-11-29 00:22:28,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 24 [2023-11-29 00:22:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-11-29 00:22:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-11-29 00:22:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 00:22:28,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:28,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:28,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:22:29,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:22:29,151 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:29,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1861514356, now seen corresponding path program 1 times [2023-11-29 00:22:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702337411] [2023-11-29 00:22:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702337411] [2023-11-29 00:22:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702337411] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304611825] [2023-11-29 00:22:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:29,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:22:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:29,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:22:29,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:29,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:22:29,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304611825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:29,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:29,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 12 [2023-11-29 00:22:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585736231] [2023-11-29 00:22:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:22:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:22:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:22:29,556 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 00:22:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:29,668 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-29 00:22:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:22:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 25 [2023-11-29 00:22:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:29,669 INFO L225 Difference]: With dead ends: 66 [2023-11-29 00:22:29,669 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 00:22:29,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:22:29,670 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:29,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 84 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 00:22:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-11-29 00:22:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-11-29 00:22:29,673 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2023-11-29 00:22:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:29,673 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-11-29 00:22:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 00:22:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-11-29 00:22:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 00:22:29,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:29,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:29,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:29,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:22:29,879 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:29,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 56076022, now seen corresponding path program 1 times [2023-11-29 00:22:29,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:29,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351479186] [2023-11-29 00:22:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:30,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351479186] [2023-11-29 00:22:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351479186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363490148] [2023-11-29 00:22:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:30,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:30,145 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:30,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:22:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:30,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:22:30,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:30,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:30,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:30,334 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 13 treesize of output 11 [2023-11-29 00:22:30,336 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 14 treesize of output 12 [2023-11-29 00:22:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363490148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:30,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 16 [2023-11-29 00:22:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877317171] [2023-11-29 00:22:30,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:30,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:22:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:22:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:22:30,394 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:30,631 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2023-11-29 00:22:30,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:22:30,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 00:22:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:30,633 INFO L225 Difference]: With dead ends: 86 [2023-11-29 00:22:30,633 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 00:22:30,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:22:30,634 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:30,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 127 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 00:22:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2023-11-29 00:22:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 00:22:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2023-11-29 00:22:30,637 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2023-11-29 00:22:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:30,637 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2023-11-29 00:22:30,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2023-11-29 00:22:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:22:30,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:30,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:30,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:22:30,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:30,839 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:30,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash -33097359, now seen corresponding path program 2 times [2023-11-29 00:22:30,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:30,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452491559] [2023-11-29 00:22:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:30,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452491559] [2023-11-29 00:22:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452491559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:31,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651946272] [2023-11-29 00:22:31,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:22:31,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:31,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:31,093 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:31,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:22:31,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:22:31,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:31,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:22:31,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:31,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:31,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:22:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:31,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651946272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:31,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:31,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-29 00:22:31,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130657614] [2023-11-29 00:22:31,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:31,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 00:22:31,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 00:22:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:22:31,534 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:31,880 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-11-29 00:22:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:22:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 00:22:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:31,881 INFO L225 Difference]: With dead ends: 85 [2023-11-29 00:22:31,882 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 00:22:31,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:22:31,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:31,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 158 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 00:22:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2023-11-29 00:22:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2023-11-29 00:22:31,886 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 27 [2023-11-29 00:22:31,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:31,886 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2023-11-29 00:22:31,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2023-11-29 00:22:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:22:31,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:31,887 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:31,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:22:32,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:32,088 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:32,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash -852696889, now seen corresponding path program 3 times [2023-11-29 00:22:32,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:32,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766733471] [2023-11-29 00:22:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:32,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766733471] [2023-11-29 00:22:32,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766733471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:32,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980909499] [2023-11-29 00:22:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:22:32,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:32,403 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:32,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:22:32,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:22:32,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:32,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:22:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:32,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:32,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:33,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:33,022 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 00:22:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:33,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980909499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:33,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:33,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2023-11-29 00:22:33,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983127446] [2023-11-29 00:22:33,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 00:22:33,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 00:22:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:22:33,285 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:33,663 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2023-11-29 00:22:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:22:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 00:22:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:33,664 INFO L225 Difference]: With dead ends: 123 [2023-11-29 00:22:33,664 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 00:22:33,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1550, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:22:33,666 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:33,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 227 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 00:22:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2023-11-29 00:22:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 00:22:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2023-11-29 00:22:33,669 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 30 [2023-11-29 00:22:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:33,669 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2023-11-29 00:22:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2023-11-29 00:22:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 00:22:33,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:33,671 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:33,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:22:33,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:22:33,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:33,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:33,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1204644341, now seen corresponding path program 3 times [2023-11-29 00:22:33,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:33,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873476169] [2023-11-29 00:22:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:33,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:34,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873476169] [2023-11-29 00:22:34,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873476169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:34,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419473278] [2023-11-29 00:22:34,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:22:34,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:34,300 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:34,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:22:34,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:22:34,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:34,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 00:22:34,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:34,536 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 00:22:34,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:34,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:34,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:35,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:35,039 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 00:22:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419473278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:35,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:35,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2023-11-29 00:22:35,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731968201] [2023-11-29 00:22:35,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:35,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:22:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:22:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:22:35,483 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:36,186 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2023-11-29 00:22:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:22:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 00:22:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:36,187 INFO L225 Difference]: With dead ends: 152 [2023-11-29 00:22:36,187 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 00:22:36,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=500, Invalid=2050, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:22:36,189 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:36,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 240 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 00:22:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2023-11-29 00:22:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.15625) internal successors, (148), 129 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 00:22:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2023-11-29 00:22:36,192 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 31 [2023-11-29 00:22:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:36,192 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2023-11-29 00:22:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2023-11-29 00:22:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 00:22:36,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:36,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:36,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:22:36,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:22:36,393 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:36,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:36,394 INFO L85 PathProgramCache]: Analyzing trace with hash 236518911, now seen corresponding path program 4 times [2023-11-29 00:22:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:36,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404311202] [2023-11-29 00:22:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:22:36,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404311202] [2023-11-29 00:22:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404311202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779697660] [2023-11-29 00:22:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:22:36,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:36,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:36,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:22:36,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:22:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:36,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:22:36,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:36,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:22:37,319 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2023-11-29 00:22:37,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2023-11-29 00:22:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:22:37,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:37,860 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 29 treesize of output 25 [2023-11-29 00:22:37,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-11-29 00:22:38,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:22:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:22:38,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779697660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:38,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:38,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2023-11-29 00:22:38,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515419278] [2023-11-29 00:22:38,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:38,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:22:38,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:22:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:22:38,128 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:42,274 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2023-11-29 00:22:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:22:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 00:22:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:42,275 INFO L225 Difference]: With dead ends: 136 [2023-11-29 00:22:42,275 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 00:22:42,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=478, Invalid=2384, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 00:22:42,276 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:42,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 185 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 00:22:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2023-11-29 00:22:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-11-29 00:22:42,280 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 32 [2023-11-29 00:22:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:42,280 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-11-29 00:22:42,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-11-29 00:22:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:22:42,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:42,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:42,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:22:42,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:22:42,481 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:42,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1825944624, now seen corresponding path program 4 times [2023-11-29 00:22:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:42,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36907531] [2023-11-29 00:22:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36907531] [2023-11-29 00:22:42,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36907531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:42,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458748477] [2023-11-29 00:22:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:22:42,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:42,767 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:42,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:22:42,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:22:42,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:42,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:22:42,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:42,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:43,197 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 7 treesize of output 5 [2023-11-29 00:22:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458748477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:43,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:43,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2023-11-29 00:22:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527967167] [2023-11-29 00:22:43,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:43,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:22:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:22:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:22:43,231 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:43,592 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-11-29 00:22:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:22:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 00:22:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:43,593 INFO L225 Difference]: With dead ends: 78 [2023-11-29 00:22:43,593 INFO L226 Difference]: Without dead ends: 78 [2023-11-29 00:22:43,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:22:43,594 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:43,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 189 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:22:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-29 00:22:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2023-11-29 00:22:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 00:22:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-11-29 00:22:43,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 33 [2023-11-29 00:22:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:43,597 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-11-29 00:22:43,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-11-29 00:22:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 00:22:43,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:43,598 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:43,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:22:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:22:43,799 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:43,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash -416109260, now seen corresponding path program 5 times [2023-11-29 00:22:43,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276534839] [2023-11-29 00:22:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:22:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276534839] [2023-11-29 00:22:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276534839] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128591130] [2023-11-29 00:22:44,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:22:44,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:44,752 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:44,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:22:44,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 00:22:44,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:44,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 00:22:44,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:44,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:45,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:45,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:45,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:22:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:45,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128591130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:45,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:45,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 31 [2023-11-29 00:22:45,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695087648] [2023-11-29 00:22:45,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:45,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 00:22:45,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:45,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 00:22:45,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:22:45,143 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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 00:22:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:46,154 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2023-11-29 00:22:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 00:22:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) Word has length 37 [2023-11-29 00:22:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:46,155 INFO L225 Difference]: With dead ends: 126 [2023-11-29 00:22:46,155 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 00:22:46,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=417, Invalid=3365, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 00:22:46,158 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 200 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:46,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 266 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 00:22:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2023-11-29 00:22:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 00:22:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2023-11-29 00:22:46,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 37 [2023-11-29 00:22:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:46,161 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2023-11-29 00:22:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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 00:22:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2023-11-29 00:22:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 00:22:46,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:46,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:46,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:22:46,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:46,362 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:46,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash -462741713, now seen corresponding path program 6 times [2023-11-29 00:22:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344002453] [2023-11-29 00:22:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:46,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:46,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344002453] [2023-11-29 00:22:46,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344002453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:46,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838760954] [2023-11-29 00:22:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:22:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:46,745 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:46,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:22:47,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 00:22:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:47,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:22:47,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:47,132 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 00:22:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:47,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838760954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:47,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2023-11-29 00:22:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859669845] [2023-11-29 00:22:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:22:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:22:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:22:47,694 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:48,074 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2023-11-29 00:22:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:22:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 00:22:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:48,076 INFO L225 Difference]: With dead ends: 93 [2023-11-29 00:22:48,076 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 00:22:48,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 00:22:48,078 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 227 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:48,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 221 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:22:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 00:22:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2023-11-29 00:22:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-11-29 00:22:48,082 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 39 [2023-11-29 00:22:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:48,082 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-11-29 00:22:48,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-11-29 00:22:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:22:48,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:48,083 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:48,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 00:22:48,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 00:22:48,284 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:48,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1879867571, now seen corresponding path program 7 times [2023-11-29 00:22:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:48,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055479904] [2023-11-29 00:22:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:48,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055479904] [2023-11-29 00:22:48,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055479904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:48,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383349488] [2023-11-29 00:22:48,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:22:48,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:48,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:48,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:48,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:22:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:48,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 00:22:48,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:49,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:49,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:49,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:49,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:22:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383349488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:49,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 29 [2023-11-29 00:22:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700427167] [2023-11-29 00:22:49,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 00:22:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 00:22:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:22:49,261 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:49,969 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2023-11-29 00:22:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:22:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 00:22:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:49,970 INFO L225 Difference]: With dead ends: 147 [2023-11-29 00:22:49,970 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 00:22:49,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=2192, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:22:49,972 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:49,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 347 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 00:22:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2023-11-29 00:22:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2023-11-29 00:22:49,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 43 [2023-11-29 00:22:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:49,975 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2023-11-29 00:22:49,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2023-11-29 00:22:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 00:22:49,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:49,976 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:49,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:22:50,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:22:50,177 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:50,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 556288622, now seen corresponding path program 8 times [2023-11-29 00:22:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:50,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648421869] [2023-11-29 00:22:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:50,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648421869] [2023-11-29 00:22:50,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648421869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:50,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309230341] [2023-11-29 00:22:50,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:22:50,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:50,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:50,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:22:50,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:22:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:50,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 00:22:50,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:51,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:51,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:22:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:51,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309230341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:51,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:51,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2023-11-29 00:22:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904701965] [2023-11-29 00:22:51,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:51,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 00:22:51,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 00:22:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:22:51,467 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:52,267 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2023-11-29 00:22:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:22:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-29 00:22:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:52,268 INFO L225 Difference]: With dead ends: 108 [2023-11-29 00:22:52,268 INFO L226 Difference]: Without dead ends: 108 [2023-11-29 00:22:52,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 00:22:52,270 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:52,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 299 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:22:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-29 00:22:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2023-11-29 00:22:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 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 00:22:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-11-29 00:22:52,273 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 45 [2023-11-29 00:22:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:52,273 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-11-29 00:22:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-11-29 00:22:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 00:22:52,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:52,274 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:52,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:22:52,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:52,474 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:52,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1739846770, now seen corresponding path program 9 times [2023-11-29 00:22:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:52,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475522292] [2023-11-29 00:22:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:53,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475522292] [2023-11-29 00:22:53,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475522292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004256422] [2023-11-29 00:22:53,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:22:53,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:53,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:53,073 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:53,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:22:53,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:22:53,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:53,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 00:22:53,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:53,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:22:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:53,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:53,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:53,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:22:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:53,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004256422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:53,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:53,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 38 [2023-11-29 00:22:53,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748707640] [2023-11-29 00:22:53,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:53,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:22:53,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:53,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:22:53,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:22:53,771 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:54,562 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2023-11-29 00:22:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 00:22:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 00:22:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:54,563 INFO L225 Difference]: With dead ends: 170 [2023-11-29 00:22:54,563 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 00:22:54,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:22:54,564 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 120 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:54,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 567 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 00:22:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2023-11-29 00:22:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2023-11-29 00:22:54,567 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 49 [2023-11-29 00:22:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:54,567 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2023-11-29 00:22:54,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2023-11-29 00:22:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 00:22:54,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:54,568 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:54,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:22:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 00:22:54,768 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:54,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 21120493, now seen corresponding path program 10 times [2023-11-29 00:22:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172244699] [2023-11-29 00:22:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:55,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:55,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172244699] [2023-11-29 00:22:55,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172244699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:55,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544865870] [2023-11-29 00:22:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:22:55,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:55,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:55,322 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:55,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:22:55,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:22:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:55,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 00:22:55,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:55,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:56,018 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 7 treesize of output 5 [2023-11-29 00:22:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:56,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544865870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:56,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:56,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2023-11-29 00:22:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849651689] [2023-11-29 00:22:56,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 00:22:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 00:22:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:22:56,123 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:56,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:56,995 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2023-11-29 00:22:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:22:56,996 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-29 00:22:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:56,997 INFO L225 Difference]: With dead ends: 123 [2023-11-29 00:22:56,997 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 00:22:56,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=2465, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 00:22:56,999 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 260 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:56,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 457 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 00:22:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2023-11-29 00:22:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 00:22:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2023-11-29 00:22:57,003 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 51 [2023-11-29 00:22:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:57,003 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2023-11-29 00:22:57,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:22:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2023-11-29 00:22:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 00:22:57,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:57,004 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:57,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:22:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:57,204 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:57,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1800804465, now seen corresponding path program 11 times [2023-11-29 00:22:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:57,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569983147] [2023-11-29 00:22:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:57,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569983147] [2023-11-29 00:22:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569983147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:57,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743364913] [2023-11-29 00:22:57,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:22:57,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:57,788 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:57,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:22:57,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 00:22:57,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:22:57,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 00:22:57,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:58,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:22:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:58,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:58,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:22:58,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:22:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:58,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743364913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:58,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:22:58,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 35 [2023-11-29 00:22:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072173614] [2023-11-29 00:22:58,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:58,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:22:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:22:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:22:58,278 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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 00:22:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:59,222 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2023-11-29 00:22:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 00:22:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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) Word has length 55 [2023-11-29 00:22:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:59,223 INFO L225 Difference]: With dead ends: 193 [2023-11-29 00:22:59,223 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 00:22:59,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=448, Invalid=3458, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 00:22:59,224 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 168 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:59,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 638 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:22:59,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 00:22:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2023-11-29 00:22:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 107 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 00:22:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2023-11-29 00:22:59,228 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 55 [2023-11-29 00:22:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:59,228 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2023-11-29 00:22:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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 00:22:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2023-11-29 00:22:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 00:22:59,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:59,229 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:59,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:22:59,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 00:22:59,429 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:22:59,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1707221420, now seen corresponding path program 12 times [2023-11-29 00:22:59,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:59,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516732584] [2023-11-29 00:22:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:59,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:22:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516732584] [2023-11-29 00:22:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516732584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428823306] [2023-11-29 00:22:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:22:59,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:59,952 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:59,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:23:00,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 00:23:00,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:00,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 00:23:00,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:00,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:01,021 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 7 treesize of output 5 [2023-11-29 00:23:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:01,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428823306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:01,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:01,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2023-11-29 00:23:01,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433911748] [2023-11-29 00:23:01,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:01,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:23:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:23:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:23:01,126 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:01,854 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2023-11-29 00:23:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:23:01,855 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-29 00:23:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:01,855 INFO L225 Difference]: With dead ends: 138 [2023-11-29 00:23:01,855 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 00:23:01,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=645, Invalid=3777, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:23:01,857 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:01,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 385 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:23:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 00:23:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2023-11-29 00:23:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 00:23:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-11-29 00:23:01,861 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 57 [2023-11-29 00:23:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:01,861 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-11-29 00:23:01,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-11-29 00:23:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 00:23:01,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:01,862 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:01,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 00:23:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 00:23:02,063 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:02,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1863058256, now seen corresponding path program 13 times [2023-11-29 00:23:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:02,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360164896] [2023-11-29 00:23:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:02,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360164896] [2023-11-29 00:23:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360164896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:02,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474356051] [2023-11-29 00:23:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:23:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:02,703 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:02,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:23:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:02,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 00:23:02,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:03,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:23:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:03,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:03,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:03,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474356051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 38 [2023-11-29 00:23:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259537102] [2023-11-29 00:23:03,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:23:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:23:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:23:03,205 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:04,291 INFO L93 Difference]: Finished difference Result 216 states and 235 transitions. [2023-11-29 00:23:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 00:23:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 00:23:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:04,292 INFO L225 Difference]: With dead ends: 216 [2023-11-29 00:23:04,292 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 00:23:04,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=493, Invalid=4199, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 00:23:04,294 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 236 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:04,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 739 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:23:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 00:23:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2023-11-29 00:23:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 119 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2023-11-29 00:23:04,297 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 61 [2023-11-29 00:23:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:04,297 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2023-11-29 00:23:04,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2023-11-29 00:23:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 00:23:04,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:04,298 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:04,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:23:04,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:23:04,499 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:04,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1401220523, now seen corresponding path program 14 times [2023-11-29 00:23:04,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:04,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170304110] [2023-11-29 00:23:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:04,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170304110] [2023-11-29 00:23:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170304110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530988445] [2023-11-29 00:23:05,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:23:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:05,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:05,197 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:05,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:23:05,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:23:05,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:05,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 00:23:05,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:05,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:06,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:23:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530988445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:06,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 45 [2023-11-29 00:23:06,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881073328] [2023-11-29 00:23:06,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 00:23:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 00:23:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 00:23:06,214 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:07,459 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2023-11-29 00:23:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:23:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-29 00:23:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:07,460 INFO L225 Difference]: With dead ends: 153 [2023-11-29 00:23:07,460 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 00:23:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:23:07,461 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 303 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:07,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 542 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:23:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 00:23:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2023-11-29 00:23:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.110236220472441) internal successors, (141), 127 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2023-11-29 00:23:07,465 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 63 [2023-11-29 00:23:07,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:07,466 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2023-11-29 00:23:07,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2023-11-29 00:23:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 00:23:07,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:07,467 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:07,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:23:07,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:23:07,667 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:07,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 140685615, now seen corresponding path program 15 times [2023-11-29 00:23:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:07,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93174240] [2023-11-29 00:23:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:07,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93174240] [2023-11-29 00:23:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93174240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749054302] [2023-11-29 00:23:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:23:08,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:08,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:08,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:08,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:23:08,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 00:23:08,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:08,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-29 00:23:08,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:08,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:23:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:08,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:09,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:09,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:09,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749054302] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:09,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:09,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 50 [2023-11-29 00:23:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141228476] [2023-11-29 00:23:09,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:09,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 00:23:09,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 00:23:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2296, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:23:09,367 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:10,795 INFO L93 Difference]: Finished difference Result 239 states and 260 transitions. [2023-11-29 00:23:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:23:10,796 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-29 00:23:10,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:10,797 INFO L225 Difference]: With dead ends: 239 [2023-11-29 00:23:10,797 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 00:23:10,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=567, Invalid=5913, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 00:23:10,799 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 307 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:10,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1194 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:23:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 00:23:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2023-11-29 00:23:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2023-11-29 00:23:10,803 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 67 [2023-11-29 00:23:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:10,803 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2023-11-29 00:23:10,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2023-11-29 00:23:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 00:23:10,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:10,804 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:10,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 00:23:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 00:23:11,005 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:11,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1413200362, now seen corresponding path program 16 times [2023-11-29 00:23:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:11,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929837143] [2023-11-29 00:23:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 56 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:11,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929837143] [2023-11-29 00:23:11,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929837143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801429776] [2023-11-29 00:23:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:23:11,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:11,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:11,660 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:11,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:23:11,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:23:11,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:11,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 00:23:11,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:12,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:12,569 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 7 treesize of output 5 [2023-11-29 00:23:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801429776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:12,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:12,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2023-11-29 00:23:12,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999562014] [2023-11-29 00:23:12,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:12,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:23:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:12,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:23:12,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:23:12,765 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:13,870 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2023-11-29 00:23:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:23:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-29 00:23:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:13,871 INFO L225 Difference]: With dead ends: 168 [2023-11-29 00:23:13,871 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 00:23:13,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=640, Invalid=4472, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 00:23:13,872 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 323 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:13,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 691 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:23:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 00:23:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2023-11-29 00:23:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1079136690647482) internal successors, (154), 139 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 00:23:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-11-29 00:23:13,875 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 69 [2023-11-29 00:23:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-11-29 00:23:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-11-29 00:23:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 00:23:13,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:13,876 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:13,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 00:23:14,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:14,076 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:14,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash -62175762, now seen corresponding path program 17 times [2023-11-29 00:23:14,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:14,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614772750] [2023-11-29 00:23:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:14,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:14,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614772750] [2023-11-29 00:23:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614772750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554368002] [2023-11-29 00:23:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:23:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:14,850 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:14,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 00:23:15,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 00:23:15,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:15,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 00:23:15,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:15,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:23:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:15,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:15,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:15,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:15,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554368002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:15,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 44 [2023-11-29 00:23:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161597784] [2023-11-29 00:23:15,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 00:23:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 00:23:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:23:15,595 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:17,275 INFO L93 Difference]: Finished difference Result 262 states and 285 transitions. [2023-11-29 00:23:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 00:23:17,276 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-29 00:23:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:17,277 INFO L225 Difference]: With dead ends: 262 [2023-11-29 00:23:17,277 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 00:23:17,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=583, Invalid=5897, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 00:23:17,278 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:17,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1153 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:23:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 00:23:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2023-11-29 00:23:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2023-11-29 00:23:17,283 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 73 [2023-11-29 00:23:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2023-11-29 00:23:17,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2023-11-29 00:23:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 00:23:17,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:17,284 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:17,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 00:23:17,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:17,484 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:17,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 392926825, now seen corresponding path program 18 times [2023-11-29 00:23:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487143044] [2023-11-29 00:23:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:17,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 72 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:18,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:18,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487143044] [2023-11-29 00:23:18,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487143044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:18,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907336769] [2023-11-29 00:23:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:23:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:18,318 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 00:23:18,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 00:23:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:18,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 00:23:18,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 81 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:19,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:19,939 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 7 treesize of output 5 [2023-11-29 00:23:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 81 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907336769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:20,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:20,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2023-11-29 00:23:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829804075] [2023-11-29 00:23:20,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:20,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 00:23:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 00:23:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=3494, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 00:23:20,154 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:21,482 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2023-11-29 00:23:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:23:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-29 00:23:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:21,483 INFO L225 Difference]: With dead ends: 183 [2023-11-29 00:23:21,483 INFO L226 Difference]: Without dead ends: 183 [2023-11-29 00:23:21,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1098, Invalid=6734, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 00:23:21,484 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 329 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:21,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 842 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:23:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-29 00:23:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 152. [2023-11-29 00:23:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1059602649006623) internal successors, (167), 151 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 00:23:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2023-11-29 00:23:21,487 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 75 [2023-11-29 00:23:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:21,488 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2023-11-29 00:23:21,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2023-11-29 00:23:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 00:23:21,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:21,489 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:21,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 00:23:21,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:21,689 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:21,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1289041171, now seen corresponding path program 19 times [2023-11-29 00:23:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:21,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425940593] [2023-11-29 00:23:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:22,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:22,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425940593] [2023-11-29 00:23:22,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425940593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:22,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593576513] [2023-11-29 00:23:22,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:23:22,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:22,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:22,639 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:22,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 00:23:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:22,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-29 00:23:22,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:23,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:23:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:23,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:23,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:23,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:23,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593576513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:23,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:23,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 47 [2023-11-29 00:23:23,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343567749] [2023-11-29 00:23:23,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:23,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 00:23:23,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 00:23:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 00:23:23,373 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:25,309 INFO L93 Difference]: Finished difference Result 285 states and 310 transitions. [2023-11-29 00:23:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:23:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-29 00:23:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:25,310 INFO L225 Difference]: With dead ends: 285 [2023-11-29 00:23:25,310 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 00:23:25,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=628, Invalid=6854, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 00:23:25,312 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 256 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:25,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1308 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:23:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 00:23:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2023-11-29 00:23:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.103225806451613) internal successors, (171), 155 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 00:23:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2023-11-29 00:23:25,317 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 79 [2023-11-29 00:23:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:25,317 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2023-11-29 00:23:25,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2023-11-29 00:23:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 00:23:25,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:25,318 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:25,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 00:23:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 00:23:25,524 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:25,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1399690024, now seen corresponding path program 20 times [2023-11-29 00:23:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258172970] [2023-11-29 00:23:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 90 proven. 231 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258172970] [2023-11-29 00:23:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258172970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:26,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827702972] [2023-11-29 00:23:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:23:26,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:26,587 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:26,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 00:23:26,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:23:26,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:26,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 109 conjunts are in the unsatisfiable core [2023-11-29 00:23:26,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 100 proven. 221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:27,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:27,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:23:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 100 proven. 221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827702972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:28,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:28,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 57 [2023-11-29 00:23:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765135795] [2023-11-29 00:23:28,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 00:23:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 00:23:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2927, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 00:23:28,110 INFO L87 Difference]: Start difference. First operand 156 states and 171 transitions. Second operand has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:30,174 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2023-11-29 00:23:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:23:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-11-29 00:23:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:30,176 INFO L225 Difference]: With dead ends: 198 [2023-11-29 00:23:30,176 INFO L226 Difference]: Without dead ends: 198 [2023-11-29 00:23:30,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2459 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=858, Invalid=6282, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:23:30,177 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 291 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:30,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1128 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:23:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-29 00:23:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2023-11-29 00:23:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1042944785276074) internal successors, (180), 163 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 00:23:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2023-11-29 00:23:30,182 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 81 [2023-11-29 00:23:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:30,182 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2023-11-29 00:23:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2023-11-29 00:23:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-29 00:23:30,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:30,184 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:30,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 00:23:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 00:23:30,384 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:30,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -263040980, now seen corresponding path program 21 times [2023-11-29 00:23:30,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646598966] [2023-11-29 00:23:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:31,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:31,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646598966] [2023-11-29 00:23:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646598966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:31,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342756555] [2023-11-29 00:23:31,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:23:31,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:31,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:31,515 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 00:23:31,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-29 00:23:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:31,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-29 00:23:31,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:32,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:23:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:32,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:32,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:32,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342756555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:32,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:32,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 62 [2023-11-29 00:23:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902445833] [2023-11-29 00:23:32,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 00:23:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 00:23:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3595, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 00:23:32,999 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:35,298 INFO L93 Difference]: Finished difference Result 308 states and 335 transitions. [2023-11-29 00:23:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 00:23:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-29 00:23:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:35,300 INFO L225 Difference]: With dead ends: 308 [2023-11-29 00:23:35,300 INFO L226 Difference]: Without dead ends: 175 [2023-11-29 00:23:35,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=717, Invalid=9585, Unknown=0, NotChecked=0, Total=10302 [2023-11-29 00:23:35,301 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 237 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:35,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 1725 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:23:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-29 00:23:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2023-11-29 00:23:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 167 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 00:23:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2023-11-29 00:23:35,306 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 85 [2023-11-29 00:23:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:35,306 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2023-11-29 00:23:35,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2023-11-29 00:23:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 00:23:35,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:35,307 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:35,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 00:23:35,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 00:23:35,508 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:35,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash -428949465, now seen corresponding path program 22 times [2023-11-29 00:23:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:35,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417933715] [2023-11-29 00:23:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:35,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 110 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:36,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:36,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417933715] [2023-11-29 00:23:36,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417933715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:36,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656961072] [2023-11-29 00:23:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:23:36,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:36,406 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:36,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 00:23:36,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:23:36,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:36,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-29 00:23:36,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 132 proven. 254 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:37,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:37,745 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 7 treesize of output 5 [2023-11-29 00:23:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 132 proven. 254 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656961072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:38,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:38,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2023-11-29 00:23:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884304398] [2023-11-29 00:23:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:38,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 00:23:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 00:23:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3466, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 00:23:38,009 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:39,540 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2023-11-29 00:23:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 00:23:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-11-29 00:23:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:39,542 INFO L225 Difference]: With dead ends: 213 [2023-11-29 00:23:39,542 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 00:23:39,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 129 SyntacticMatches, 12 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=938, Invalid=7072, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 00:23:39,543 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 451 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:39,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1117 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:23:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 00:23:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 176. [2023-11-29 00:23:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1028571428571428) internal successors, (193), 175 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 193 transitions. [2023-11-29 00:23:39,548 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 193 transitions. Word has length 87 [2023-11-29 00:23:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:39,548 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 193 transitions. [2023-11-29 00:23:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 193 transitions. [2023-11-29 00:23:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 00:23:39,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:39,549 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:39,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 00:23:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:39,750 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1796807253, now seen corresponding path program 23 times [2023-11-29 00:23:39,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:39,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694640945] [2023-11-29 00:23:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:40,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694640945] [2023-11-29 00:23:40,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694640945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795157773] [2023-11-29 00:23:40,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:23:40,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:40,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:40,814 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:40,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 00:23:41,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 00:23:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:41,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 140 conjunts are in the unsatisfiable core [2023-11-29 00:23:41,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:41,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:23:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:41,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:41,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:41,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795157773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:41,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:41,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 53 [2023-11-29 00:23:41,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198483387] [2023-11-29 00:23:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:23:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:23:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:23:41,704 INFO L87 Difference]: Start difference. First operand 176 states and 193 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 00:23:44,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:44,131 INFO L93 Difference]: Finished difference Result 331 states and 360 transitions. [2023-11-29 00:23:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 00:23:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-11-29 00:23:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:44,132 INFO L225 Difference]: With dead ends: 331 [2023-11-29 00:23:44,132 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 00:23:44,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=718, Invalid=8984, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 00:23:44,133 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 182 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 3311 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:44,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2005 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3311 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:23:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 00:23:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2023-11-29 00:23:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.100558659217877) internal successors, (197), 179 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 00:23:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 197 transitions. [2023-11-29 00:23:44,137 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 197 transitions. Word has length 91 [2023-11-29 00:23:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:44,137 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 197 transitions. [2023-11-29 00:23:44,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 00:23:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 197 transitions. [2023-11-29 00:23:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 00:23:44,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:44,138 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:44,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 00:23:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 00:23:44,339 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:44,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 930098534, now seen corresponding path program 24 times [2023-11-29 00:23:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:44,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910505491] [2023-11-29 00:23:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 132 proven. 325 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:45,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910505491] [2023-11-29 00:23:45,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910505491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701531066] [2023-11-29 00:23:45,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:23:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:45,419 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:45,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 00:23:46,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-29 00:23:46,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:46,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-29 00:23:46,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 144 proven. 313 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:46,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:47,885 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 7 treesize of output 5 [2023-11-29 00:23:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 144 proven. 313 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:48,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701531066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:48,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:48,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 78 [2023-11-29 00:23:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343826761] [2023-11-29 00:23:48,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:48,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 00:23:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 00:23:48,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=5318, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 00:23:48,205 INFO L87 Difference]: Start difference. First operand 180 states and 197 transitions. Second operand has 79 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 79 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 00:23:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:50,051 INFO L93 Difference]: Finished difference Result 228 states and 247 transitions. [2023-11-29 00:23:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:23:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 79 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 93 [2023-11-29 00:23:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:50,053 INFO L225 Difference]: With dead ends: 228 [2023-11-29 00:23:50,053 INFO L226 Difference]: Without dead ends: 228 [2023-11-29 00:23:50,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 125 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4406 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1641, Invalid=10349, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 00:23:50,054 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 412 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 982 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:23:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-29 00:23:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 188. [2023-11-29 00:23:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1016042780748663) internal successors, (206), 187 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 00:23:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 206 transitions. [2023-11-29 00:23:50,057 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 206 transitions. Word has length 93 [2023-11-29 00:23:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 206 transitions. [2023-11-29 00:23:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 79 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 00:23:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 206 transitions. [2023-11-29 00:23:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 00:23:50,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:50,059 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:50,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 00:23:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 00:23:50,259 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2132698262, now seen corresponding path program 25 times [2023-11-29 00:23:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595792672] [2023-11-29 00:23:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:51,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595792672] [2023-11-29 00:23:51,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595792672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386128884] [2023-11-29 00:23:51,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:23:51,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:51,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:51,453 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:51,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 00:23:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:51,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 00:23:51,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:52,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:23:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:52,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:52,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:23:52,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:23:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386128884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:52,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 56 [2023-11-29 00:23:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932905321] [2023-11-29 00:23:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 00:23:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 00:23:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2922, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:23:52,287 INFO L87 Difference]: Start difference. First operand 188 states and 206 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 00:23:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:55,126 INFO L93 Difference]: Finished difference Result 354 states and 385 transitions. [2023-11-29 00:23:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 00:23:55,127 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-11-29 00:23:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:55,128 INFO L225 Difference]: With dead ends: 354 [2023-11-29 00:23:55,128 INFO L226 Difference]: Without dead ends: 199 [2023-11-29 00:23:55,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=763, Invalid=10157, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 00:23:55,129 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 327 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 3546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:55,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2156 Invalid, 3546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:23:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-11-29 00:23:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 192. [2023-11-29 00:23:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0994764397905759) internal successors, (210), 191 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:23:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2023-11-29 00:23:55,132 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 97 [2023-11-29 00:23:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:55,133 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2023-11-29 00:23:55,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 00:23:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2023-11-29 00:23:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 00:23:55,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:55,133 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:55,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 00:23:55,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 00:23:55,334 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:23:55,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -683218203, now seen corresponding path program 26 times [2023-11-29 00:23:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953687194] [2023-11-29 00:23:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:55,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 156 proven. 378 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:56,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:56,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953687194] [2023-11-29 00:23:56,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953687194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:56,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946167602] [2023-11-29 00:23:56,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:23:56,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:56,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:56,681 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:56,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 00:23:56,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:23:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:23:56,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-29 00:23:56,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 169 proven. 365 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:57,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:58,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:23:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 169 proven. 365 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:23:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946167602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:58,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:23:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 69 [2023-11-29 00:23:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649725769] [2023-11-29 00:23:58,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 00:23:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 00:23:58,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=4274, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 00:23:58,519 INFO L87 Difference]: Start difference. First operand 192 states and 210 transitions. Second operand has 70 states, 69 states have (on average 2.8550724637681157) internal successors, (197), 70 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 00:24:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:00,558 INFO L93 Difference]: Finished difference Result 243 states and 263 transitions. [2023-11-29 00:24:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:24:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.8550724637681157) internal successors, (197), 70 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-29 00:24:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:00,559 INFO L225 Difference]: With dead ends: 243 [2023-11-29 00:24:00,559 INFO L226 Difference]: Without dead ends: 243 [2023-11-29 00:24:00,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 147 SyntacticMatches, 15 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1197, Invalid=9309, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 00:24:00,560 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 504 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:00,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1574 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2599 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:24:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-29 00:24:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 200. [2023-11-29 00:24:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.100502512562814) internal successors, (219), 199 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 00:24:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 219 transitions. [2023-11-29 00:24:00,564 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 219 transitions. Word has length 99 [2023-11-29 00:24:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:00,564 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 219 transitions. [2023-11-29 00:24:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.8550724637681157) internal successors, (197), 70 states have internal predecessors, (197), 0 states have call successors, (0), 0 states 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 00:24:00,564 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 219 transitions. [2023-11-29 00:24:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 00:24:00,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:00,565 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:00,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 00:24:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:00,766 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:00,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:00,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1274052247, now seen corresponding path program 27 times [2023-11-29 00:24:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311553883] [2023-11-29 00:24:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 41 proven. 547 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311553883] [2023-11-29 00:24:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311553883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:02,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024747780] [2023-11-29 00:24:02,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:24:02,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:02,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:02,129 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:02,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 00:24:02,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 00:24:02,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:02,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-29 00:24:02,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:03,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:24:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 41 proven. 547 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:03,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:03,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:24:03,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:24:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 41 proven. 547 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:03,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024747780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:03,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:03,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 59 [2023-11-29 00:24:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122586372] [2023-11-29 00:24:03,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:03,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 00:24:03,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:03,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 00:24:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3256, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 00:24:03,758 INFO L87 Difference]: Start difference. First operand 200 states and 219 transitions. Second operand has 59 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 00:24:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:06,770 INFO L93 Difference]: Finished difference Result 377 states and 410 transitions. [2023-11-29 00:24:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 00:24:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-29 00:24:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:06,771 INFO L225 Difference]: With dead ends: 377 [2023-11-29 00:24:06,771 INFO L226 Difference]: Without dead ends: 211 [2023-11-29 00:24:06,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=808, Invalid=11402, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 00:24:06,773 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 422 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:06,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2294 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:24:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-29 00:24:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2023-11-29 00:24:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 203 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 223 transitions. [2023-11-29 00:24:06,777 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 223 transitions. Word has length 103 [2023-11-29 00:24:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:06,777 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 223 transitions. [2023-11-29 00:24:06,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 00:24:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 223 transitions. [2023-11-29 00:24:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 00:24:06,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:06,779 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:06,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 00:24:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 00:24:06,979 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:06,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1637615780, now seen corresponding path program 28 times [2023-11-29 00:24:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832021442] [2023-11-29 00:24:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 182 proven. 435 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832021442] [2023-11-29 00:24:08,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832021442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:08,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115965742] [2023-11-29 00:24:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:24:08,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:08,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:08,207 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 00:24:08,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:24:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:08,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 00:24:08,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 210 proven. 407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:09,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:09,909 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 7 treesize of output 5 [2023-11-29 00:24:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 210 proven. 407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:10,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115965742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:10,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:10,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 74 [2023-11-29 00:24:10,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679060021] [2023-11-29 00:24:10,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 00:24:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 00:24:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=4922, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 00:24:10,261 INFO L87 Difference]: Start difference. First operand 204 states and 223 transitions. Second operand has 75 states, 74 states have (on average 2.8783783783783785) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:12,278 INFO L93 Difference]: Finished difference Result 258 states and 279 transitions. [2023-11-29 00:24:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:24:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.8783783783783785) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2023-11-29 00:24:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:12,279 INFO L225 Difference]: With dead ends: 258 [2023-11-29 00:24:12,279 INFO L226 Difference]: Without dead ends: 258 [2023-11-29 00:24:12,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 156 SyntacticMatches, 15 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1288, Invalid=10268, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 00:24:12,280 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 486 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:12,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1491 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:24:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-29 00:24:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 212. [2023-11-29 00:24:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.099526066350711) internal successors, (232), 211 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 00:24:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2023-11-29 00:24:12,285 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 105 [2023-11-29 00:24:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2023-11-29 00:24:12,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.8783783783783785) internal successors, (213), 75 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:24:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2023-11-29 00:24:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 00:24:12,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:12,287 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:12,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 00:24:12,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 00:24:12,488 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:12,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1357797464, now seen corresponding path program 29 times [2023-11-29 00:24:12,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:12,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23721775] [2023-11-29 00:24:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 44 proven. 631 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:14,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:14,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23721775] [2023-11-29 00:24:14,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23721775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:14,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131820923] [2023-11-29 00:24:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:24:14,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:14,085 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:14,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 00:24:14,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 00:24:14,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:14,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 170 conjunts are in the unsatisfiable core [2023-11-29 00:24:14,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:15,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:24:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 44 proven. 631 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:15,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:15,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:24:15,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:24:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 44 proven. 631 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:15,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131820923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:15,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:15,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 62 [2023-11-29 00:24:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110633972] [2023-11-29 00:24:15,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:15,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 00:24:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 00:24:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3608, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 00:24:15,410 INFO L87 Difference]: Start difference. First operand 212 states and 232 transitions. Second operand has 62 states, 62 states have (on average 2.4838709677419355) internal successors, (154), 62 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 00:24:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:18,824 INFO L93 Difference]: Finished difference Result 400 states and 435 transitions. [2023-11-29 00:24:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 00:24:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4838709677419355) internal successors, (154), 62 states have internal predecessors, (154), 0 states have call successors, (0), 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 109 [2023-11-29 00:24:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:18,825 INFO L225 Difference]: With dead ends: 400 [2023-11-29 00:24:18,826 INFO L226 Difference]: Without dead ends: 223 [2023-11-29 00:24:18,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=853, Invalid=12719, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 00:24:18,827 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 604 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 2724 SdHoareTripleChecker+Invalid, 4473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:18,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 2724 Invalid, 4473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4440 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:24:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-29 00:24:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2023-11-29 00:24:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0976744186046512) internal successors, (236), 215 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 00:24:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 236 transitions. [2023-11-29 00:24:18,832 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 236 transitions. Word has length 109 [2023-11-29 00:24:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:18,832 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 236 transitions. [2023-11-29 00:24:18,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4838709677419355) internal successors, (154), 62 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 00:24:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 236 transitions. [2023-11-29 00:24:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 00:24:18,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:18,833 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:18,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 00:24:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 00:24:19,034 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:19,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1645439325, now seen corresponding path program 30 times [2023-11-29 00:24:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:19,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748703417] [2023-11-29 00:24:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 210 proven. 496 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:20,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:20,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748703417] [2023-11-29 00:24:20,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748703417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:20,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923001757] [2023-11-29 00:24:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:24:20,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:20,401 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 00:24:21,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 00:24:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:21,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 00:24:21,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 225 proven. 481 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:22,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:23,915 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 7 treesize of output 5 [2023-11-29 00:24:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 225 proven. 481 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:24,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923001757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:24,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:24,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 93 [2023-11-29 00:24:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77136859] [2023-11-29 00:24:24,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 00:24:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 00:24:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=7520, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 00:24:24,342 INFO L87 Difference]: Start difference. First operand 216 states and 236 transitions. Second operand has 94 states, 93 states have (on average 3.021505376344086) internal successors, (281), 94 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 00:24:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:26,582 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2023-11-29 00:24:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 00:24:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.021505376344086) internal successors, (281), 94 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-29 00:24:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:26,584 INFO L225 Difference]: With dead ends: 273 [2023-11-29 00:24:26,584 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 00:24:26,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 149 SyntacticMatches, 17 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6455 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2292, Invalid=14738, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 00:24:26,585 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 612 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:26,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1395 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:24:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 00:24:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 224. [2023-11-29 00:24:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0986547085201794) internal successors, (245), 223 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 00:24:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 245 transitions. [2023-11-29 00:24:26,589 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 245 transitions. Word has length 111 [2023-11-29 00:24:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:26,589 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 245 transitions. [2023-11-29 00:24:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.021505376344086) internal successors, (281), 94 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 00:24:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 245 transitions. [2023-11-29 00:24:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 00:24:26,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:26,590 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:26,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-29 00:24:26,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:26,790 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:26,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:26,791 INFO L85 PathProgramCache]: Analyzing trace with hash 341646887, now seen corresponding path program 31 times [2023-11-29 00:24:26,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:26,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857683486] [2023-11-29 00:24:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 47 proven. 721 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:28,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857683486] [2023-11-29 00:24:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857683486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457628621] [2023-11-29 00:24:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:24:28,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:28,517 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:28,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 00:24:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:28,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 180 conjunts are in the unsatisfiable core [2023-11-29 00:24:28,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:29,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:24:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 47 proven. 721 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:29,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:29,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:24:29,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:24:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 47 proven. 721 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457628621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:29,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 65 [2023-11-29 00:24:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481105390] [2023-11-29 00:24:29,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 00:24:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 00:24:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3978, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 00:24:29,673 INFO L87 Difference]: Start difference. First operand 224 states and 245 transitions. Second operand has 65 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 00:24:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:33,485 INFO L93 Difference]: Finished difference Result 423 states and 460 transitions. [2023-11-29 00:24:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:24:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-29 00:24:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:33,487 INFO L225 Difference]: With dead ends: 423 [2023-11-29 00:24:33,487 INFO L226 Difference]: Without dead ends: 235 [2023-11-29 00:24:33,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=898, Invalid=14108, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 00:24:33,488 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 409 mSDsluCounter, 3078 mSDsCounter, 0 mSdLazyCounter, 5094 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 5113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:33,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 3148 Invalid, 5113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5094 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:24:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-29 00:24:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2023-11-29 00:24:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0969162995594715) internal successors, (249), 227 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 00:24:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 249 transitions. [2023-11-29 00:24:33,493 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 249 transitions. Word has length 115 [2023-11-29 00:24:33,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:33,493 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 249 transitions. [2023-11-29 00:24:33,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 00:24:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 249 transitions. [2023-11-29 00:24:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 00:24:33,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:33,495 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:33,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 00:24:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:33,695 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -527850270, now seen corresponding path program 32 times [2023-11-29 00:24:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:33,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937785010] [2023-11-29 00:24:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 240 proven. 561 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937785010] [2023-11-29 00:24:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937785010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073644310] [2023-11-29 00:24:35,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:24:35,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:35,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:35,527 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:35,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 00:24:35,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:24:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:35,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 163 conjunts are in the unsatisfiable core [2023-11-29 00:24:35,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 256 proven. 545 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:36,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:37,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:24:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 256 proven. 545 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:38,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073644310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:38,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:38,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 81 [2023-11-29 00:24:38,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264413660] [2023-11-29 00:24:38,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:38,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 00:24:38,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:38,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 00:24:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=5873, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 00:24:38,135 INFO L87 Difference]: Start difference. First operand 228 states and 249 transitions. Second operand has 82 states, 81 states have (on average 2.876543209876543) internal successors, (233), 82 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 00:24:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:41,640 INFO L93 Difference]: Finished difference Result 288 states and 311 transitions. [2023-11-29 00:24:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 00:24:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.876543209876543) internal successors, (233), 82 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 117 [2023-11-29 00:24:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:41,642 INFO L225 Difference]: With dead ends: 288 [2023-11-29 00:24:41,642 INFO L226 Difference]: Without dead ends: 288 [2023-11-29 00:24:41,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 174 SyntacticMatches, 18 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5423 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1590, Invalid=12930, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 00:24:41,643 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 550 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:41,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1955 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3474 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:24:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-29 00:24:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 236. [2023-11-29 00:24:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.097872340425532) internal successors, (258), 235 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 00:24:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 258 transitions. [2023-11-29 00:24:41,649 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 258 transitions. Word has length 117 [2023-11-29 00:24:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:41,649 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 258 transitions. [2023-11-29 00:24:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.876543209876543) internal successors, (233), 82 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 00:24:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 258 transitions. [2023-11-29 00:24:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 00:24:41,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:41,650 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:41,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 00:24:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:41,851 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:41,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1992624922, now seen corresponding path program 33 times [2023-11-29 00:24:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:41,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714574169] [2023-11-29 00:24:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:41,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 50 proven. 817 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:43,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714574169] [2023-11-29 00:24:43,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714574169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132617739] [2023-11-29 00:24:43,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:24:43,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:43,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:43,833 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:43,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 00:24:44,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-29 00:24:44,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:44,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 194 conjunts are in the unsatisfiable core [2023-11-29 00:24:44,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:45,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:24:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 50 proven. 817 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:45,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:45,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:24:45,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:24:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 50 proven. 817 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132617739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:46,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:46,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 42] total 86 [2023-11-29 00:24:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923443170] [2023-11-29 00:24:46,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:46,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 00:24:46,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 00:24:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=7057, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 00:24:46,747 INFO L87 Difference]: Start difference. First operand 236 states and 258 transitions. Second operand has 86 states, 86 states have (on average 2.755813953488372) internal successors, (237), 86 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 00:24:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:51,596 INFO L93 Difference]: Finished difference Result 446 states and 485 transitions. [2023-11-29 00:24:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 00:24:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.755813953488372) internal successors, (237), 86 states have internal predecessors, (237), 0 states have call successors, (0), 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 121 [2023-11-29 00:24:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:51,598 INFO L225 Difference]: With dead ends: 446 [2023-11-29 00:24:51,598 INFO L226 Difference]: Without dead ends: 247 [2023-11-29 00:24:51,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1017, Invalid=19575, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 00:24:51,599 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 442 mSDsluCounter, 4073 mSDsCounter, 0 mSdLazyCounter, 6674 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 6694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 6674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:51,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 4147 Invalid, 6694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 6674 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 00:24:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-29 00:24:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2023-11-29 00:24:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.096234309623431) internal successors, (262), 239 states have internal predecessors, (262), 0 states have call successors, (0), 0 states 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 00:24:51,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 262 transitions. [2023-11-29 00:24:51,603 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 262 transitions. Word has length 121 [2023-11-29 00:24:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:51,603 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 262 transitions. [2023-11-29 00:24:51,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.755813953488372) internal successors, (237), 86 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 00:24:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 262 transitions. [2023-11-29 00:24:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 00:24:51,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:51,604 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:24:51,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 00:24:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 00:24:51,805 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:24:51,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1416084639, now seen corresponding path program 34 times [2023-11-29 00:24:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741530488] [2023-11-29 00:24:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 272 proven. 630 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741530488] [2023-11-29 00:24:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741530488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748654041] [2023-11-29 00:24:54,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:24:54,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:54,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:54,024 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:54,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 00:24:54,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:24:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:24:54,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 169 conjunts are in the unsatisfiable core [2023-11-29 00:24:54,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 306 proven. 596 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:55,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:56,430 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 7 treesize of output 5 [2023-11-29 00:24:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 306 proven. 596 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:24:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748654041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:56,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:24:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 86 [2023-11-29 00:24:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536691292] [2023-11-29 00:24:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-11-29 00:24:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-11-29 00:24:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=853, Invalid=6629, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 00:24:56,978 INFO L87 Difference]: Start difference. First operand 240 states and 262 transitions. Second operand has 87 states, 86 states have (on average 2.895348837209302) internal successors, (249), 87 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 00:25:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:00,388 INFO L93 Difference]: Finished difference Result 303 states and 327 transitions. [2023-11-29 00:25:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 00:25:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 2.895348837209302) internal successors, (249), 87 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) Word has length 123 [2023-11-29 00:25:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:00,390 INFO L225 Difference]: With dead ends: 303 [2023-11-29 00:25:00,390 INFO L226 Difference]: Without dead ends: 303 [2023-11-29 00:25:00,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 183 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6016 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1693, Invalid=14057, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 00:25:00,391 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1038 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 3537 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 3539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:00,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 2138 Invalid, 3539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3537 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:25:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-29 00:25:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 248. [2023-11-29 00:25:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.097165991902834) internal successors, (271), 247 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:25:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 271 transitions. [2023-11-29 00:25:00,396 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 271 transitions. Word has length 123 [2023-11-29 00:25:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:00,396 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 271 transitions. [2023-11-29 00:25:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 2.895348837209302) internal successors, (249), 87 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 00:25:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 271 transitions. [2023-11-29 00:25:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 00:25:00,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:00,397 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:00,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 00:25:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 00:25:00,597 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:00,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:00,598 INFO L85 PathProgramCache]: Analyzing trace with hash -691520539, now seen corresponding path program 35 times [2023-11-29 00:25:00,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459469014] [2023-11-29 00:25:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:00,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 53 proven. 919 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:02,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459469014] [2023-11-29 00:25:02,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459469014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:02,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668041999] [2023-11-29 00:25:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:25:02,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:02,610 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:02,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 00:25:03,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-29 00:25:03,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:03,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 200 conjunts are in the unsatisfiable core [2023-11-29 00:25:03,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:04,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:25:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 53 proven. 919 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:04,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:04,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:25:04,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:25:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 53 proven. 919 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668041999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:04,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:04,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 71 [2023-11-29 00:25:04,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484133935] [2023-11-29 00:25:04,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:04,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 00:25:04,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 00:25:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4772, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 00:25:04,539 INFO L87 Difference]: Start difference. First operand 248 states and 271 transitions. Second operand has 71 states, 71 states have (on average 2.507042253521127) internal successors, (178), 71 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 00:25:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:08,983 INFO L93 Difference]: Finished difference Result 469 states and 510 transitions. [2023-11-29 00:25:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 00:25:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.507042253521127) internal successors, (178), 71 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 127 [2023-11-29 00:25:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:08,984 INFO L225 Difference]: With dead ends: 469 [2023-11-29 00:25:08,984 INFO L226 Difference]: Without dead ends: 259 [2023-11-29 00:25:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=988, Invalid=17102, Unknown=0, NotChecked=0, Total=18090 [2023-11-29 00:25:08,985 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 548 mSDsluCounter, 3632 mSDsCounter, 0 mSdLazyCounter, 5867 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 5906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:08,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 3710 Invalid, 5906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5867 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:25:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-29 00:25:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2023-11-29 00:25:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.095617529880478) internal successors, (275), 251 states have internal predecessors, (275), 0 states have call successors, (0), 0 states 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 00:25:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 275 transitions. [2023-11-29 00:25:08,989 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 275 transitions. Word has length 127 [2023-11-29 00:25:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:08,990 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 275 transitions. [2023-11-29 00:25:08,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.507042253521127) internal successors, (178), 71 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 00:25:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 275 transitions. [2023-11-29 00:25:08,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 00:25:08,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:08,991 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:08,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 00:25:09,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 00:25:09,191 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:09,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1877900768, now seen corresponding path program 36 times [2023-11-29 00:25:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:09,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583718948] [2023-11-29 00:25:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 306 proven. 703 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583718948] [2023-11-29 00:25:11,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583718948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46177038] [2023-11-29 00:25:11,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:25:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:11,560 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:11,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 00:25:13,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-29 00:25:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:13,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-29 00:25:13,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 342 proven. 667 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:15,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:17,314 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 7 treesize of output 5 [2023-11-29 00:25:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 342 proven. 667 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:17,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46177038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:17,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:17,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 109 [2023-11-29 00:25:17,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665564686] [2023-11-29 00:25:17,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:17,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-29 00:25:17,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-29 00:25:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=10313, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 00:25:17,926 INFO L87 Difference]: Start difference. First operand 252 states and 275 transitions. Second operand has 110 states, 109 states have (on average 3.055045871559633) internal successors, (333), 110 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 00:25:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:21,501 INFO L93 Difference]: Finished difference Result 318 states and 343 transitions. [2023-11-29 00:25:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 00:25:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 3.055045871559633) internal successors, (333), 110 states have internal predecessors, (333), 0 states have call successors, (0), 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 129 [2023-11-29 00:25:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:21,503 INFO L225 Difference]: With dead ends: 318 [2023-11-29 00:25:21,503 INFO L226 Difference]: Without dead ends: 318 [2023-11-29 00:25:21,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 173 SyntacticMatches, 19 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8879 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=3009, Invalid=19641, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 00:25:21,505 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 792 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 3153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:21,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 1812 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3153 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:25:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-11-29 00:25:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 260. [2023-11-29 00:25:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0965250965250966) internal successors, (284), 259 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:25:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 284 transitions. [2023-11-29 00:25:21,509 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 284 transitions. Word has length 129 [2023-11-29 00:25:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:21,509 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 284 transitions. [2023-11-29 00:25:21,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 3.055045871559633) internal successors, (333), 110 states have internal predecessors, (333), 0 states have call successors, (0), 0 states 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 00:25:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 284 transitions. [2023-11-29 00:25:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 00:25:21,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:21,510 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:21,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 00:25:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 00:25:21,710 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:21,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1257636644, now seen corresponding path program 37 times [2023-11-29 00:25:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412722989] [2023-11-29 00:25:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:21,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1087 backedges. 56 proven. 1027 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:23,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:23,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412722989] [2023-11-29 00:25:23,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412722989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:23,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445425051] [2023-11-29 00:25:23,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:25:23,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:23,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:23,870 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:23,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 00:25:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:24,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 210 conjunts are in the unsatisfiable core [2023-11-29 00:25:24,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:24,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:25:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1087 backedges. 56 proven. 1027 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:25,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:25,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:25:25,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:25:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1087 backedges. 56 proven. 1027 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445425051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:25,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:25,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 74 [2023-11-29 00:25:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775141723] [2023-11-29 00:25:25,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 00:25:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 00:25:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5196, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 00:25:25,338 INFO L87 Difference]: Start difference. First operand 260 states and 284 transitions. Second operand has 74 states, 74 states have (on average 2.5135135135135136) internal successors, (186), 74 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 00:25:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:30,298 INFO L93 Difference]: Finished difference Result 492 states and 535 transitions. [2023-11-29 00:25:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 00:25:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.5135135135135136) internal successors, (186), 74 states have internal predecessors, (186), 0 states have call successors, (0), 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 133 [2023-11-29 00:25:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:30,300 INFO L225 Difference]: With dead ends: 492 [2023-11-29 00:25:30,300 INFO L226 Difference]: Without dead ends: 271 [2023-11-29 00:25:30,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1033, Invalid=18707, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 00:25:30,302 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 366 mSDsluCounter, 3968 mSDsCounter, 0 mSdLazyCounter, 6524 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 4050 SdHoareTripleChecker+Invalid, 6546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:30,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 4050 Invalid, 6546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6524 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:25:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-29 00:25:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2023-11-29 00:25:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0950570342205324) internal successors, (288), 263 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 00:25:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 288 transitions. [2023-11-29 00:25:30,305 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 288 transitions. Word has length 133 [2023-11-29 00:25:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:30,306 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 288 transitions. [2023-11-29 00:25:30,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.5135135135135136) internal successors, (186), 74 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 00:25:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 288 transitions. [2023-11-29 00:25:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 00:25:30,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:30,307 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:30,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 00:25:30,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:30,507 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:30,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1321365791, now seen corresponding path program 38 times [2023-11-29 00:25:30,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:30,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388596363] [2023-11-29 00:25:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 342 proven. 780 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388596363] [2023-11-29 00:25:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388596363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388829011] [2023-11-29 00:25:32,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:25:32,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:32,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:32,483 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:32,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 00:25:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:25:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:32,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 190 conjunts are in the unsatisfiable core [2023-11-29 00:25:32,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 361 proven. 761 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:33,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:34,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:25:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 361 proven. 761 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388829011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:35,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:35,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 93 [2023-11-29 00:25:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558245958] [2023-11-29 00:25:35,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 00:25:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 00:25:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=7724, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 00:25:35,603 INFO L87 Difference]: Start difference. First operand 264 states and 288 transitions. Second operand has 94 states, 93 states have (on average 2.89247311827957) internal successors, (269), 94 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:25:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:39,035 INFO L93 Difference]: Finished difference Result 333 states and 359 transitions. [2023-11-29 00:25:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 00:25:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.89247311827957) internal successors, (269), 94 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-11-29 00:25:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:39,037 INFO L225 Difference]: With dead ends: 333 [2023-11-29 00:25:39,037 INFO L226 Difference]: Without dead ends: 333 [2023-11-29 00:25:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 201 SyntacticMatches, 21 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2037, Invalid=17145, Unknown=0, NotChecked=0, Total=19182 [2023-11-29 00:25:39,038 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 692 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:39,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 2273 Invalid, 3987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3986 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:25:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-29 00:25:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 272. [2023-11-29 00:25:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.0959409594095941) internal successors, (297), 271 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 00:25:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 297 transitions. [2023-11-29 00:25:39,043 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 297 transitions. Word has length 135 [2023-11-29 00:25:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:39,043 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 297 transitions. [2023-11-29 00:25:39,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.89247311827957) internal successors, (269), 94 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:25:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 297 transitions. [2023-11-29 00:25:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 00:25:39,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:39,044 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:39,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 00:25:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:39,244 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:39,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1502173859, now seen corresponding path program 39 times [2023-11-29 00:25:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:39,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859467588] [2023-11-29 00:25:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:39,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:41,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859467588] [2023-11-29 00:25:41,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859467588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62290064] [2023-11-29 00:25:41,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:25:41,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:41,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:41,707 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 00:25:42,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-29 00:25:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:42,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 224 conjunts are in the unsatisfiable core [2023-11-29 00:25:42,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:43,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:25:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:44,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:44,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:25:44,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:25:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62290064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:45,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 48] total 98 [2023-11-29 00:25:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415740112] [2023-11-29 00:25:45,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 00:25:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 00:25:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=9220, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 00:25:45,193 INFO L87 Difference]: Start difference. First operand 272 states and 297 transitions. Second operand has 98 states, 98 states have (on average 2.7857142857142856) internal successors, (273), 98 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 00:25:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:50,972 INFO L93 Difference]: Finished difference Result 515 states and 560 transitions. [2023-11-29 00:25:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-29 00:25:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.7857142857142856) internal successors, (273), 98 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 00:25:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:50,974 INFO L225 Difference]: With dead ends: 515 [2023-11-29 00:25:50,974 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:25:50,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6473 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1167, Invalid=25893, Unknown=0, NotChecked=0, Total=27060 [2023-11-29 00:25:50,976 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 622 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 8203 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 5124 SdHoareTripleChecker+Invalid, 8246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 8203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:50,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 5124 Invalid, 8246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 8203 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 00:25:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:25:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 276. [2023-11-29 00:25:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0945454545454545) internal successors, (301), 275 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 00:25:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 301 transitions. [2023-11-29 00:25:50,980 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 301 transitions. Word has length 139 [2023-11-29 00:25:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:50,980 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 301 transitions. [2023-11-29 00:25:50,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.7857142857142856) internal successors, (273), 98 states have internal predecessors, (273), 0 states have call successors, (0), 0 states 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 00:25:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 301 transitions. [2023-11-29 00:25:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 00:25:50,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:50,981 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:50,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 00:25:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:51,182 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:25:51,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash 961290334, now seen corresponding path program 40 times [2023-11-29 00:25:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646644788] [2023-11-29 00:25:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 380 proven. 861 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:53,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:53,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646644788] [2023-11-29 00:25:53,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646644788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:53,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463621939] [2023-11-29 00:25:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:25:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:53,371 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:53,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 00:25:53,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:25:53,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:25:53,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 196 conjunts are in the unsatisfiable core [2023-11-29 00:25:53,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 420 proven. 821 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:54,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:56,087 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 7 treesize of output 5 [2023-11-29 00:25:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 420 proven. 821 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:25:56,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463621939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:56,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:56,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 98 [2023-11-29 00:25:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083906538] [2023-11-29 00:25:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-11-29 00:25:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-11-29 00:25:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=8588, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 00:25:56,711 INFO L87 Difference]: Start difference. First operand 276 states and 301 transitions. Second operand has 99 states, 98 states have (on average 2.9081632653061225) internal successors, (285), 99 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:26:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:00,601 INFO L93 Difference]: Finished difference Result 348 states and 375 transitions. [2023-11-29 00:26:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 00:26:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 2.9081632653061225) internal successors, (285), 99 states have internal predecessors, (285), 0 states have call successors, (0), 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 141 [2023-11-29 00:26:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:00,603 INFO L225 Difference]: With dead ends: 348 [2023-11-29 00:26:00,603 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 00:26:00,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 210 SyntacticMatches, 21 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8023 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2152, Invalid=18440, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 00:26:00,605 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 813 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 5358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 3060 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:00,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 3060 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5358 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:26:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 00:26:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 284. [2023-11-29 00:26:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0954063604240283) internal successors, (310), 283 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 00:26:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 310 transitions. [2023-11-29 00:26:00,610 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 310 transitions. Word has length 141 [2023-11-29 00:26:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:00,611 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 310 transitions. [2023-11-29 00:26:00,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 2.9081632653061225) internal successors, (285), 99 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 00:26:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 310 transitions. [2023-11-29 00:26:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 00:26:00,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:00,612 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:00,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 00:26:00,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:00,813 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:26:00,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:00,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2098942562, now seen corresponding path program 41 times [2023-11-29 00:26:00,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:00,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096323141] [2023-11-29 00:26:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096323141] [2023-11-29 00:26:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096323141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848492024] [2023-11-29 00:26:03,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:26:03,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:03,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:03,331 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:03,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 00:26:04,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-29 00:26:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:04,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 230 conjunts are in the unsatisfiable core [2023-11-29 00:26:04,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:05,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:26:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:05,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:05,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:26:05,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:26:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1327 backedges. 62 proven. 1261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848492024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:05,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:05,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 80 [2023-11-29 00:26:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543966438] [2023-11-29 00:26:05,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 00:26:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 00:26:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=6098, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 00:26:05,762 INFO L87 Difference]: Start difference. First operand 284 states and 310 transitions. Second operand has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 00:26:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:11,200 INFO L93 Difference]: Finished difference Result 538 states and 585 transitions. [2023-11-29 00:26:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-11-29 00:26:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 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 145 [2023-11-29 00:26:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:11,201 INFO L225 Difference]: With dead ends: 538 [2023-11-29 00:26:11,201 INFO L226 Difference]: Without dead ends: 295 [2023-11-29 00:26:11,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1123, Invalid=22133, Unknown=0, NotChecked=0, Total=23256 [2023-11-29 00:26:11,203 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 726 mSDsluCounter, 4415 mSDsCounter, 0 mSdLazyCounter, 7225 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 4505 SdHoareTripleChecker+Invalid, 7270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 7225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:11,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 4505 Invalid, 7270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 7225 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 00:26:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-29 00:26:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 288. [2023-11-29 00:26:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0940766550522647) internal successors, (314), 287 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 00:26:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 314 transitions. [2023-11-29 00:26:11,208 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 314 transitions. Word has length 145 [2023-11-29 00:26:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:11,208 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 314 transitions. [2023-11-29 00:26:11,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 00:26:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 314 transitions. [2023-11-29 00:26:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 00:26:11,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:11,209 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:11,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 00:26:11,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-29 00:26:11,410 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:26:11,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:11,410 INFO L85 PathProgramCache]: Analyzing trace with hash -752640035, now seen corresponding path program 42 times [2023-11-29 00:26:11,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:11,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608460724] [2023-11-29 00:26:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 420 proven. 946 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:14,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608460724] [2023-11-29 00:26:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608460724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695036924] [2023-11-29 00:26:14,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:26:14,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:14,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:14,294 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:14,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 00:26:19,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-11-29 00:26:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:19,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-29 00:26:19,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 441 proven. 925 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:21,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:23,564 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 7 treesize of output 5 [2023-11-29 00:26:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 441 proven. 925 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695036924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:24,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:24,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 123 [2023-11-29 00:26:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33092609] [2023-11-29 00:26:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:24,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 00:26:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 00:26:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2194, Invalid=13058, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 00:26:24,336 INFO L87 Difference]: Start difference. First operand 288 states and 314 transitions. Second operand has 124 states, 123 states have (on average 3.065040650406504) internal successors, (377), 124 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 00:26:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:28,529 INFO L93 Difference]: Finished difference Result 363 states and 391 transitions. [2023-11-29 00:26:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 00:26:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 3.065040650406504) internal successors, (377), 124 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-11-29 00:26:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:28,532 INFO L225 Difference]: With dead ends: 363 [2023-11-29 00:26:28,532 INFO L226 Difference]: Without dead ends: 363 [2023-11-29 00:26:28,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 197 SyntacticMatches, 23 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11714 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3918, Invalid=25838, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 00:26:28,534 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 852 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:28,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1882 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2899 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:26:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-29 00:26:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 296. [2023-11-29 00:26:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0949152542372882) internal successors, (323), 295 states have internal predecessors, (323), 0 states have call successors, (0), 0 states 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 00:26:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 323 transitions. [2023-11-29 00:26:28,540 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 323 transitions. Word has length 147 [2023-11-29 00:26:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:28,541 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 323 transitions. [2023-11-29 00:26:28,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 3.065040650406504) internal successors, (377), 124 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 00:26:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 323 transitions. [2023-11-29 00:26:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 00:26:28,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:28,542 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:28,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 00:26:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 00:26:28,743 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:26:28,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1478031969, now seen corresponding path program 43 times [2023-11-29 00:26:28,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:28,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716722636] [2023-11-29 00:26:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:31,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716722636] [2023-11-29 00:26:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716722636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531873210] [2023-11-29 00:26:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:26:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:31,513 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:31,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 00:26:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:31,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 240 conjunts are in the unsatisfiable core [2023-11-29 00:26:31,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:32,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:26:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:32,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:32,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:26:32,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:26:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 65 proven. 1387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:33,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531873210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:33,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:33,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 52] total 83 [2023-11-29 00:26:33,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426735737] [2023-11-29 00:26:33,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:33,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 00:26:33,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 00:26:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=6576, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 00:26:33,081 INFO L87 Difference]: Start difference. First operand 296 states and 323 transitions. Second operand has 83 states, 83 states have (on average 2.5301204819277108) internal successors, (210), 83 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:39,471 INFO L93 Difference]: Finished difference Result 561 states and 610 transitions. [2023-11-29 00:26:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-11-29 00:26:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.5301204819277108) internal successors, (210), 83 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-29 00:26:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:39,473 INFO L225 Difference]: With dead ends: 561 [2023-11-29 00:26:39,474 INFO L226 Difference]: Without dead ends: 307 [2023-11-29 00:26:39,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1168, Invalid=23954, Unknown=0, NotChecked=0, Total=25122 [2023-11-29 00:26:39,475 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 646 mSDsluCounter, 5483 mSDsCounter, 0 mSdLazyCounter, 8806 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 5577 SdHoareTripleChecker+Invalid, 8853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 8806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:39,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 5577 Invalid, 8853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 8806 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 00:26:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-29 00:26:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2023-11-29 00:26:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.0936454849498327) internal successors, (327), 299 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 327 transitions. [2023-11-29 00:26:39,479 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 327 transitions. Word has length 151 [2023-11-29 00:26:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:39,479 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 327 transitions. [2023-11-29 00:26:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.5301204819277108) internal successors, (210), 83 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:26:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 327 transitions. [2023-11-29 00:26:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-29 00:26:39,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:39,480 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:39,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 00:26:39,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 00:26:39,681 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:26:39,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1299054692, now seen corresponding path program 44 times [2023-11-29 00:26:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:39,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070562430] [2023-11-29 00:26:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 462 proven. 1035 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:42,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070562430] [2023-11-29 00:26:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070562430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:42,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541588243] [2023-11-29 00:26:42,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:26:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:42,708 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 00:26:42,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:26:42,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:42,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 217 conjunts are in the unsatisfiable core [2023-11-29 00:26:42,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 484 proven. 1013 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:44,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:45,890 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 5 treesize of output 3 [2023-11-29 00:26:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 484 proven. 1013 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:46,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541588243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:46,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:46,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 105 [2023-11-29 00:26:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463055240] [2023-11-29 00:26:46,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:46,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 00:26:46,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 00:26:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=9827, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 00:26:46,715 INFO L87 Difference]: Start difference. First operand 300 states and 327 transitions. Second operand has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 106 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 00:26:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:51,951 INFO L93 Difference]: Finished difference Result 378 states and 407 transitions. [2023-11-29 00:26:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 00:26:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 106 states have internal predecessors, (305), 0 states have call successors, (0), 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 153 [2023-11-29 00:26:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:51,953 INFO L225 Difference]: With dead ends: 378 [2023-11-29 00:26:51,953 INFO L226 Difference]: Without dead ends: 378 [2023-11-29 00:26:51,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 228 SyntacticMatches, 24 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9539 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2538, Invalid=21954, Unknown=0, NotChecked=0, Total=24492 [2023-11-29 00:26:51,954 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 946 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 5539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:51,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 3507 Invalid, 5539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 00:26:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-29 00:26:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 308. [2023-11-29 00:26:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.0944625407166124) internal successors, (336), 307 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 00:26:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 336 transitions. [2023-11-29 00:26:51,958 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 336 transitions. Word has length 153 [2023-11-29 00:26:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:51,959 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 336 transitions. [2023-11-29 00:26:51,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 2.9047619047619047) internal successors, (305), 106 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 00:26:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 336 transitions. [2023-11-29 00:26:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-29 00:26:51,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:51,959 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:51,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-29 00:26:52,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 00:26:52,160 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:26:52,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 365126304, now seen corresponding path program 45 times [2023-11-29 00:26:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:52,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169637501] [2023-11-29 00:26:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 68 proven. 1519 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:55,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:55,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169637501] [2023-11-29 00:26:55,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169637501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:55,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044145791] [2023-11-29 00:26:55,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:26:55,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:55,116 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 00:26:58,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-29 00:26:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:58,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 250 conjunts are in the unsatisfiable core [2023-11-29 00:26:58,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:59,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:26:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 68 proven. 1519 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:59,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:59,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:26:59,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:26:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 68 proven. 1519 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:26:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044145791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:26:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:26:59,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 86 [2023-11-29 00:26:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178461694] [2023-11-29 00:26:59,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:59,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 00:26:59,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 00:26:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7072, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 00:26:59,947 INFO L87 Difference]: Start difference. First operand 308 states and 336 transitions. Second operand has 86 states, 86 states have (on average 2.5348837209302326) internal successors, (218), 86 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 00:27:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:06,576 INFO L93 Difference]: Finished difference Result 584 states and 635 transitions. [2023-11-29 00:27:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-29 00:27:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.5348837209302326) internal successors, (218), 86 states have internal predecessors, (218), 0 states have call successors, (0), 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 157 [2023-11-29 00:27:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:06,578 INFO L225 Difference]: With dead ends: 584 [2023-11-29 00:27:06,578 INFO L226 Difference]: Without dead ends: 319 [2023-11-29 00:27:06,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1213, Invalid=25847, Unknown=0, NotChecked=0, Total=27060 [2023-11-29 00:27:06,580 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 440 mSDsluCounter, 5783 mSDsCounter, 0 mSdLazyCounter, 9373 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 5881 SdHoareTripleChecker+Invalid, 9422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 9373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:06,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 5881 Invalid, 9422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 9373 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 00:27:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-29 00:27:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2023-11-29 00:27:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0932475884244373) internal successors, (340), 311 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 00:27:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 340 transitions. [2023-11-29 00:27:06,583 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 340 transitions. Word has length 157 [2023-11-29 00:27:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 340 transitions. [2023-11-29 00:27:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.5348837209302326) internal successors, (218), 86 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 00:27:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 340 transitions. [2023-11-29 00:27:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 00:27:06,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:06,585 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:06,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 00:27:06,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:06,785 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:27:06,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:06,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1582018661, now seen corresponding path program 46 times [2023-11-29 00:27:06,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:06,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735451284] [2023-11-29 00:27:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 506 proven. 1128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735451284] [2023-11-29 00:27:09,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735451284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:09,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558492217] [2023-11-29 00:27:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:27:09,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:09,431 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:09,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 00:27:09,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:27:09,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:27:09,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 223 conjunts are in the unsatisfiable core [2023-11-29 00:27:09,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 552 proven. 1082 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:10,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:12,614 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 7 treesize of output 5 [2023-11-29 00:27:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 552 proven. 1082 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:13,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558492217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:27:13,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:27:13,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 110 [2023-11-29 00:27:13,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217519307] [2023-11-29 00:27:13,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:13,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-11-29 00:27:13,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:13,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-11-29 00:27:13,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 00:27:13,408 INFO L87 Difference]: Start difference. First operand 312 states and 340 transitions. Second operand has 111 states, 110 states have (on average 2.918181818181818) internal successors, (321), 111 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 00:27:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:17,702 INFO L93 Difference]: Finished difference Result 393 states and 423 transitions. [2023-11-29 00:27:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:27:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 2.918181818181818) internal successors, (321), 111 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 159 [2023-11-29 00:27:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:17,704 INFO L225 Difference]: With dead ends: 393 [2023-11-29 00:27:17,704 INFO L226 Difference]: Without dead ends: 393 [2023-11-29 00:27:17,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 237 SyntacticMatches, 24 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10318 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2665, Invalid=23417, Unknown=0, NotChecked=0, Total=26082 [2023-11-29 00:27:17,705 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 979 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 5709 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:17,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 3519 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5709 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:27:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-29 00:27:17,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 320. [2023-11-29 00:27:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.0940438871473355) internal successors, (349), 319 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 00:27:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 349 transitions. [2023-11-29 00:27:17,709 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 349 transitions. Word has length 159 [2023-11-29 00:27:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:17,710 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 349 transitions. [2023-11-29 00:27:17,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 2.918181818181818) internal successors, (321), 111 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 00:27:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 349 transitions. [2023-11-29 00:27:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 00:27:17,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:17,711 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:17,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-29 00:27:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:17,911 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:27:17,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash 187669279, now seen corresponding path program 47 times [2023-11-29 00:27:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:17,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474273813] [2023-11-29 00:27:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 71 proven. 1657 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474273813] [2023-11-29 00:27:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474273813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425941781] [2023-11-29 00:27:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:27:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:21,011 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:21,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 00:27:22,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-29 00:27:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:27:22,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 260 conjunts are in the unsatisfiable core [2023-11-29 00:27:22,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:23,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:27:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 71 proven. 1657 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:23,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:23,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:27:23,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:27:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 71 proven. 1657 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:24,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425941781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:27:24,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:27:24,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 89 [2023-11-29 00:27:24,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336051107] [2023-11-29 00:27:24,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:24,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 00:27:24,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:24,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 00:27:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=7586, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 00:27:24,008 INFO L87 Difference]: Start difference. First operand 320 states and 349 transitions. Second operand has 89 states, 89 states have (on average 2.539325842696629) internal successors, (226), 89 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 00:27:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:30,921 INFO L93 Difference]: Finished difference Result 607 states and 660 transitions. [2023-11-29 00:27:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-11-29 00:27:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.539325842696629) internal successors, (226), 89 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-29 00:27:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:30,923 INFO L225 Difference]: With dead ends: 607 [2023-11-29 00:27:30,923 INFO L226 Difference]: Without dead ends: 331 [2023-11-29 00:27:30,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5510 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1258, Invalid=27812, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 00:27:30,924 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 715 mSDsluCounter, 6510 mSDsCounter, 0 mSdLazyCounter, 10498 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 6612 SdHoareTripleChecker+Invalid, 10525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 10498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:30,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 6612 Invalid, 10525 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 10498 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 00:27:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-29 00:27:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2023-11-29 00:27:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.0928792569659442) internal successors, (353), 323 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 00:27:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 353 transitions. [2023-11-29 00:27:30,928 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 353 transitions. Word has length 163 [2023-11-29 00:27:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:30,928 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 353 transitions. [2023-11-29 00:27:30,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.539325842696629) internal successors, (226), 89 states have internal predecessors, (226), 0 states have call successors, (0), 0 states 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 00:27:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 353 transitions. [2023-11-29 00:27:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-29 00:27:30,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:30,929 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:30,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-29 00:27:31,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:31,130 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-11-29 00:27:31,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -8675366, now seen corresponding path program 48 times [2023-11-29 00:27:31,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:31,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311238740] [2023-11-29 00:27:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:31,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 552 proven. 1225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 00:27:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311238740] [2023-11-29 00:27:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311238740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940939953] [2023-11-29 00:27:34,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:27:34,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:34,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:34,451 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:34,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 00:27:40,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-29 00:27:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:27:40,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 00:27:40,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:40,172 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 00:27:40,524 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 17 treesize of output 13 [2023-11-29 00:27:42,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:27:42,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2023-11-29 00:27:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 23 proven. 94 refuted. 0 times theorem prover too weak. 1664 trivial. 0 not checked. [2023-11-29 00:27:42,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:43,719 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 17 treesize of output 15 [2023-11-29 00:27:43,722 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 26 treesize of output 20 [2023-11-29 00:27:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1664 trivial. 0 not checked. [2023-11-29 00:27:44,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940939953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:27:44,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:27:44,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 9, 9] total 72 [2023-11-29 00:27:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980787739] [2023-11-29 00:27:44,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 00:27:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 00:27:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:27:44,179 INFO L87 Difference]: Start difference. First operand 324 states and 353 transitions. Second operand has 73 states, 72 states have (on average 2.9583333333333335) internal successors, (213), 73 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:57,673 INFO L93 Difference]: Finished difference Result 402 states and 431 transitions. [2023-11-29 00:27:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 00:27:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.9583333333333335) internal successors, (213), 73 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2023-11-29 00:27:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:57,674 INFO L225 Difference]: With dead ends: 402 [2023-11-29 00:27:57,674 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 00:27:57,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5621 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=2690, Invalid=20872, Unknown=0, NotChecked=0, Total=23562 [2023-11-29 00:27:57,675 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1335 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:57,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 3025 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 00:27:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 00:27:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 00:27:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 00:27:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 00:27:57,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2023-11-29 00:27:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:57,676 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 00:27:57,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.9583333333333335) internal successors, (213), 73 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:27:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 00:27:57,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-29 00:27:57,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-29 00:27:57,680 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-29 00:27:57,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 00:27:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:57,883 INFO L445 BasicCegarLoop]: Path program histogram: [48, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:27:57,885 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 00:27:57,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 12:27:57 BoogieIcfgContainer [2023-11-29 00:27:57,887 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 00:27:57,887 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 00:27:57,887 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 00:27:57,888 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 00:27:57,888 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:22:17" (3/4) ... [2023-11-29 00:27:57,889 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 00:27:57,896 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-29 00:27:57,897 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-29 00:27:57,897 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 00:27:57,897 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-29 00:27:57,969 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 00:27:57,969 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 00:27:57,969 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 00:27:57,970 INFO L158 Benchmark]: Toolchain (without parser) took 341197.36ms. Allocated memory was 161.5MB in the beginning and 490.7MB in the end (delta: 329.3MB). Free memory was 130.7MB in the beginning and 297.9MB in the end (delta: -167.3MB). Peak memory consumption was 162.5MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,970 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:27:57,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.86ms. Allocated memory is still 161.5MB. Free memory was 130.4MB in the beginning and 113.8MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,970 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.14ms. Allocated memory is still 161.5MB. Free memory was 113.8MB in the beginning and 111.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,970 INFO L158 Benchmark]: Boogie Preprocessor took 45.10ms. Allocated memory is still 161.5MB. Free memory was 111.8MB in the beginning and 109.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,970 INFO L158 Benchmark]: RCFGBuilder took 381.97ms. Allocated memory is still 161.5MB. Free memory was 109.4MB in the beginning and 93.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,971 INFO L158 Benchmark]: TraceAbstraction took 340283.63ms. Allocated memory was 161.5MB in the beginning and 490.7MB in the end (delta: 329.3MB). Free memory was 92.4MB in the beginning and 303.1MB in the end (delta: -210.8MB). Peak memory consumption was 120.6MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,971 INFO L158 Benchmark]: Witness Printer took 82.02ms. Allocated memory is still 490.7MB. Free memory was 303.1MB in the beginning and 297.9MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 00:27:57,971 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 357.86ms. Allocated memory is still 161.5MB. Free memory was 130.4MB in the beginning and 113.8MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.14ms. Allocated memory is still 161.5MB. Free memory was 113.8MB in the beginning and 111.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.10ms. Allocated memory is still 161.5MB. Free memory was 111.8MB in the beginning and 109.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 381.97ms. Allocated memory is still 161.5MB. Free memory was 109.4MB in the beginning and 93.2MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 340283.63ms. Allocated memory was 161.5MB in the beginning and 490.7MB in the end (delta: 329.3MB). Free memory was 92.4MB in the beginning and 303.1MB in the end (delta: -210.8MB). Peak memory consumption was 120.6MB. Max. memory is 16.1GB. * Witness Printer took 82.02ms. Allocated memory is still 490.7MB. Free memory was 303.1MB in the beginning and 297.9MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 340.2s, OverallIterations: 73, TraceHistogramMax: 25, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 144.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22767 SdHoareTripleChecker+Valid, 59.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22767 mSDsluCounter, 97222 SdHoareTripleChecker+Invalid, 51.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 93862 mSDsCounter, 696 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 156854 IncrementalHoareTripleChecker+Invalid, 157550 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 696 mSolverCounterUnsat, 3360 mSDtfsCounter, 156854 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13235 GetRequests, 7707 SyntacticMatches, 317 SemanticMatches, 5211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168598 ImplicationChecksByTransitivity, 161.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=324occurred in iteration=72, InterpolantAutomatonStates: 2931, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 73 MinimizatonAttempts, 1299 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 28.0s SatisfiabilityAnalysisTime, 146.6s InterpolantComputationTime, 9768 NumberOfCodeBlocks, 9622 NumberOfCodeBlocksAsserted, 470 NumberOfCheckSat, 14327 ConstructedInterpolants, 122 QuantifiedInterpolants, 118776 SizeOfPredicates, 1898 NumberOfNonLiveVariables, 26578 ConjunctsInSsa, 6673 ConjunctsInUnsatCore, 193 InterpolantComputations, 16 PerfectInterpolantSequences, 20168/90870 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 00:27:58,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a72eb2e-7e16-4c57-b0b8-1dc656a8025c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE