./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/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_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/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 64bit --witnessprinter.graph.data.programhash 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:21:34,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:21:34,378 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-29 06:21:34,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:21:34,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:21:34,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:21:34,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:21:34,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:21:34,414 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:21:34,414 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:21:34,415 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:21:34,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:21:34,416 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:21:34,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:21:34,417 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:21:34,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:21:34,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:21:34,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:21:34,419 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:21:34,420 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:21:34,420 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:21:34,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:21:34,421 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:21:34,422 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:21:34,422 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:21:34,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:21:34,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:21:34,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:21:34,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:21:34,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:21:34,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:21:34,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:21:34,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:21:34,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:21:34,426 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:21:34,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:21:34,426 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:21:34,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:21:34,427 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_2676c92e-62b6-41cf-8498-58d647beb23a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89b7500933072598b3ae86cb9a0697a1fc30e47e1dd961db3afeb42e68cfc79e [2023-11-29 06:21:34,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:21:34,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:21:34,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:21:34,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:21:34,665 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:21:34,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2023-11-29 06:21:37,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:21:37,630 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:21:37,631 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/sv-benchmarks/c/memsafety-broom/sll-nested-sll.i [2023-11-29 06:21:37,656 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/data/2a59a1e17/2d40c9024c694041a331faf3b6f894c7/FLAGd875f19a7 [2023-11-29 06:21:37,671 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/data/2a59a1e17/2d40c9024c694041a331faf3b6f894c7 [2023-11-29 06:21:37,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:21:37,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:21:37,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:37,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:21:37,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:21:37,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:37" (1/1) ... [2023-11-29 06:21:37,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e17ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:37, skipping insertion in model container [2023-11-29 06:21:37,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:37" (1/1) ... [2023-11-29 06:21:37,754 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:21:38,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:38,018 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:21:38,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:38,080 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:21:38,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38 WrapperNode [2023-11-29 06:21:38,081 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:38,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:38,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:21:38,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:21:38,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,121 INFO L138 Inliner]: procedures = 122, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 89 [2023-11-29 06:21:38,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:38,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:21:38,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:21:38,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:21:38,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,136 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,161 INFO L175 MemorySlicer]: Split 16 memory accesses to 1 slices as follows [16]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 7 writes are split as follows [7]. [2023-11-29 06:21:38,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,170 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:21:38,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:21:38,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:21:38,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:21:38,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (1/1) ... [2023-11-29 06:21:38,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:21:38,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:38,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:21:38,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:21:38,242 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-11-29 06:21:38,243 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-11-29 06:21:38,243 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2023-11-29 06:21:38,243 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2023-11-29 06:21:38,243 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-29 06:21:38,243 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-29 06:21:38,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:21:38,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 06:21:38,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 06:21:38,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:21:38,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:21:38,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:21:38,354 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:21:38,356 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:21:38,636 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:21:38,684 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:21:38,684 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 06:21:38,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:38 BoogieIcfgContainer [2023-11-29 06:21:38,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:21:38,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:21:38,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:21:38,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:21:38,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:21:37" (1/3) ... [2023-11-29 06:21:38,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5195daa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:38, skipping insertion in model container [2023-11-29 06:21:38,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:38" (2/3) ... [2023-11-29 06:21:38,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5195daa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:38, skipping insertion in model container [2023-11-29 06:21:38,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:38" (3/3) ... [2023-11-29 06:21:38,694 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll.i [2023-11-29 06:21:38,709 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:21:38,709 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-29 06:21:38,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:21:38,759 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;@624de1a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:21:38,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-29 06:21:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 81 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:21:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 06:21:38,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:38,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 06:21:38,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:38,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 6991277, now seen corresponding path program 1 times [2023-11-29 06:21:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:38,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807828793] [2023-11-29 06:21:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:38,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:38,987 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 06:21:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807828793] [2023-11-29 06:21:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807828793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:38,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:38,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:21:38,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389415717] [2023-11-29 06:21:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:39,027 INFO L87 Difference]: Start difference. First operand has 91 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 81 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:39,133 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2023-11-29 06:21:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:39,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-29 06:21:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:39,143 INFO L225 Difference]: With dead ends: 89 [2023-11-29 06:21:39,143 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 06:21:39,145 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 06:21:39,148 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:39,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:21:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 06:21:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-29 06:21:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 42 states have (on average 2.0) internal successors, (84), 78 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:21:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2023-11-29 06:21:39,190 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 4 [2023-11-29 06:21:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:39,191 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2023-11-29 06:21:39,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2023-11-29 06:21:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 06:21:39,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:39,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 06:21:39,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:21:39,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:39,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash 6991278, now seen corresponding path program 1 times [2023-11-29 06:21:39,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:39,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488137582] [2023-11-29 06:21:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:39,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:39,279 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 06:21:39,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488137582] [2023-11-29 06:21:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488137582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:39,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:39,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:21:39,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733484543] [2023-11-29 06:21:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:39,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:39,283 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:39,356 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-11-29 06:21:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-29 06:21:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:39,358 INFO L225 Difference]: With dead ends: 86 [2023-11-29 06:21:39,359 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 06:21:39,359 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 06:21:39,361 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:39,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 133 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:21:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 06:21:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-29 06:21:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 76 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:21:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-29 06:21:39,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 4 [2023-11-29 06:21:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:39,372 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-29 06:21:39,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-29 06:21:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:21:39,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:39,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:21:39,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -939442667, now seen corresponding path program 1 times [2023-11-29 06:21:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:39,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001554369] [2023-11-29 06:21:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:39,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:39,476 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 06:21:39,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001554369] [2023-11-29 06:21:39,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001554369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:39,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:39,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:39,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003127463] [2023-11-29 06:21:39,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:39,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:39,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:39,479 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:21:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:39,604 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-11-29 06:21:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:21:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-29 06:21:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:39,606 INFO L225 Difference]: With dead ends: 85 [2023-11-29 06:21:39,606 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 06:21:39,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 06:21:39,607 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:39,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:21:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 06:21:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-29 06:21:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 75 states have internal predecessors, (81), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:21:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2023-11-29 06:21:39,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 11 [2023-11-29 06:21:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:39,623 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2023-11-29 06:21:39,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:21:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2023-11-29 06:21:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 06:21:39,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:39,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:21:39,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:39,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash -939442666, now seen corresponding path program 1 times [2023-11-29 06:21:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040592612] [2023-11-29 06:21:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:39,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:39,780 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 06:21:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040592612] [2023-11-29 06:21:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040592612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:21:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719293495] [2023-11-29 06:21:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:39,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:21:39,783 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:21:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:39,900 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-11-29 06:21:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:21:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-29 06:21:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:39,902 INFO L225 Difference]: With dead ends: 84 [2023-11-29 06:21:39,902 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 06:21:39,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 06:21:39,904 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:39,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 160 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:21:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 06:21:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-29 06:21:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 74 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 06:21:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-11-29 06:21:39,912 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 11 [2023-11-29 06:21:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:39,913 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-11-29 06:21:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 06:21:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-11-29 06:21:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:21:39,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:39,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:21:39,915 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:39,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149562, now seen corresponding path program 1 times [2023-11-29 06:21:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:39,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693563696] [2023-11-29 06:21:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,295 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 06:21:40,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:40,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693563696] [2023-11-29 06:21:40,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693563696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:40,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:40,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:21:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24162275] [2023-11-29 06:21:40,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:40,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:21:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:21:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:21:40,298 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:40,656 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2023-11-29 06:21:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:21:40,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-11-29 06:21:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:40,659 INFO L225 Difference]: With dead ends: 101 [2023-11-29 06:21:40,659 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 06:21:40,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:21:40,661 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 25 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:40,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 282 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 06:21:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-11-29 06:21:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 81 states have internal predecessors, (95), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 06:21:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-11-29 06:21:40,671 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 18 [2023-11-29 06:21:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:40,671 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-11-29 06:21:40,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-11-29 06:21:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 06:21:40,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:40,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:21:40,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:40,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1093149563, now seen corresponding path program 1 times [2023-11-29 06:21:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:40,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661307025] [2023-11-29 06:21:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,178 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 06:21:41,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:41,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661307025] [2023-11-29 06:21:41,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661307025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:41,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:41,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:21:41,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481512772] [2023-11-29 06:21:41,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:41,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:21:41,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:41,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:21:41,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:21:41,181 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:41,588 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2023-11-29 06:21:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:21:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2023-11-29 06:21:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:41,590 INFO L225 Difference]: With dead ends: 106 [2023-11-29 06:21:41,590 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 06:21:41,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:21:41,591 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 19 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:41,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 320 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 06:21:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2023-11-29 06:21:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.8070175438596492) internal successors, (103), 87 states have internal predecessors, (103), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-29 06:21:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2023-11-29 06:21:41,601 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 18 [2023-11-29 06:21:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:41,601 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2023-11-29 06:21:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2023-11-29 06:21:41,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:21:41,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:41,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:41,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:21:41,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:41,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403091, now seen corresponding path program 1 times [2023-11-29 06:21:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:41,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420914193] [2023-11-29 06:21:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 06:21:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:21:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,817 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 06:21:41,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:41,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420914193] [2023-11-29 06:21:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420914193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:41,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749346529] [2023-11-29 06:21:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:41,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:41,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:41,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:41,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:21:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:41,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:21:41,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:41,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:42,036 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:42,070 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 06:21:42,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 06:21:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 06:21:42,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:42,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749346529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:42,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:42,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-29 06:21:42,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143119848] [2023-11-29 06:21:42,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:42,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:21:42,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:21:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-29 06:21:42,133 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:21:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:42,466 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2023-11-29 06:21:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:21:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2023-11-29 06:21:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:42,467 INFO L225 Difference]: With dead ends: 104 [2023-11-29 06:21:42,468 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 06:21:42,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-29 06:21:42,469 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:42,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 304 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 326 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2023-11-29 06:21:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 06:21:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-11-29 06:21:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.793103448275862) internal successors, (104), 87 states have internal predecessors, (104), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-29 06:21:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2023-11-29 06:21:42,477 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 20 [2023-11-29 06:21:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:42,477 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2023-11-29 06:21:42,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 06:21:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2023-11-29 06:21:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 06:21:42,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:42,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:42,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:42,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:42,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1711403090, now seen corresponding path program 1 times [2023-11-29 06:21:42,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:42,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627927330] [2023-11-29 06:21:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 06:21:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:42,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:21:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:43,028 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 06:21:43,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627927330] [2023-11-29 06:21:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627927330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161073631] [2023-11-29 06:21:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:43,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:43,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:43,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:43,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:21:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:43,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:21:43,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:43,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:43,317 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:43,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:43,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:21:43,350 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:21:43,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:21:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 06:21:43,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161073631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:43,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:43,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-29 06:21:43,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145932181] [2023-11-29 06:21:43,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:43,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:21:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:21:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-11-29 06:21:43,482 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 06:21:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:44,003 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-11-29 06:21:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:21:44,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 20 [2023-11-29 06:21:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:44,005 INFO L225 Difference]: With dead ends: 103 [2023-11-29 06:21:44,005 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 06:21:44,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=349, Unknown=1, NotChecked=38, Total=462 [2023-11-29 06:21:44,007 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:44,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 497 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 554 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2023-11-29 06:21:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 06:21:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-29 06:21:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 86 states have internal predecessors, (102), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-29 06:21:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2023-11-29 06:21:44,014 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 20 [2023-11-29 06:21:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2023-11-29 06:21:44,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 06:21:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2023-11-29 06:21:44,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:21:44,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:44,016 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, 1, 1, 1] [2023-11-29 06:21:44,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:21:44,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:44,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:44,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -222925609, now seen corresponding path program 1 times [2023-11-29 06:21:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:44,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760914735] [2023-11-29 06:21:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,317 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 06:21:44,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760914735] [2023-11-29 06:21:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760914735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806962202] [2023-11-29 06:21:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:44,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:21:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:21:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:21:44,319 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:44,487 INFO L93 Difference]: Finished difference Result 122 states and 152 transitions. [2023-11-29 06:21:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:21:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-29 06:21:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:44,489 INFO L225 Difference]: With dead ends: 122 [2023-11-29 06:21:44,489 INFO L226 Difference]: Without dead ends: 122 [2023-11-29 06:21:44,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:21:44,490 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:44,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 215 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:21:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-29 06:21:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2023-11-29 06:21:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 94 states have internal predecessors, (122), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-29 06:21:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2023-11-29 06:21:44,497 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 23 [2023-11-29 06:21:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:44,498 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2023-11-29 06:21:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2023-11-29 06:21:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 06:21:44,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:44,499 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, 1, 1, 1] [2023-11-29 06:21:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:21:44,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:44,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash -222925608, now seen corresponding path program 1 times [2023-11-29 06:21:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:44,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884191866] [2023-11-29 06:21:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:44,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:44,714 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 06:21:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884191866] [2023-11-29 06:21:44,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884191866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:44,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:44,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:21:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505265984] [2023-11-29 06:21:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:21:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:21:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:44,716 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:44,928 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2023-11-29 06:21:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:21:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-11-29 06:21:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:44,930 INFO L225 Difference]: With dead ends: 128 [2023-11-29 06:21:44,930 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 06:21:44,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:21:44,931 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:44,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 403 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:21:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 06:21:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2023-11-29 06:21:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 101 states have internal predecessors, (133), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-29 06:21:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2023-11-29 06:21:44,937 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 23 [2023-11-29 06:21:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:44,938 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2023-11-29 06:21:44,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2023-11-29 06:21:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 06:21:44,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:44,939 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, 1] [2023-11-29 06:21:44,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:21:44,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:44,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:44,940 INFO L85 PathProgramCache]: Analyzing trace with hash -126915569, now seen corresponding path program 1 times [2023-11-29 06:21:44,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:44,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875776235] [2023-11-29 06:21:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:21:45,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875776235] [2023-11-29 06:21:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875776235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61067861] [2023-11-29 06:21:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:45,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:45,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:21:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:21:45,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:45,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:45,812 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-29 06:21:45,970 INFO L349 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2023-11-29 06:21:45,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 54 [2023-11-29 06:21:46,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:21:46,050 INFO L349 Elim1Store]: treesize reduction 79, result has 6.0 percent of original size [2023-11-29 06:21:46,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 17 [2023-11-29 06:21:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-29 06:21:46,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61067861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:46,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2023-11-29 06:21:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229841607] [2023-11-29 06:21:46,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:21:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:21:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=396, Unknown=1, NotChecked=42, Total=552 [2023-11-29 06:21:46,317 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:21:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:47,153 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2023-11-29 06:21:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:21:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 26 [2023-11-29 06:21:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:47,156 INFO L225 Difference]: With dead ends: 137 [2023-11-29 06:21:47,156 INFO L226 Difference]: Without dead ends: 137 [2023-11-29 06:21:47,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=664, Unknown=1, NotChecked=56, Total=930 [2023-11-29 06:21:47,157 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 34 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:47,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 491 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 662 Invalid, 15 Unknown, 120 Unchecked, 0.6s Time] [2023-11-29 06:21:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-29 06:21:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2023-11-29 06:21:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.75) internal successors, (140), 106 states have internal predecessors, (140), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:21:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2023-11-29 06:21:47,165 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 26 [2023-11-29 06:21:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:47,166 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2023-11-29 06:21:47,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-29 06:21:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2023-11-29 06:21:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 06:21:47,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:47,167 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, 1] [2023-11-29 06:21:47,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:21:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:47,373 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -126915568, now seen corresponding path program 1 times [2023-11-29 06:21:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084457907] [2023-11-29 06:21:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:48,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:21:48,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:48,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084457907] [2023-11-29 06:21:48,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084457907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:48,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734491751] [2023-11-29 06:21:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:48,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:48,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:21:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:48,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 06:21:48,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:48,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:48,358 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 06:21:48,654 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:48,678 WARN L876 $PredicateComparison]: unable to prove that (exists ((create_internal_~now~0.base Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (= (store (store |c_old(#length)| create_internal_~now~0.base (select |c_#length| create_internal_~now~0.base)) alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| create_internal_~now~0.base) 0) (= (select (store |c_old(#valid)| create_internal_~now~0.base 1) alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:48,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:48,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:48,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-29 06:21:48,771 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 06:21:48,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-29 06:21:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-29 06:21:48,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734491751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:49,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-11-29 06:21:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627233878] [2023-11-29 06:21:49,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:49,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:21:49,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:21:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=599, Unknown=2, NotChecked=102, Total=812 [2023-11-29 06:21:49,043 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 06:21:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:49,804 INFO L93 Difference]: Finished difference Result 141 states and 191 transitions. [2023-11-29 06:21:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:21:49,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2023-11-29 06:21:49,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:49,806 INFO L225 Difference]: With dead ends: 141 [2023-11-29 06:21:49,806 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 06:21:49,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=904, Unknown=2, NotChecked=126, Total=1190 [2023-11-29 06:21:49,808 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 46 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:49,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 412 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 649 Invalid, 0 Unknown, 248 Unchecked, 0.5s Time] [2023-11-29 06:21:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 06:21:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 122. [2023-11-29 06:21:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 104 states have internal predecessors, (137), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-29 06:21:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2023-11-29 06:21:49,814 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 26 [2023-11-29 06:21:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:49,815 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2023-11-29 06:21:49,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-29 06:21:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2023-11-29 06:21:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:21:49,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:49,816 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, 1, 1, 1, 1, 1] [2023-11-29 06:21:49,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:21:50,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:50,020 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:50,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 516824054, now seen corresponding path program 1 times [2023-11-29 06:21:50,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:50,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554733816] [2023-11-29 06:21:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,128 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 06:21:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554733816] [2023-11-29 06:21:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554733816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:50,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 06:21:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908328975] [2023-11-29 06:21:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:21:50,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:21:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:21:50,141 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:50,279 INFO L93 Difference]: Finished difference Result 133 states and 173 transitions. [2023-11-29 06:21:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:21:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-29 06:21:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:50,281 INFO L225 Difference]: With dead ends: 133 [2023-11-29 06:21:50,281 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 06:21:50,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:50,282 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 26 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:50,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 405 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:21:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 06:21:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2023-11-29 06:21:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 79 states have (on average 1.7215189873417722) internal successors, (136), 105 states have internal predecessors, (136), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-29 06:21:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2023-11-29 06:21:50,288 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 25 [2023-11-29 06:21:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:50,289 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2023-11-29 06:21:50,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2023-11-29 06:21:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:21:50,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:50,290 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, 1, 1, 1, 1, 1] [2023-11-29 06:21:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:21:50,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:50,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash 516984702, now seen corresponding path program 1 times [2023-11-29 06:21:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:50,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487479015] [2023-11-29 06:21:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:50,675 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 06:21:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:50,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487479015] [2023-11-29 06:21:50,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487479015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:50,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:50,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-29 06:21:50,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176241200] [2023-11-29 06:21:50,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:21:50,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:21:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:21:50,678 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:51,054 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2023-11-29 06:21:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:21:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-29 06:21:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:51,056 INFO L225 Difference]: With dead ends: 148 [2023-11-29 06:21:51,056 INFO L226 Difference]: Without dead ends: 148 [2023-11-29 06:21:51,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:21:51,057 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 37 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:51,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 538 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-29 06:21:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2023-11-29 06:21:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.6818181818181819) internal successors, (148), 114 states have internal predecessors, (148), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:21:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2023-11-29 06:21:51,064 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 25 [2023-11-29 06:21:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:51,065 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2023-11-29 06:21:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.9) internal successors, (19), 11 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2023-11-29 06:21:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 06:21:51,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:51,066 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, 1, 1, 1, 1, 1] [2023-11-29 06:21:51,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 06:21:51,067 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:51,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 516984703, now seen corresponding path program 1 times [2023-11-29 06:21:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954564165] [2023-11-29 06:21:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:51,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:51,537 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 06:21:51,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954564165] [2023-11-29 06:21:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954564165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:51,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:51,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-29 06:21:51,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34794225] [2023-11-29 06:21:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:51,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:21:51,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:21:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:21:51,539 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:51,943 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2023-11-29 06:21:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:21:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-11-29 06:21:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:51,944 INFO L225 Difference]: With dead ends: 147 [2023-11-29 06:21:51,944 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 06:21:51,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:21:51,945 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 36 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:51,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 660 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 06:21:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2023-11-29 06:21:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.6704545454545454) internal successors, (147), 114 states have internal predecessors, (147), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:21:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 177 transitions. [2023-11-29 06:21:51,952 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 177 transitions. Word has length 25 [2023-11-29 06:21:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:51,953 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 177 transitions. [2023-11-29 06:21:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:21:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 177 transitions. [2023-11-29 06:21:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:21:51,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:51,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 06:21:51,955 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:51,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:51,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1667922174, now seen corresponding path program 1 times [2023-11-29 06:21:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:51,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925104159] [2023-11-29 06:21:51,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:51,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 06:21:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:21:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 06:21:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:21:52,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:52,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925104159] [2023-11-29 06:21:52,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925104159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:52,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663500841] [2023-11-29 06:21:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:52,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:52,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:21:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:52,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:21:52,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:52,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:52,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:21:52,299 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 9 [2023-11-29 06:21:52,321 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:52,343 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 06:21:52,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 06:21:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-29 06:21:52,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:52,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663500841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:52,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:52,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-29 06:21:52,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820777199] [2023-11-29 06:21:52,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:52,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:21:52,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:21:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-29 06:21:52,393 INFO L87 Difference]: Start difference. First operand 133 states and 177 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 06:21:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:52,700 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2023-11-29 06:21:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:21:52,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-11-29 06:21:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:52,703 INFO L225 Difference]: With dead ends: 132 [2023-11-29 06:21:52,703 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 06:21:52,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-11-29 06:21:52,704 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 13 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:52,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 417 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 403 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2023-11-29 06:21:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 06:21:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-29 06:21:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.6590909090909092) internal successors, (146), 113 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:21:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2023-11-29 06:21:52,712 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 28 [2023-11-29 06:21:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:52,713 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2023-11-29 06:21:52,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 06:21:52,713 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2023-11-29 06:21:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:21:52,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:52,714 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:52,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:52,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:52,917 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:52,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1667922173, now seen corresponding path program 1 times [2023-11-29 06:21:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:52,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961976954] [2023-11-29 06:21:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-29 06:21:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:21:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-29 06:21:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:21:53,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:53,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961976954] [2023-11-29 06:21:53,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961976954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:53,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138591998] [2023-11-29 06:21:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:53,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:53,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:53,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:53,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:21:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:53,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 06:21:53,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:53,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:53,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:21:53,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:21:53,550 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 32 treesize of output 20 [2023-11-29 06:21:53,555 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 26 treesize of output 14 [2023-11-29 06:21:53,618 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:21:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:21:53,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:21:53,660 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:21:53,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:21:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-29 06:21:53,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:53,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138591998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:53,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:53,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-29 06:21:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561989878] [2023-11-29 06:21:53,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:21:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:21:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=294, Unknown=1, NotChecked=34, Total=380 [2023-11-29 06:21:53,765 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:21:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:54,257 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2023-11-29 06:21:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:21:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-11-29 06:21:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:54,258 INFO L225 Difference]: With dead ends: 131 [2023-11-29 06:21:54,259 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 06:21:54,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=466, Unknown=1, NotChecked=44, Total=600 [2023-11-29 06:21:54,260 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:54,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 523 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 577 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2023-11-29 06:21:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 06:21:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-29 06:21:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 112 states have internal predecessors, (145), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:21:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 175 transitions. [2023-11-29 06:21:54,266 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 175 transitions. Word has length 28 [2023-11-29 06:21:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:54,266 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 175 transitions. [2023-11-29 06:21:54,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:21:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 175 transitions. [2023-11-29 06:21:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:21:54,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:54,267 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, 1, 1, 1, 1, 1] [2023-11-29 06:21:54,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:54,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:21:54,473 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:21:54,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:54,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1393785251, now seen corresponding path program 1 times [2023-11-29 06:21:54,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:54,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107978399] [2023-11-29 06:21:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:54,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:54,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:21:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:55,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:21:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:21:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:55,248 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 06:21:55,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:55,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107978399] [2023-11-29 06:21:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107978399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:55,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758475454] [2023-11-29 06:21:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:55,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:55,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:55,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:55,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:21:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:55,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 06:21:55,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:55,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:21:55,528 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 06:21:55,532 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 06:21:55,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:21:55,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:21:55,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-29 06:21:55,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 06:21:55,856 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 06:21:55,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:56,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:21:56,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1236 treesize of output 1208 [2023-11-29 06:21:56,803 INFO L349 Elim1Store]: treesize reduction 258, result has 45.9 percent of original size [2023-11-29 06:21:56,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 1945 treesize of output 1977 [2023-11-29 06:22:04,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758475454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:04,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:04,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 27 [2023-11-29 06:22:04,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730903885] [2023-11-29 06:22:04,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:22:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:22:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:22:04,331 INFO L87 Difference]: Start difference. First operand 131 states and 175 transitions. Second operand has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:22:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:05,045 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2023-11-29 06:22:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:22:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-11-29 06:22:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:05,047 INFO L225 Difference]: With dead ends: 136 [2023-11-29 06:22:05,047 INFO L226 Difference]: Without dead ends: 136 [2023-11-29 06:22:05,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 06:22:05,048 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 27 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:05,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1025 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:22:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-29 06:22:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-11-29 06:22:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.6404494382022472) internal successors, (146), 113 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:22:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 176 transitions. [2023-11-29 06:22:05,054 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 176 transitions. Word has length 27 [2023-11-29 06:22:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:05,054 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 176 transitions. [2023-11-29 06:22:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:22:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 176 transitions. [2023-11-29 06:22:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:22:05,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:05,055 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, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:05,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:22:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:22:05,256 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:05,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -262943231, now seen corresponding path program 1 times [2023-11-29 06:22:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:05,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858917426] [2023-11-29 06:22:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:05,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:05,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:05,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:05,815 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 06:22:05,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:05,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858917426] [2023-11-29 06:22:05,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858917426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:05,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200959769] [2023-11-29 06:22:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:05,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:05,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:05,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:05,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:22:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:05,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 06:22:05,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-11-29 06:22:06,153 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 20 treesize of output 8 [2023-11-29 06:22:06,175 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 06:22:06,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:22:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200959769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:22:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2023-11-29 06:22:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819910002] [2023-11-29 06:22:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:22:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:22:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:22:06,178 INFO L87 Difference]: Start difference. First operand 132 states and 176 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:22:06,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:06,388 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2023-11-29 06:22:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:22:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-29 06:22:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:06,390 INFO L225 Difference]: With dead ends: 144 [2023-11-29 06:22:06,390 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 06:22:06,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:22:06,391 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 35 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:06,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 619 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:22:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 06:22:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2023-11-29 06:22:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 90 states have (on average 1.6222222222222222) internal successors, (146), 114 states have internal predecessors, (146), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:22:06,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 176 transitions. [2023-11-29 06:22:06,399 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 176 transitions. Word has length 28 [2023-11-29 06:22:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:06,400 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 176 transitions. [2023-11-29 06:22:06,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:22:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 176 transitions. [2023-11-29 06:22:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 06:22:06,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:06,401 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:06,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:22:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:06,602 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:06,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1485928130, now seen corresponding path program 1 times [2023-11-29 06:22:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:06,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346731847] [2023-11-29 06:22:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:06,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,294 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 06:22:07,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:07,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346731847] [2023-11-29 06:22:07,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346731847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:07,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416432965] [2023-11-29 06:22:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:07,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:07,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:07,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:22:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:07,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 06:22:07,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:07,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:22:07,450 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 06:22:07,457 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 06:22:07,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:22:07,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 06:22:07,622 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#memory_$Pointer$#0.base| (store |c_old(#memory_$Pointer$#0.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.base| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#memory_$Pointer$#0.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$#0.offset| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$#0.offset|))) is different from true [2023-11-29 06:22:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:07,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:22:07,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:07,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:22:07,689 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:22:07,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 06:22:07,733 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-29 06:22:07,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-29 06:22:07,749 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-29 06:22:07,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-11-29 06:22:07,889 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 06:22:07,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416432965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:08,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:08,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2023-11-29 06:22:08,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557670401] [2023-11-29 06:22:08,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:08,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:22:08,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:22:08,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=575, Unknown=1, NotChecked=48, Total=702 [2023-11-29 06:22:08,204 INFO L87 Difference]: Start difference. First operand 133 states and 176 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:22:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:08,882 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2023-11-29 06:22:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:22:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-11-29 06:22:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:08,883 INFO L225 Difference]: With dead ends: 137 [2023-11-29 06:22:08,883 INFO L226 Difference]: Without dead ends: 137 [2023-11-29 06:22:08,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=930, Unknown=1, NotChecked=62, Total=1122 [2023-11-29 06:22:08,885 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 11 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:08,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 772 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 669 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2023-11-29 06:22:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-29 06:22:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2023-11-29 06:22:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 93 states have (on average 1.6021505376344085) internal successors, (149), 117 states have internal predecessors, (149), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2023-11-29 06:22:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2023-11-29 06:22:08,890 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 30 [2023-11-29 06:22:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:08,890 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2023-11-29 06:22:08,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-29 06:22:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2023-11-29 06:22:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:22:08,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:08,891 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, 1] [2023-11-29 06:22:08,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:22:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:09,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:09,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 63131556, now seen corresponding path program 2 times [2023-11-29 06:22:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:09,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325144609] [2023-11-29 06:22:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:09,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:09,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:10,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:22:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:22:10,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325144609] [2023-11-29 06:22:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325144609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228350573] [2023-11-29 06:22:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:10,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:10,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:10,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:22:10,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:10,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 06:22:10,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:10,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:22:10,769 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:22:10,787 WARN L854 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse0) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) is different from false [2023-11-29 06:22:14,797 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse0) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) is different from true [2023-11-29 06:22:14,848 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-29 06:22:14,880 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) is different from false [2023-11-29 06:22:18,886 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) is different from true [2023-11-29 06:22:19,070 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)) (= (select |v_#valid_BEFORE_CALL_37| .cse0) 0)))) (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1))) (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse1 1)) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= (select |v_#valid_BEFORE_CALL_37| .cse1) 0))))))) is different from false [2023-11-29 06:22:19,073 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)) (= (select |v_#valid_BEFORE_CALL_37| .cse0) 0)))) (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1))) (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse1 1)) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= (select |v_#valid_BEFORE_CALL_37| .cse1) 0))))))) is different from true [2023-11-29 06:22:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 15 not checked. [2023-11-29 06:22:19,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:19,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228350573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:19,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:19,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2023-11-29 06:22:19,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307502057] [2023-11-29 06:22:19,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:19,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:22:19,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:22:19,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=287, Unknown=8, NotChecked=200, Total=600 [2023-11-29 06:22:19,227 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 24 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 06:22:19,559 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse2))) (let ((.cse14 (store |c_old(#valid)| .cse2 .cse4))) (let ((.cse11 (@diff .cse14 |c_#valid|))) (let ((.cse5 (select |c_#valid| .cse11))) (let ((.cse12 (store .cse14 .cse11 .cse5))) (let ((.cse9 (@diff .cse12 |c_#valid|))) (let ((.cse8 (select |c_#valid| .cse9)) (.cse3 (select (select |c_#memory_$Pointer$#0.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset)) (.cse6 (= (select |c_old(#valid)| .cse11) 0)) (.cse7 (= |c_#valid| .cse14)) (.cse10 (= |c_#valid| .cse12)) (.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse2) 0))) (and (or .cse0 .cse1 (= .cse2 .cse3)) (or .cse0 (= .cse2 |c_create_internal_#t~ret7.base|) .cse1) (or .cse0 .cse1 (= .cse4 1)) (or (= .cse5 1) .cse6 .cse7) (or (= .cse8 1) (= (select |c_old(#valid)| .cse9) 0) .cse10) (or (= .cse11 |c_create_internal_#t~ret7.base|) .cse6 .cse7) (= |c_#valid| (store .cse12 .cse9 .cse8)) (or (= .cse11 c_create_internal_~now~0.base) .cse6 .cse7) (or (= .cse11 .cse3) .cse6 .cse7) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse13 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse13) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse13 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse10 (or .cse0 .cse1 (= c_create_internal_~now~0.base .cse2))))))))))) is different from false [2023-11-29 06:22:19,564 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse2))) (let ((.cse14 (store |c_old(#valid)| .cse2 .cse4))) (let ((.cse11 (@diff .cse14 |c_#valid|))) (let ((.cse5 (select |c_#valid| .cse11))) (let ((.cse12 (store .cse14 .cse11 .cse5))) (let ((.cse9 (@diff .cse12 |c_#valid|))) (let ((.cse8 (select |c_#valid| .cse9)) (.cse3 (select (select |c_#memory_$Pointer$#0.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset)) (.cse6 (= (select |c_old(#valid)| .cse11) 0)) (.cse7 (= |c_#valid| .cse14)) (.cse10 (= |c_#valid| .cse12)) (.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse2) 0))) (and (or .cse0 .cse1 (= .cse2 .cse3)) (or .cse0 (= .cse2 |c_create_internal_#t~ret7.base|) .cse1) (or .cse0 .cse1 (= .cse4 1)) (or (= .cse5 1) .cse6 .cse7) (or (= .cse8 1) (= (select |c_old(#valid)| .cse9) 0) .cse10) (or (= .cse11 |c_create_internal_#t~ret7.base|) .cse6 .cse7) (= |c_#valid| (store .cse12 .cse9 .cse8)) (or (= .cse11 c_create_internal_~now~0.base) .cse6 .cse7) (or (= .cse11 .cse3) .cse6 .cse7) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse13 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse13) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse13 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse10 (or .cse0 .cse1 (= c_create_internal_~now~0.base .cse2))))))))))) is different from true [2023-11-29 06:22:19,571 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse2))) (let ((.cse14 (store |c_old(#valid)| .cse2 .cse4))) (let ((.cse12 (@diff .cse14 |c_#valid|))) (let ((.cse5 (select |c_#valid| .cse12))) (let ((.cse11 (store .cse14 .cse12 .cse5))) (let ((.cse9 (@diff .cse11 |c_#valid|))) (let ((.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse2) 0)) (.cse8 (select |c_#valid| .cse9)) (.cse3 (select (select |c_#memory_$Pointer$#0.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset)) (.cse6 (= (select |c_old(#valid)| .cse12) 0)) (.cse7 (= |c_#valid| .cse14)) (.cse10 (= |c_#valid| .cse11))) (and (or .cse0 .cse1 (= .cse2 .cse3)) (or .cse0 .cse1 (= .cse4 1)) (or (= .cse5 1) .cse6 .cse7) (or (= .cse8 1) (= (select |c_old(#valid)| .cse9) 0) .cse10) (= |c_#valid| (store .cse11 .cse9 .cse8)) (or (= .cse12 .cse3) .cse6 .cse7) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse13 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse13) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse13 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse10))))))))) is different from false [2023-11-29 06:22:19,577 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse2))) (let ((.cse14 (store |c_old(#valid)| .cse2 .cse4))) (let ((.cse12 (@diff .cse14 |c_#valid|))) (let ((.cse5 (select |c_#valid| .cse12))) (let ((.cse11 (store .cse14 .cse12 .cse5))) (let ((.cse9 (@diff .cse11 |c_#valid|))) (let ((.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse2) 0)) (.cse8 (select |c_#valid| .cse9)) (.cse3 (select (select |c_#memory_$Pointer$#0.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset)) (.cse6 (= (select |c_old(#valid)| .cse12) 0)) (.cse7 (= |c_#valid| .cse14)) (.cse10 (= |c_#valid| .cse11))) (and (or .cse0 .cse1 (= .cse2 .cse3)) (or .cse0 .cse1 (= .cse4 1)) (or (= .cse5 1) .cse6 .cse7) (or (= .cse8 1) (= (select |c_old(#valid)| .cse9) 0) .cse10) (= |c_#valid| (store .cse11 .cse9 .cse8)) (or (= .cse12 .cse3) .cse6 .cse7) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse13 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse13) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse13 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse10))))))))) is different from true [2023-11-29 06:22:19,585 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse12 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse2 (select |c_#valid| .cse12))) (let ((.cse13 (store |c_old(#valid)| .cse12 .cse2))) (let ((.cse10 (@diff .cse13 |c_#valid|))) (let ((.cse3 (select |c_#valid| .cse10))) (let ((.cse9 (store .cse13 .cse10 .cse3))) (let ((.cse7 (@diff .cse9 |c_#valid|))) (let ((.cse6 (select |c_#valid| .cse7)) (.cse4 (= (select |c_old(#valid)| .cse10) 0)) (.cse5 (= |c_#valid| .cse13)) (.cse8 (= |c_#valid| .cse9)) (.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse12) 0))) (and (or .cse0 .cse1 (= .cse2 1)) (or (= .cse3 1) .cse4 .cse5) (or (= .cse6 1) (= (select |c_old(#valid)| .cse7) 0) .cse8) (= |c_#valid| (store .cse9 .cse7 .cse6)) (or (= .cse10 c_create_internal_~now~0.base) .cse4 .cse5) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse11 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse11) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse11 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse8 (or .cse0 .cse1 (= c_create_internal_~now~0.base .cse12))))))))))) is different from false [2023-11-29 06:22:19,591 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse12 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse2 (select |c_#valid| .cse12))) (let ((.cse13 (store |c_old(#valid)| .cse12 .cse2))) (let ((.cse10 (@diff .cse13 |c_#valid|))) (let ((.cse3 (select |c_#valid| .cse10))) (let ((.cse9 (store .cse13 .cse10 .cse3))) (let ((.cse7 (@diff .cse9 |c_#valid|))) (let ((.cse6 (select |c_#valid| .cse7)) (.cse4 (= (select |c_old(#valid)| .cse10) 0)) (.cse5 (= |c_#valid| .cse13)) (.cse8 (= |c_#valid| .cse9)) (.cse0 (= |c_#valid| |c_old(#valid)|)) (.cse1 (= (select |c_old(#valid)| .cse12) 0))) (and (or .cse0 .cse1 (= .cse2 1)) (or (= .cse3 1) .cse4 .cse5) (or (= .cse6 1) (= (select |c_old(#valid)| .cse7) 0) .cse8) (= |c_#valid| (store .cse9 .cse7 .cse6)) (or (= .cse10 c_create_internal_~now~0.base) .cse4 .cse5) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse11 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse11) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse11 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) .cse8 (or .cse0 .cse1 (= c_create_internal_~now~0.base .cse12))))))))))) is different from true [2023-11-29 06:22:19,598 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse1 (store |c_old(#valid)| .cse3 (select |c_#valid| .cse3)))) (let ((.cse0 (@diff .cse1 |c_#valid|))) (and (or (= .cse0 c_create_internal_~now~0.base) (= (select |c_old(#valid)| .cse0) 0) (= |c_#valid| .cse1)) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse2 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse2) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse2 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (= |c_#valid| (store .cse1 .cse0 (select |c_#valid| .cse0))) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse3) 0) (= c_create_internal_~now~0.base .cse3)))))) is different from false [2023-11-29 06:22:19,602 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse3 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse1 (store |c_old(#valid)| .cse3 (select |c_#valid| .cse3)))) (let ((.cse0 (@diff .cse1 |c_#valid|))) (and (or (= .cse0 c_create_internal_~now~0.base) (= (select |c_old(#valid)| .cse0) 0) (= |c_#valid| .cse1)) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse2 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| .cse2) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse2 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (= |c_#valid| (store .cse1 .cse0 (select |c_#valid| .cse0))) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse3) 0) (= c_create_internal_~now~0.base .cse3)))))) is different from true [2023-11-29 06:22:19,682 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse6 (select |c_#valid| .cse5))) (let ((.cse9 (store |c_old(#valid)| .cse5 .cse6))) (let ((.cse8 (@diff .cse9 |c_#valid|))) (let ((.cse7 (select |c_#valid| .cse8))) (let ((.cse4 (store .cse9 .cse8 .cse7))) (let ((.cse3 (@diff .cse4 |c_#valid|))) (let ((.cse2 (select |c_#valid| .cse3))) (and (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) (or (= .cse2 1) (= (select |c_old(#valid)| .cse3) 0) (= .cse3 c_create_internal_~now~0.base) (= |c_#valid| .cse4)) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse5) 0) (= .cse6 1) (= c_create_internal_~now~0.base .cse5)) (= |c_#valid| (store .cse4 .cse3 .cse2)) (or (= .cse7 1) (= .cse8 c_create_internal_~now~0.base) (= (select |c_old(#valid)| .cse8) 0) (= |c_#valid| .cse9))))))))))) is different from false [2023-11-29 06:22:20,081 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse6 (select |c_#valid| .cse5))) (let ((.cse9 (store |c_old(#valid)| .cse5 .cse6))) (let ((.cse8 (@diff .cse9 |c_#valid|))) (let ((.cse7 (select |c_#valid| .cse8))) (let ((.cse4 (store .cse9 .cse8 .cse7))) (let ((.cse3 (@diff .cse4 |c_#valid|))) (let ((.cse2 (select |c_#valid| .cse3))) (and (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) (or (= .cse2 1) (= (select |c_old(#valid)| .cse3) 0) (= .cse3 c_create_internal_~now~0.base) (= |c_#valid| .cse4)) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse5) 0) (= .cse6 1) (= c_create_internal_~now~0.base .cse5)) (= |c_#valid| (store .cse4 .cse3 .cse2)) (or (= .cse7 1) (= .cse8 c_create_internal_~now~0.base) (= (select |c_old(#valid)| .cse8) 0) (= |c_#valid| .cse9))))))))))) is different from true [2023-11-29 06:22:20,093 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse3 (select |c_#valid| .cse2))) (let ((.cse6 (store |c_old(#valid)| .cse2 .cse3))) (let ((.cse5 (@diff .cse6 |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse5))) (let ((.cse9 (store .cse6 .cse5 .cse4))) (let ((.cse8 (@diff .cse9 |c_#valid|))) (let ((.cse7 (select |c_#valid| .cse8))) (and (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse2) 0) (= .cse3 1)) (or (= .cse4 1) (= (select |c_old(#valid)| .cse5) 0) (= |c_#valid| .cse6)) (or (= .cse7 1) (= (select |c_old(#valid)| .cse8) 0) (= |c_#valid| .cse9)) (= |c_#valid| (store .cse9 .cse8 .cse7))))))))))) is different from false [2023-11-29 06:22:20,099 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (@diff |c_old(#valid)| |c_#valid|))) (let ((.cse3 (select |c_#valid| .cse2))) (let ((.cse6 (store |c_old(#valid)| .cse2 .cse3))) (let ((.cse5 (@diff .cse6 |c_#valid|))) (let ((.cse4 (select |c_#valid| .cse5))) (let ((.cse9 (store .cse6 .cse5 .cse4))) (let ((.cse8 (@diff .cse9 |c_#valid|))) (let ((.cse7 (select |c_#valid| .cse8))) (and (or (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse0) 0) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse0 1)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |c_old(#valid)| |v_#valid_BEFORE_CALL_34|))) (and (= (select |c_old(#valid)| .cse1) 0) (= |v_#valid_BEFORE_CALL_34| (store |c_old(#valid)| .cse1 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)))))) (or (= |c_#valid| |c_old(#valid)|) (= (select |c_old(#valid)| .cse2) 0) (= .cse3 1)) (or (= .cse4 1) (= (select |c_old(#valid)| .cse5) 0) (= |c_#valid| .cse6)) (or (= .cse7 1) (= (select |c_old(#valid)| .cse8) 0) (= |c_#valid| .cse9)) (= |c_#valid| (store .cse9 .cse8 .cse7))))))))))) is different from true [2023-11-29 06:22:20,109 WARN L854 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (or (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)) (= (select |v_#valid_BEFORE_CALL_37| .cse0) 0)))) (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1))) (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse1 1)) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= (select |v_#valid_BEFORE_CALL_37| .cse1) 0)))))))) is different from false [2023-11-29 06:22:20,112 WARN L876 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (or (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (exists ((alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse0 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base 1)) (= (select |v_#valid_BEFORE_CALL_37| .cse0) 0)))) (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1))) (exists ((|v_#valid_BEFORE_CALL_37| (Array Int Int))) (and (= (select |v_#valid_BEFORE_CALL_37| |c_ULTIMATE.start_create_~now~1#1.base|) 1) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_55 Int) (|v_#valid_BEFORE_CALL_34| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_37| |v_#valid_BEFORE_CALL_34|))) (and (= |v_#valid_BEFORE_CALL_34| (store |v_#valid_BEFORE_CALL_37| .cse1 1)) (not (= v_alloc_and_zero_internal_~pi~1.base_55 alloc_and_zero_internal_~pi~1.base)) (= |c_#valid| (store (store |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base)) v_alloc_and_zero_internal_~pi~1.base_55 1)) (= (select |v_#valid_BEFORE_CALL_34| alloc_and_zero_internal_~pi~1.base) 0) (= (select |v_#valid_BEFORE_CALL_37| .cse1) 0)))))))) is different from true [2023-11-29 06:22:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:20,257 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2023-11-29 06:22:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:22:20,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 34 [2023-11-29 06:22:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:20,258 INFO L225 Difference]: With dead ends: 153 [2023-11-29 06:22:20,258 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 06:22:20,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=155, Invalid=377, Unknown=22, NotChecked=636, Total=1190 [2023-11-29 06:22:20,260 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 22 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 913 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:20,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 352 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 435 Invalid, 0 Unknown, 913 Unchecked, 0.4s Time] [2023-11-29 06:22:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 06:22:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2023-11-29 06:22:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.5858585858585859) internal successors, (157), 123 states have internal predecessors, (157), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 17 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 193 transitions. [2023-11-29 06:22:20,265 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 193 transitions. Word has length 34 [2023-11-29 06:22:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:20,265 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 193 transitions. [2023-11-29 06:22:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 06:22:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 193 transitions. [2023-11-29 06:22:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:22:20,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:20,266 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, 1] [2023-11-29 06:22:20,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:22:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:20,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:20,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash 63131557, now seen corresponding path program 2 times [2023-11-29 06:22:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:20,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743733838] [2023-11-29 06:22:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:20,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:21,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 06:22:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:22:22,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743733838] [2023-11-29 06:22:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743733838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549428823] [2023-11-29 06:22:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:22:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:22,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:22:22,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:22:22,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:22,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 06:22:22,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:22,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:22:22,905 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:22:23,134 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-29 06:22:23,572 INFO L349 Elim1Store]: treesize reduction 160, result has 14.4 percent of original size [2023-11-29 06:22:23,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 124 [2023-11-29 06:22:23,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:23,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 189 [2023-11-29 06:22:25,429 INFO L349 Elim1Store]: treesize reduction 170, result has 2.9 percent of original size [2023-11-29 06:22:25,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 21 [2023-11-29 06:22:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2023-11-29 06:22:25,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549428823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:25,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-11-29 06:22:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357950135] [2023-11-29 06:22:25,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:25,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:22:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:22:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=981, Unknown=2, NotChecked=130, Total=1260 [2023-11-29 06:22:25,808 INFO L87 Difference]: Start difference. First operand 144 states and 193 transitions. Second operand has 34 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (10), 3 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 06:22:30,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:22:35,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:22:39,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:22:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:39,374 INFO L93 Difference]: Finished difference Result 161 states and 216 transitions. [2023-11-29 06:22:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:22:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (10), 3 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 34 [2023-11-29 06:22:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:39,375 INFO L225 Difference]: With dead ends: 161 [2023-11-29 06:22:39,376 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 06:22:39,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1290, Unknown=2, NotChecked=150, Total=1640 [2023-11-29 06:22:39,377 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 50 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:39,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 462 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 666 Invalid, 3 Unknown, 272 Unchecked, 13.0s Time] [2023-11-29 06:22:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 06:22:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2023-11-29 06:22:39,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 100 states have (on average 1.6) internal successors, (160), 124 states have internal predecessors, (160), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 17 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 196 transitions. [2023-11-29 06:22:39,381 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 196 transitions. Word has length 34 [2023-11-29 06:22:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:39,382 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 196 transitions. [2023-11-29 06:22:39,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 9 states have call successors, (10), 3 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-11-29 06:22:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 196 transitions. [2023-11-29 06:22:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:22:39,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:39,382 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:39,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:22:39,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:39,583 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:39,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1000905399, now seen corresponding path program 1 times [2023-11-29 06:22:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438508425] [2023-11-29 06:22:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:40,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438508425] [2023-11-29 06:22:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438508425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038876403] [2023-11-29 06:22:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:40,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:40,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:22:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:40,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 06:22:40,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:40,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:22:40,903 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 21 treesize of output 9 [2023-11-29 06:22:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:22:40,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:40,925 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 34 treesize of output 28 [2023-11-29 06:22:41,072 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:22:41,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-29 06:22:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:22:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038876403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:41,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:41,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 27 [2023-11-29 06:22:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495802232] [2023-11-29 06:22:41,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:22:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:22:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:22:41,095 INFO L87 Difference]: Start difference. First operand 145 states and 196 transitions. Second operand has 28 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 06:22:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:42,505 INFO L93 Difference]: Finished difference Result 167 states and 215 transitions. [2023-11-29 06:22:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:22:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2023-11-29 06:22:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:42,506 INFO L225 Difference]: With dead ends: 167 [2023-11-29 06:22:42,506 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 06:22:42,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:22:42,508 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 52 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:42,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1161 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:22:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 06:22:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2023-11-29 06:22:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 108 states have (on average 1.5740740740740742) internal successors, (170), 131 states have internal predecessors, (170), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2023-11-29 06:22:42,514 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 33 [2023-11-29 06:22:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:42,514 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2023-11-29 06:22:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 06:22:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2023-11-29 06:22:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:22:42,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:42,514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:42,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:22:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:42,715 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:42,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1000905398, now seen corresponding path program 1 times [2023-11-29 06:22:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:42,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536334477] [2023-11-29 06:22:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:42,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:43,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:43,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536334477] [2023-11-29 06:22:43,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536334477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:43,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99194702] [2023-11-29 06:22:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:43,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:43,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:43,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:22:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:43,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 06:22:43,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:43,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:22:43,878 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 06:22:44,000 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 21 treesize of output 9 [2023-11-29 06:22:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:44,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:44,221 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 30 treesize of output 24 [2023-11-29 06:22:44,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:44,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:44,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:22:44,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 06:22:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99194702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:44,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 35 [2023-11-29 06:22:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998460112] [2023-11-29 06:22:44,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 06:22:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 06:22:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:22:44,583 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 36 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 29 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 06:22:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:46,107 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2023-11-29 06:22:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:22:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 29 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2023-11-29 06:22:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:46,109 INFO L225 Difference]: With dead ends: 163 [2023-11-29 06:22:46,109 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 06:22:46,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:22:46,111 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 74 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:46,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 990 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:22:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 06:22:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2023-11-29 06:22:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 109 states have (on average 1.5688073394495412) internal successors, (171), 132 states have internal predecessors, (171), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 207 transitions. [2023-11-29 06:22:46,117 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 207 transitions. Word has length 33 [2023-11-29 06:22:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:46,117 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 207 transitions. [2023-11-29 06:22:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 29 states have internal predecessors, (62), 6 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-29 06:22:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 207 transitions. [2023-11-29 06:22:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 06:22:46,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:46,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:46,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:22:46,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:22:46,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:46,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2047760161, now seen corresponding path program 1 times [2023-11-29 06:22:46,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:46,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033547990] [2023-11-29 06:22:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,417 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 06:22:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033547990] [2023-11-29 06:22:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033547990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:46,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:46,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:22:46,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445132538] [2023-11-29 06:22:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:46,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:22:46,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:22:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:22:46,419 INFO L87 Difference]: Start difference. First operand 154 states and 207 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:22:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:46,725 INFO L93 Difference]: Finished difference Result 212 states and 264 transitions. [2023-11-29 06:22:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:22:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-11-29 06:22:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:46,727 INFO L225 Difference]: With dead ends: 212 [2023-11-29 06:22:46,727 INFO L226 Difference]: Without dead ends: 212 [2023-11-29 06:22:46,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:22:46,728 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:46,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 236 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:22:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-29 06:22:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2023-11-29 06:22:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.5934959349593496) internal successors, (196), 145 states have internal predecessors, (196), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 232 transitions. [2023-11-29 06:22:46,739 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 232 transitions. Word has length 32 [2023-11-29 06:22:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:46,739 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 232 transitions. [2023-11-29 06:22:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:22:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 232 transitions. [2023-11-29 06:22:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 06:22:46,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:46,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:46,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 06:22:46,740 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:46,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:46,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2047760162, now seen corresponding path program 1 times [2023-11-29 06:22:46,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:46,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635174899] [2023-11-29 06:22:46,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:46,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:46,940 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 06:22:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635174899] [2023-11-29 06:22:46,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635174899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:46,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387155649] [2023-11-29 06:22:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:46,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:46,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:46,942 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:46,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:22:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:47,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:22:47,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:47,312 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 06:22:47,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:22:47,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387155649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:47,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:22:47,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-29 06:22:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007207984] [2023-11-29 06:22:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:47,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:22:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:22:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:22:47,314 INFO L87 Difference]: Start difference. First operand 167 states and 232 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:22:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:47,728 INFO L93 Difference]: Finished difference Result 242 states and 312 transitions. [2023-11-29 06:22:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:22:47,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-29 06:22:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:47,730 INFO L225 Difference]: With dead ends: 242 [2023-11-29 06:22:47,730 INFO L226 Difference]: Without dead ends: 242 [2023-11-29 06:22:47,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:22:47,731 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 93 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:47,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 339 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:22:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-29 06:22:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2023-11-29 06:22:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 133 states have (on average 1.6090225563909775) internal successors, (214), 155 states have internal predecessors, (214), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 250 transitions. [2023-11-29 06:22:47,738 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 250 transitions. Word has length 32 [2023-11-29 06:22:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:47,739 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 250 transitions. [2023-11-29 06:22:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 06:22:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 250 transitions. [2023-11-29 06:22:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 06:22:47,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:47,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:47,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:22:47,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:22:47,940 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -943945021, now seen corresponding path program 1 times [2023-11-29 06:22:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941090216] [2023-11-29 06:22:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,100 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 06:22:48,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941090216] [2023-11-29 06:22:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941090216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:48,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:48,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 06:22:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155752160] [2023-11-29 06:22:48,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:48,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:22:48,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:48,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:22:48,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:22:48,102 INFO L87 Difference]: Start difference. First operand 177 states and 250 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:22:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:48,415 INFO L93 Difference]: Finished difference Result 204 states and 280 transitions. [2023-11-29 06:22:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:22:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2023-11-29 06:22:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:48,417 INFO L225 Difference]: With dead ends: 204 [2023-11-29 06:22:48,417 INFO L226 Difference]: Without dead ends: 204 [2023-11-29 06:22:48,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:22:48,418 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 92 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:48,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 383 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:22:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-29 06:22:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 178. [2023-11-29 06:22:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 134 states have (on average 1.5895522388059702) internal successors, (213), 156 states have internal predecessors, (213), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 249 transitions. [2023-11-29 06:22:48,426 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 249 transitions. Word has length 33 [2023-11-29 06:22:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:48,426 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 249 transitions. [2023-11-29 06:22:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 06:22:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 249 transitions. [2023-11-29 06:22:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 06:22:48,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:48,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:48,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 06:22:48,427 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:48,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2000287545, now seen corresponding path program 1 times [2023-11-29 06:22:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:48,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930718251] [2023-11-29 06:22:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:48,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 06:22:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 06:22:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:22:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930718251] [2023-11-29 06:22:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930718251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:48,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:48,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:22:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571574248] [2023-11-29 06:22:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:22:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:48,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:22:48,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:22:48,856 INFO L87 Difference]: Start difference. First operand 178 states and 249 transitions. Second operand has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:22:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:49,401 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2023-11-29 06:22:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:22:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2023-11-29 06:22:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:49,403 INFO L225 Difference]: With dead ends: 182 [2023-11-29 06:22:49,403 INFO L226 Difference]: Without dead ends: 182 [2023-11-29 06:22:49,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:22:49,404 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 333 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 06:22:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-29 06:22:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2023-11-29 06:22:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 137 states have (on average 1.5985401459854014) internal successors, (219), 156 states have internal predecessors, (219), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 21 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 255 transitions. [2023-11-29 06:22:49,411 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 255 transitions. Word has length 38 [2023-11-29 06:22:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:49,411 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 255 transitions. [2023-11-29 06:22:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:22:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 255 transitions. [2023-11-29 06:22:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 06:22:49,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:49,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 06:22:49,412 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:49,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2000287544, now seen corresponding path program 1 times [2023-11-29 06:22:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:49,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373961513] [2023-11-29 06:22:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:49,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 06:22:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 06:22:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:22:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373961513] [2023-11-29 06:22:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373961513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:49,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:49,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 06:22:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301861706] [2023-11-29 06:22:49,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:22:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:22:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:22:49,861 INFO L87 Difference]: Start difference. First operand 181 states and 255 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:22:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:50,344 INFO L93 Difference]: Finished difference Result 181 states and 252 transitions. [2023-11-29 06:22:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:22:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2023-11-29 06:22:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:50,346 INFO L225 Difference]: With dead ends: 181 [2023-11-29 06:22:50,346 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 06:22:50,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:22:50,347 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:50,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 344 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:22:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 06:22:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-29 06:22:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 137 states have (on average 1.5766423357664234) internal successors, (216), 156 states have internal predecessors, (216), 12 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (24), 21 states have call predecessors, (24), 12 states have call successors, (24) [2023-11-29 06:22:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 252 transitions. [2023-11-29 06:22:50,352 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 252 transitions. Word has length 38 [2023-11-29 06:22:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:50,352 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 252 transitions. [2023-11-29 06:22:50,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 06:22:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 252 transitions. [2023-11-29 06:22:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 06:22:50,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:50,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 06:22:50,353 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-29 06:22:50,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 202708328, now seen corresponding path program 1 times [2023-11-29 06:22:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987056770] [2023-11-29 06:22:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:50,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 06:22:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:51,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-29 06:22:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:51,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 06:22:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:51,331 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 06:22:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987056770] [2023-11-29 06:22:51,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987056770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938881180] [2023-11-29 06:22:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:51,333 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:51,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2676c92e-62b6-41cf-8498-58d647beb23a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:22:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:51,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 117 conjunts are in the unsatisfiable core [2023-11-29 06:22:51,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:51,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 06:22:51,783 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 06:22:51,791 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 06:22:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:52,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:22:52,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:52,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 06:22:52,353 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-29 06:22:52,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 06:22:52,371 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:22:52,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 06:22:52,975 INFO L349 Elim1Store]: treesize reduction 251, result has 33.8 percent of original size [2023-11-29 06:22:52,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 88 treesize of output 231 [2023-11-29 06:22:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:22:53,588 INFO L349 Elim1Store]: treesize reduction 30, result has 42.3 percent of original size [2023-11-29 06:22:53,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 40 [2023-11-29 06:22:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:22:53,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:22:53,676 INFO L349 Elim1Store]: treesize reduction 73, result has 29.1 percent of original size [2023-11-29 06:22:53,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 51 [2023-11-29 06:22:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:22:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:22:53,810 INFO L349 Elim1Store]: treesize reduction 70, result has 30.0 percent of original size [2023-11-29 06:22:53,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 51 [2023-11-29 06:22:54,360 INFO L349 Elim1Store]: treesize reduction 304, result has 12.4 percent of original size [2023-11-29 06:22:54,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 520 treesize of output 372 [2023-11-29 06:22:54,417 INFO L349 Elim1Store]: treesize reduction 97, result has 14.9 percent of original size [2023-11-29 06:22:54,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 511 treesize of output 529 [2023-11-29 06:30:40,637 WARN L293 SmtUtils]: Spent 7.62m on a formula simplification. DAG size of input: 4518 DAG size of output: 3678 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 06:30:40,640 INFO L349 Elim1Store]: treesize reduction 5126, result has 67.2 percent of original size [2023-11-29 06:30:40,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 51 select indices, 51 select index equivalence classes, 0 disjoint index pairs (out of 1275 index pairs), introduced 66 new quantified variables, introduced 1275 case distinctions, treesize of input 2564 treesize of output 11609 [2023-11-29 06:30:59,198 INFO L224 Elim1Store]: Index analysis took 12801 ms [2023-11-29 06:35:36,186 WARN L293 SmtUtils]: Spent 4.46m on a formula simplification. DAG size of input: 2868 DAG size of output: 2380 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-29 06:35:36,188 INFO L349 Elim1Store]: treesize reduction 3014, result has 68.0 percent of original size [2023-11-29 06:35:36,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 40 new quantified variables, introduced 780 case distinctions, treesize of input 1082 treesize of output 7300