./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:56:43,227 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:56:43,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:56:43,366 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:56:43,367 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:56:43,401 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:56:43,402 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:56:43,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:56:43,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:56:43,405 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:56:43,406 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:56:43,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:56:43,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:56:43,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:56:43,409 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:56:43,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:56:43,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:56:43,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:56:43,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:56:43,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:56:43,414 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:56:43,418 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:56:43,419 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:56:43,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:56:43,420 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:56:43,420 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:56:43,421 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:56:43,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:56:43,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:56:43,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:56:43,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:56:43,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:56:43,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:43,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:56:43,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:56:43,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:56:43,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:56:43,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:56:43,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:56:43,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:56:43,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:56:43,428 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_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b19ed65fc9d9f8e19f4d644b05d37e3da28cb107a90eedb15c652c094a7f23f1 [2023-11-24 21:56:43,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:56:43,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:56:43,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:56:43,877 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:56:43,878 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:56:43,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-24 21:56:47,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:56:47,795 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:56:47,795 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2023-11-24 21:56:47,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/data/a398debb7/f526a3c5f4c049dcaea38b07a37f64e0/FLAG3a41b5b28 [2023-11-24 21:56:47,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/data/a398debb7/f526a3c5f4c049dcaea38b07a37f64e0 [2023-11-24 21:56:47,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:56:47,833 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:56:47,835 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:47,835 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:56:47,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:56:47,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:47" (1/1) ... [2023-11-24 21:56:47,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252c485e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:47, skipping insertion in model container [2023-11-24 21:56:47,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:56:47" (1/1) ... [2023-11-24 21:56:47,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:56:48,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:48,322 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:56:48,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:56:48,431 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:56:48,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48 WrapperNode [2023-11-24 21:56:48,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:56:48,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:48,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:56:48,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:56:48,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,484 INFO L138 Inliner]: procedures = 123, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 64 [2023-11-24 21:56:48,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:56:48,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:56:48,486 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:56:48,486 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:56:48,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,532 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2023-11-24 21:56:48,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:56:48,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:56:48,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:56:48,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:56:48,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (1/1) ... [2023-11-24 21:56:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:56:48,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:48,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:56:48,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:56:48,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:56:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:56:48,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:56:48,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:56:48,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:56:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:56:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:56:48,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:56:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:56:48,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:56:48,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:56:48,762 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:56:48,765 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:56:49,117 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:56:49,164 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:56:49,164 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:56:49,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:49 BoogieIcfgContainer [2023-11-24 21:56:49,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:56:49,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:56:49,167 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:56:49,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:56:49,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:56:47" (1/3) ... [2023-11-24 21:56:49,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f003d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:49, skipping insertion in model container [2023-11-24 21:56:49,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:56:48" (2/3) ... [2023-11-24 21:56:49,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f003d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:56:49, skipping insertion in model container [2023-11-24 21:56:49,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:56:49" (3/3) ... [2023-11-24 21:56:49,173 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2023-11-24 21:56:49,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:56:49,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-24 21:56:49,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:56:49,240 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;@6c20cdf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:56:49,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-11-24 21:56:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 25 states have (on average 2.32) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 21:56:49,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:49,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 21:56:49,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:49,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash 3817, now seen corresponding path program 1 times [2023-11-24 21:56:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991950779] [2023-11-24 21:56:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:49,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991950779] [2023-11-24 21:56:49,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991950779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:49,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:49,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053249075] [2023-11-24 21:56:49,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:49,573 INFO L87 Difference]: Start difference. First operand has 53 states, 25 states have (on average 2.32) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:49,710 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2023-11-24 21:56:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 21:56:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:49,723 INFO L225 Difference]: With dead ends: 55 [2023-11-24 21:56:49,723 INFO L226 Difference]: Without dead ends: 54 [2023-11-24 21:56:49,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:49,731 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:49,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-24 21:56:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-11-24 21:56:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-11-24 21:56:49,773 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 2 [2023-11-24 21:56:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:49,774 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-11-24 21:56:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-11-24 21:56:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 21:56:49,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:49,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 21:56:49,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:56:49,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:49,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash 3818, now seen corresponding path program 1 times [2023-11-24 21:56:49,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:49,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495225466] [2023-11-24 21:56:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:49,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495225466] [2023-11-24 21:56:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495225466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:49,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:49,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251289194] [2023-11-24 21:56:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:49,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:49,876 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:49,955 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-11-24 21:56:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 21:56:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:49,957 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:56:49,957 INFO L226 Difference]: Without dead ends: 50 [2023-11-24 21:56:49,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:49,959 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:49,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 43 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-24 21:56:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2023-11-24 21:56:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-11-24 21:56:49,967 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 2 [2023-11-24 21:56:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:49,967 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-11-24 21:56:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-11-24 21:56:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:56:49,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:49,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:56:49,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:49,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1755113050, now seen corresponding path program 1 times [2023-11-24 21:56:49,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:49,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225506304] [2023-11-24 21:56:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:49,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225506304] [2023-11-24 21:56:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225506304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:50,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:50,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:50,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848452691] [2023-11-24 21:56:50,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:50,135 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:50,273 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2023-11-24 21:56:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:56:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:50,279 INFO L225 Difference]: With dead ends: 52 [2023-11-24 21:56:50,282 INFO L226 Difference]: Without dead ends: 52 [2023-11-24 21:56:50,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:56:50,285 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:50,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-24 21:56:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2023-11-24 21:56:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-24 21:56:50,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2023-11-24 21:56:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:50,302 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-24 21:56:50,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-24 21:56:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:56:50,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:50,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:56:50,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:50,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1755113049, now seen corresponding path program 1 times [2023-11-24 21:56:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406121863] [2023-11-24 21:56:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406121863] [2023-11-24 21:56:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406121863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:50,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:50,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905809832] [2023-11-24 21:56:50,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:50,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:50,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:50,552 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:50,694 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2023-11-24 21:56:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:56:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:50,696 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:56:50,696 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:56:50,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:56:50,698 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:50,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:56:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2023-11-24 21:56:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.608695652173913) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2023-11-24 21:56:50,706 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 8 [2023-11-24 21:56:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:50,707 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2023-11-24 21:56:50,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2023-11-24 21:56:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:56:50,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:50,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:56:50,709 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:50,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1426069394, now seen corresponding path program 1 times [2023-11-24 21:56:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36006337] [2023-11-24 21:56:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36006337] [2023-11-24 21:56:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36006337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:50,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155174251] [2023-11-24 21:56:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:50,796 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:50,896 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-11-24 21:56:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 21:56:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:50,897 INFO L225 Difference]: With dead ends: 83 [2023-11-24 21:56:50,898 INFO L226 Difference]: Without dead ends: 83 [2023-11-24 21:56:50,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:56:50,899 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 49 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-24 21:56:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2023-11-24 21:56:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.565217391304348) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-11-24 21:56:50,912 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2023-11-24 21:56:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:50,912 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-11-24 21:56:50,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-11-24 21:56:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:56:50,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:50,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:50,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:56:50,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:50,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1259464461, now seen corresponding path program 1 times [2023-11-24 21:56:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:50,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218756918] [2023-11-24 21:56:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:51,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:51,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218756918] [2023-11-24 21:56:51,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218756918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:51,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:51,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:56:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153768392] [2023-11-24 21:56:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:51,136 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:51,194 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-11-24 21:56:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:56:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:51,199 INFO L225 Difference]: With dead ends: 59 [2023-11-24 21:56:51,199 INFO L226 Difference]: Without dead ends: 59 [2023-11-24 21:56:51,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:51,220 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:51,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-24 21:56:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-24 21:56:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-11-24 21:56:51,228 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 10 [2023-11-24 21:56:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:51,228 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-11-24 21:56:51,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-11-24 21:56:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:56:51,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:51,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:51,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:56:51,231 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:51,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1719329260, now seen corresponding path program 1 times [2023-11-24 21:56:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877364029] [2023-11-24 21:56:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:51,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877364029] [2023-11-24 21:56:51,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877364029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:51,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:51,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:56:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259286982] [2023-11-24 21:56:51,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:51,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:56:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:56:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:51,551 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:51,746 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-11-24 21:56:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:56:51,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:56:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:51,747 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:56:51,747 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:56:51,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:56:51,749 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:51,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 84 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:56:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2023-11-24 21:56:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-11-24 21:56:51,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2023-11-24 21:56:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:51,755 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-11-24 21:56:51,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-11-24 21:56:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:56:51,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:51,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:51,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:56:51,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1719318275, now seen corresponding path program 1 times [2023-11-24 21:56:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:51,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315874345] [2023-11-24 21:56:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315874345] [2023-11-24 21:56:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315874345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:51,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:51,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815074146] [2023-11-24 21:56:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:56:51,840 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:51,931 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-11-24 21:56:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:56:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:51,932 INFO L225 Difference]: With dead ends: 70 [2023-11-24 21:56:51,932 INFO L226 Difference]: Without dead ends: 70 [2023-11-24 21:56:51,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:56:51,934 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:51,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-24 21:56:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2023-11-24 21:56:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.56) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-11-24 21:56:51,941 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 12 [2023-11-24 21:56:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:51,941 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-11-24 21:56:51,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-11-24 21:56:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:56:51,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:51,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:51,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:56:51,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1569351894, now seen corresponding path program 1 times [2023-11-24 21:56:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:51,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110645265] [2023-11-24 21:56:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110645265] [2023-11-24 21:56:52,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110645265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352645491] [2023-11-24 21:56:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:52,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:52,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:52,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:52,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:56:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:52,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 21:56:52,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:52,482 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 [2023-11-24 21:56:52,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:56:52,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:56:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:56:52,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:52,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-24 21:56:52,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-24 21:56:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:52,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:53,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:56:53,223 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:56:53,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-24 21:56:53,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-24 21:56:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:53,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352645491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:53,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:56:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-11-24 21:56:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697031066] [2023-11-24 21:56:53,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:56:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:56:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:56:53,268 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:53,709 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2023-11-24 21:56:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:56:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 21:56:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:53,712 INFO L225 Difference]: With dead ends: 77 [2023-11-24 21:56:53,712 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:56:53,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:56:53,713 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:53,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 124 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:56:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:56:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2023-11-24 21:56:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-11-24 21:56:53,719 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 15 [2023-11-24 21:56:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:53,720 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-11-24 21:56:53,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-11-24 21:56:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:56:53,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:53,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:53,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:56:53,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:53,927 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1481435705, now seen corresponding path program 1 times [2023-11-24 21:56:53,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:53,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448977225] [2023-11-24 21:56:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:54,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448977225] [2023-11-24 21:56:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448977225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:56:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130898041] [2023-11-24 21:56:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:56:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:56:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:56:54,056 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:54,155 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-11-24 21:56:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:56:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 21:56:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:54,157 INFO L225 Difference]: With dead ends: 82 [2023-11-24 21:56:54,157 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 21:56:54,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:54,158 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:54,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 42 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 21:56:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2023-11-24 21:56:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 68 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2023-11-24 21:56:54,163 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 15 [2023-11-24 21:56:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:54,164 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2023-11-24 21:56:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2023-11-24 21:56:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:56:54,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:54,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:56:54,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:54,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1405267554, now seen corresponding path program 1 times [2023-11-24 21:56:54,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:54,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021724147] [2023-11-24 21:56:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:54,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:54,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:54,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021724147] [2023-11-24 21:56:54,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021724147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:54,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333874027] [2023-11-24 21:56:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:54,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:54,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:54,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:54,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:56:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:54,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:56:54,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:54,408 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 13 treesize of output 9 [2023-11-24 21:56:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:54,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333874027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:54,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:56:54,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-24 21:56:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299924746] [2023-11-24 21:56:54,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:56:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:56:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:54,469 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:54,575 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-11-24 21:56:54,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:56:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:56:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:54,576 INFO L225 Difference]: With dead ends: 71 [2023-11-24 21:56:54,576 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 21:56:54,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:56:54,577 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:54,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 21:56:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-24 21:56:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-11-24 21:56:54,581 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 16 [2023-11-24 21:56:54,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:54,581 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-11-24 21:56:54,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:54,582 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-11-24 21:56:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:56:54,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:54,583 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:54,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:54,789 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:54,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -885388748, now seen corresponding path program 1 times [2023-11-24 21:56:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:54,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833682026] [2023-11-24 21:56:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833682026] [2023-11-24 21:56:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833682026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:55,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:55,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:56:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232189743] [2023-11-24 21:56:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:56:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:56:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:55,146 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:55,319 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-24 21:56:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:56:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 21:56:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:55,321 INFO L225 Difference]: With dead ends: 78 [2023-11-24 21:56:55,321 INFO L226 Difference]: Without dead ends: 78 [2023-11-24 21:56:55,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:56:55,322 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:55,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 103 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-24 21:56:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2023-11-24 21:56:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-11-24 21:56:55,325 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 19 [2023-11-24 21:56:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:55,325 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-11-24 21:56:55,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-11-24 21:56:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:56:55,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:55,326 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:56:55,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:55,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1677247311, now seen corresponding path program 1 times [2023-11-24 21:56:55,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:55,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573434788] [2023-11-24 21:56:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:55,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:55,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573434788] [2023-11-24 21:56:55,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573434788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:55,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:55,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:56:55,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247662262] [2023-11-24 21:56:55,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:55,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:56:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:56:55,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:55,638 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:55,834 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-11-24 21:56:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:56:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:56:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:55,836 INFO L225 Difference]: With dead ends: 77 [2023-11-24 21:56:55,836 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:56:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:56:55,837 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:55,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 70 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:56:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2023-11-24 21:56:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-11-24 21:56:55,840 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 20 [2023-11-24 21:56:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:55,840 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-11-24 21:56:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-11-24 21:56:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:56:55,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:55,842 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] [2023-11-24 21:56:55,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:56:55,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:55,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash -455058986, now seen corresponding path program 1 times [2023-11-24 21:56:55,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:55,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729248001] [2023-11-24 21:56:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:55,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729248001] [2023-11-24 21:56:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729248001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:56,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:56,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:56:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662554196] [2023-11-24 21:56:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:56,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:56:56,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:56:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:56,204 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:56,360 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-11-24 21:56:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:56:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:56:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:56,361 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:56:56,361 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 21:56:56,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:56:56,362 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:56,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 57 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 21:56:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-11-24 21:56:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-11-24 21:56:56,365 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 21 [2023-11-24 21:56:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:56,365 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-11-24 21:56:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-11-24 21:56:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:56:56,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:56,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:56:56,367 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:56,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -894662474, now seen corresponding path program 1 times [2023-11-24 21:56:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227248075] [2023-11-24 21:56:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:56,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227248075] [2023-11-24 21:56:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227248075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:56,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832899433] [2023-11-24 21:56:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:56,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:56,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:56:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:56,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:56:56,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:56,841 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 [2023-11-24 21:56:56,886 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:56:56,886 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 [2023-11-24 21:56:56,916 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 15 treesize of output 1 [2023-11-24 21:56:56,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:56,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2023-11-24 21:56:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:57,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:57,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832899433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:57,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:57,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2023-11-24 21:56:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563462080] [2023-11-24 21:56:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:56:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:56:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:56:57,005 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:57,251 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-11-24 21:56:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:56:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:56:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:57,253 INFO L225 Difference]: With dead ends: 70 [2023-11-24 21:56:57,253 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 21:56:57,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:56:57,254 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:57,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 21:56:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2023-11-24 21:56:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-24 21:56:57,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 22 [2023-11-24 21:56:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:57,257 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-24 21:56:57,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-24 21:56:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:56:57,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:57,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:57,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:57,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:56:57,470 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:56:57,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:57,470 INFO L85 PathProgramCache]: Analyzing trace with hash -88944713, now seen corresponding path program 1 times [2023-11-24 21:56:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:57,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968941349] [2023-11-24 21:56:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:57,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:57,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968941349] [2023-11-24 21:56:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968941349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139989132] [2023-11-24 21:56:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:57,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:57,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:57,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:57,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:56:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:57,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:56:57,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:57,914 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 [2023-11-24 21:56:57,933 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:56:57,934 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 [2023-11-24 21:56:57,956 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 11 treesize of output 7 [2023-11-24 21:56:57,997 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 21:56:57,998 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-24 21:56:58,038 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 29 treesize of output 24 [2023-11-24 21:56:58,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:58,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-24 21:56:58,201 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 14 treesize of output 9 [2023-11-24 21:56:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:58,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:56:58,594 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:58,595 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 45 treesize of output 49 [2023-11-24 21:56:58,675 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_prenex_1 (Array Int Int))) (or (= |c_ULTIMATE.start_main_~list~0#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~list~0#1.base| v_prenex_1) |c_ULTIMATE.start_main_~y~0#1.base|) v_prenex_2)) (< v_prenex_2 0) (< |c_ULTIMATE.start_main_~y~0#1.offset| v_prenex_2))) (forall ((|v_ULTIMATE.start_main_~list~0#1.offset_32| Int) (v_ArrVal_575 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~y~0#1.offset| |v_ULTIMATE.start_main_~list~0#1.offset_32|) (not (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_575) |c_ULTIMATE.start_main_~y~0#1.base|) |v_ULTIMATE.start_main_~list~0#1.offset_32|) |c_ULTIMATE.start_main_~y~0#1.base|)) (< |v_ULTIMATE.start_main_~list~0#1.offset_32| 0)))) is different from false [2023-11-24 21:56:58,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:58,696 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-24 21:56:58,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:56:58,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-11-24 21:56:58,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-24 21:56:58,748 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:56:58,749 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:56:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139989132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:56:58,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:56:58,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-24 21:56:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799871586] [2023-11-24 21:56:58,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:56:58,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:56:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:56:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2023-11-24 21:56:58,822 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:00,064 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-11-24 21:57:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:57:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:57:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:00,066 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:57:00,066 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 21:57:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=421, Invalid=1222, Unknown=1, NotChecked=78, Total=1722 [2023-11-24 21:57:00,067 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 157 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 161 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 564 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2023-11-24 21:57:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 21:57:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2023-11-24 21:57:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2023-11-24 21:57:00,070 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 22 [2023-11-24 21:57:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:00,071 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2023-11-24 21:57:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2023-11-24 21:57:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:57:00,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:00,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:00,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:57:00,273 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:00,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:00,273 INFO L85 PathProgramCache]: Analyzing trace with hash -88944712, now seen corresponding path program 1 times [2023-11-24 21:57:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:00,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721116889] [2023-11-24 21:57:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:00,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721116889] [2023-11-24 21:57:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721116889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205707986] [2023-11-24 21:57:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:00,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:00,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:00,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:00,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:57:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:00,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-24 21:57:00,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:00,884 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 [2023-11-24 21:57:00,888 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 [2023-11-24 21:57:01,000 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:57:01,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 13 [2023-11-24 21:57:01,019 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:01,019 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 [2023-11-24 21:57:01,055 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 11 treesize of output 7 [2023-11-24 21:57:01,065 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 11 treesize of output 7 [2023-11-24 21:57:01,117 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 21:57:01,118 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-24 21:57:01,123 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 24 treesize of output 11 [2023-11-24 21:57:01,181 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 [2023-11-24 21:57:01,188 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 29 treesize of output 24 [2023-11-24 21:57:01,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-24 21:57:01,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:57:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:01,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:01,763 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_667 (Array Int Int)) (|v_ULTIMATE.start_main_~list~0#1.offset_36| Int) (v_ArrVal_668 (Array Int Int))) (or (< (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_667) |c_ULTIMATE.start_main_~y~0#1.base|) |v_ULTIMATE.start_main_~list~0#1.offset_36|) 3) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_668) |c_ULTIMATE.start_main_~y~0#1.base|) |v_ULTIMATE.start_main_~list~0#1.offset_36|))) (< |v_ULTIMATE.start_main_~list~0#1.offset_36| 0) (< |c_ULTIMATE.start_main_~y~0#1.offset| |v_ULTIMATE.start_main_~list~0#1.offset_36|))) (forall ((v_ArrVal_667 (Array Int Int)) (|v_ULTIMATE.start_main_~list~0#1.offset_36| Int)) (or (< |v_ULTIMATE.start_main_~list~0#1.offset_36| 0) (< 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_667) |c_ULTIMATE.start_main_~y~0#1.base|) |v_ULTIMATE.start_main_~list~0#1.offset_36|) 1)) (< |c_ULTIMATE.start_main_~y~0#1.offset| |v_ULTIMATE.start_main_~list~0#1.offset_36|)))) is different from false [2023-11-24 21:57:01,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:01,785 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-11-24 21:57:01,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:01,792 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-11-24 21:57:01,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:01,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2023-11-24 21:57:01,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:01,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2023-11-24 21:57:01,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-24 21:57:01,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-24 21:57:01,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:01,888 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-11-24 21:57:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:57:01,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-24 21:57:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205707986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:02,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2023-11-24 21:57:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286288432] [2023-11-24 21:57:02,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:57:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:57:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=479, Unknown=1, NotChecked=44, Total=600 [2023-11-24 21:57:02,150 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:03,502 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2023-11-24 21:57:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:57:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:57:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:03,503 INFO L225 Difference]: With dead ends: 109 [2023-11-24 21:57:03,504 INFO L226 Difference]: Without dead ends: 109 [2023-11-24 21:57:03,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=470, Invalid=1255, Unknown=1, NotChecked=80, Total=1806 [2023-11-24 21:57:03,505 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:03,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 148 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 410 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2023-11-24 21:57:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-24 21:57:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2023-11-24 21:57:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.421875) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2023-11-24 21:57:03,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 22 [2023-11-24 21:57:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:03,509 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2023-11-24 21:57:03,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2023-11-24 21:57:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:57:03,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:03,514 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] [2023-11-24 21:57:03,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:57:03,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:03,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1537680289, now seen corresponding path program 1 times [2023-11-24 21:57:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459576045] [2023-11-24 21:57:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:03,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459576045] [2023-11-24 21:57:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459576045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757781360] [2023-11-24 21:57:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:03,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:03,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:57:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:04,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 21:57:04,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:04,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:57:04,100 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:04,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:57:04,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:57:04,154 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 21:57:04,155 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-24 21:57:04,215 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 28 treesize of output 23 [2023-11-24 21:57:04,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:04,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-24 21:57:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:04,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:04,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:04,502 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-11-24 21:57:04,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:04,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2023-11-24 21:57:04,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-24 21:57:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757781360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:04,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-24 21:57:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417572845] [2023-11-24 21:57:04,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:57:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:57:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:57:04,669 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:05,658 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2023-11-24 21:57:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:57:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:57:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:05,659 INFO L225 Difference]: With dead ends: 106 [2023-11-24 21:57:05,659 INFO L226 Difference]: Without dead ends: 106 [2023-11-24 21:57:05,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=1135, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 21:57:05,661 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 161 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:05,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 178 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:57:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-24 21:57:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 76. [2023-11-24 21:57:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.390625) internal successors, (89), 75 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2023-11-24 21:57:05,664 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 23 [2023-11-24 21:57:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:05,664 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2023-11-24 21:57:05,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2023-11-24 21:57:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:57:05,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:05,665 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] [2023-11-24 21:57:05,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:05,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 21:57:05,871 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:05,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1745358440, now seen corresponding path program 1 times [2023-11-24 21:57:05,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705706254] [2023-11-24 21:57:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:06,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705706254] [2023-11-24 21:57:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705706254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:57:06,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:57:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:57:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209381381] [2023-11-24 21:57:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:57:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:57:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:57:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:57:06,339 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:06,588 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2023-11-24 21:57:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:57:06,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:57:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:06,589 INFO L225 Difference]: With dead ends: 84 [2023-11-24 21:57:06,589 INFO L226 Difference]: Without dead ends: 84 [2023-11-24 21:57:06,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:57:06,590 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:06,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 81 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:57:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-24 21:57:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2023-11-24 21:57:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.375) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2023-11-24 21:57:06,593 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 24 [2023-11-24 21:57:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:06,593 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2023-11-24 21:57:06,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2023-11-24 21:57:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:57:06,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:06,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:06,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:57:06,594 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:06,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2042754587, now seen corresponding path program 1 times [2023-11-24 21:57:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:06,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496712324] [2023-11-24 21:57:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:07,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496712324] [2023-11-24 21:57:07,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496712324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442417448] [2023-11-24 21:57:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:07,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:07,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:57:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:07,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-24 21:57:07,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:07,526 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 [2023-11-24 21:57:07,564 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:07,564 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 [2023-11-24 21:57:07,574 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 11 treesize of output 7 [2023-11-24 21:57:07,593 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-24 21:57:07,593 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-24 21:57:07,622 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:57:07,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:57:07,636 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 45 treesize of output 25 [2023-11-24 21:57:07,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:07,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 38 [2023-11-24 21:57:07,915 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:57:07,916 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 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-24 21:57:07,955 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 14 treesize of output 9 [2023-11-24 21:57:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:07,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:08,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:08,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 411 treesize of output 461 [2023-11-24 21:57:10,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:10,221 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 52 [2023-11-24 21:57:10,225 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 90 treesize of output 82 [2023-11-24 21:57:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:10,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:10,254 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 69 treesize of output 83 [2023-11-24 21:57:10,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:10,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:10,273 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 62 treesize of output 62 [2023-11-24 21:57:10,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:10,385 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:57:10,393 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 40 treesize of output 36 [2023-11-24 21:57:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:57:10,400 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-24 21:57:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:57:10,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:57:10,428 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 1 [2023-11-24 21:57:10,438 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,438 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 1 [2023-11-24 21:57:10,448 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,448 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 1 [2023-11-24 21:57:10,457 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 1 [2023-11-24 21:57:10,465 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 1 [2023-11-24 21:57:10,474 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:57:10,474 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 1 [2023-11-24 21:57:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442417448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:11,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 33 [2023-11-24 21:57:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722215019] [2023-11-24 21:57:11,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 21:57:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 21:57:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1035, Unknown=1, NotChecked=0, Total=1190 [2023-11-24 21:57:11,319 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:12,596 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2023-11-24 21:57:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:57:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 21:57:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:12,598 INFO L225 Difference]: With dead ends: 85 [2023-11-24 21:57:12,598 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 21:57:12,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=476, Invalid=2073, Unknown=1, NotChecked=0, Total=2550 [2023-11-24 21:57:12,600 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 184 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:12,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 165 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:57:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 21:57:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2023-11-24 21:57:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 69 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-11-24 21:57:12,603 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 26 [2023-11-24 21:57:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:12,603 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-11-24 21:57:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-11-24 21:57:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:57:12,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:12,605 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] [2023-11-24 21:57:12,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:12,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:12,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1023843419, now seen corresponding path program 1 times [2023-11-24 21:57:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524034027] [2023-11-24 21:57:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:13,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:57:13,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524034027] [2023-11-24 21:57:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524034027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:57:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057472336] [2023-11-24 21:57:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:13,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:57:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:57:13,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:57:13,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:57:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:57:13,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-24 21:57:13,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:57:13,900 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 [2023-11-24 21:57:13,917 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 [2023-11-24 21:57:13,921 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 [2023-11-24 21:57:13,948 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:57:13,949 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 [2023-11-24 21:57:13,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:57:14,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:57:14,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:14,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 54 [2023-11-24 21:57:14,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2023-11-24 21:57:14,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-24 21:57:14,139 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:57:14,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 46 [2023-11-24 21:57:14,729 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-24 21:57:14,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 37 [2023-11-24 21:57:14,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-24 21:57:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:14,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:57:31,773 INFO L349 Elim1Store]: treesize reduction 1393, result has 19.4 percent of original size [2023-11-24 21:57:31,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 2139 treesize of output 1895 [2023-11-24 21:57:31,864 INFO L349 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-11-24 21:57:31,864 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 1010 treesize of output 608 [2023-11-24 21:57:31,896 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 214 treesize of output 198 [2023-11-24 21:57:31,920 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-24 21:57:31,920 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 306 treesize of output 288 [2023-11-24 21:57:31,988 INFO L349 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2023-11-24 21:57:31,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 212 [2023-11-24 21:57:32,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:32,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 74 [2023-11-24 21:57:32,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-24 21:57:32,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:57:32,234 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 34 treesize of output 36 [2023-11-24 21:57:32,297 INFO L349 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2023-11-24 21:57:32,297 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 114 [2023-11-24 21:57:32,419 INFO L349 Elim1Store]: treesize reduction 1865, result has 0.1 percent of original size [2023-11-24 21:57:32,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1280 treesize of output 1 [2023-11-24 21:57:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:57:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057472336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:57:32,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:57:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-11-24 21:57:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949842954] [2023-11-24 21:57:32,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:57:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 21:57:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:57:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 21:57:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=707, Unknown=2, NotChecked=0, Total=812 [2023-11-24 21:57:32,521 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:57:37,991 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2023-11-24 21:57:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-24 21:57:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 21:57:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:57:37,993 INFO L225 Difference]: With dead ends: 136 [2023-11-24 21:57:37,993 INFO L226 Difference]: Without dead ends: 136 [2023-11-24 21:57:37,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=569, Invalid=2508, Unknown=3, NotChecked=0, Total=3080 [2023-11-24 21:57:37,995 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 232 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:57:37,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 233 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 21:57:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-24 21:57:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2023-11-24 21:57:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-11-24 21:57:38,000 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 26 [2023-11-24 21:57:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:57:38,000 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-11-24 21:57:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:57:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-11-24 21:57:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:57:38,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:57:38,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:57:38,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:57:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fbf5be2-8dc9-4c38-9f07-4df38c7e06b7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 21:57:38,208 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-11-24 21:57:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:57:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1023832434, now seen corresponding path program 1 times [2023-11-24 21:57:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:57:38,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667696270] [2023-11-24 21:57:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:57:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:57:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat