./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/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_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/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_78679841-be81-48f1-b29a-f857c6f3f4f4/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 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:48:42,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:48:42,122 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:48:42,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:48:42,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:48:42,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:48:42,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:48:42,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:48:42,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:48:42,179 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:48:42,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:48:42,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:48:42,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:48:42,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:48:42,183 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:48:42,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:48:42,184 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:48:42,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:48:42,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:48:42,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:48:42,186 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:48:42,187 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:48:42,187 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:48:42,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:48:42,188 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:48:42,189 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:48:42,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:48:42,190 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:48:42,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:48:42,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:48:42,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:48:42,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:48:42,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:42,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:48:42,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:48:42,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:48:42,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:48:42,195 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:48:42,195 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:48:42,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:48:42,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:48:42,196 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_78679841-be81-48f1-b29a-f857c6f3f4f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2023-11-24 21:48:42,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:48:42,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:48:42,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:48:42,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:48:42,588 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:48:42,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2023-11-24 21:48:45,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:48:45,976 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:48:45,977 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2023-11-24 21:48:45,993 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/data/0e147ce71/bc5e5923595541849f1842ffc3067e52/FLAGffba07603 [2023-11-24 21:48:46,009 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/data/0e147ce71/bc5e5923595541849f1842ffc3067e52 [2023-11-24 21:48:46,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:48:46,013 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:48:46,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:46,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:48:46,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:48:46,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,023 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5698b8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46, skipping insertion in model container [2023-11-24 21:48:46,023 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,064 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:48:46,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:46,468 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:48:46,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:48:46,555 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:48:46,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46 WrapperNode [2023-11-24 21:48:46,555 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:48:46,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:46,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:48:46,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:48:46,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,602 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-11-24 21:48:46,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:48:46,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:48:46,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:48:46,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:48:46,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,619 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,635 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [1, 3]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [1, 2]. [2023-11-24 21:48:46,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,642 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,648 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,651 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:48:46,652 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:48:46,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:48:46,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:48:46,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (1/1) ... [2023-11-24 21:48:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:48:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:46,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:48:46,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:48:46,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:48:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:48:46,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:48:46,865 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:48:46,867 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:48:47,065 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:48:47,105 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:48:47,105 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:48:47,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:47 BoogieIcfgContainer [2023-11-24 21:48:47,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:48:47,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:48:47,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:48:47,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:48:47,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:48:46" (1/3) ... [2023-11-24 21:48:47,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac42e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:47, skipping insertion in model container [2023-11-24 21:48:47,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:48:46" (2/3) ... [2023-11-24 21:48:47,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ac42e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:48:47, skipping insertion in model container [2023-11-24 21:48:47,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:48:47" (3/3) ... [2023-11-24 21:48:47,117 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2023-11-24 21:48:47,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:48:47,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-24 21:48:47,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:48:47,195 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;@6d4a68d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:48:47,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 21:48:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 2.230769230769231) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:48:47,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:47,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:48:47,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:47,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 91588697, now seen corresponding path program 1 times [2023-11-24 21:48:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809218593] [2023-11-24 21:48:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:47,492 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 21:48:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809218593] [2023-11-24 21:48:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809218593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:47,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:47,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274692047] [2023-11-24 21:48:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:47,550 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 2.230769230769231) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:47,673 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-24 21:48:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:48:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:47,685 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:48:47,685 INFO L226 Difference]: Without dead ends: 25 [2023-11-24 21:48:47,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:47,691 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:47,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-24 21:48:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-24 21:48:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 21:48:47,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2023-11-24 21:48:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:47,735 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 21:48:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 21:48:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:48:47,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:47,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:48:47,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:48:47,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:47,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 91590619, now seen corresponding path program 1 times [2023-11-24 21:48:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:47,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170523444] [2023-11-24 21:48:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:47,805 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 21:48:47,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:47,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170523444] [2023-11-24 21:48:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170523444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:48:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823382480] [2023-11-24 21:48:47,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:47,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:47,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:47,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:47,809 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:47,848 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-24 21:48:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:48:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:47,850 INFO L225 Difference]: With dead ends: 24 [2023-11-24 21:48:47,850 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:48:47,853 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 21:48:47,855 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:47,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:48:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-24 21:48:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:48:47,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-24 21:48:47,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2023-11-24 21:48:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:47,867 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-24 21:48:47,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-24 21:48:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:48:47,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:47,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:48:47,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:48:47,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:47,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1455716916, now seen corresponding path program 1 times [2023-11-24 21:48:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:47,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249781153] [2023-11-24 21:48:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:48,051 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 21:48:48,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:48,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249781153] [2023-11-24 21:48:48,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249781153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:48,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:48,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717327799] [2023-11-24 21:48:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:48,057 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:48,115 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-11-24 21:48:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:48:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:48,118 INFO L225 Difference]: With dead ends: 38 [2023-11-24 21:48:48,118 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:48:48,123 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 21:48:48,125 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:48,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:48:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2023-11-24 21:48:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-24 21:48:48,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2023-11-24 21:48:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:48,136 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-24 21:48:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-24 21:48:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:48:48,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:48,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:48:48,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:48:48,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:48,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:48,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1455657334, now seen corresponding path program 1 times [2023-11-24 21:48:48,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711217838] [2023-11-24 21:48:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:48,306 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 21:48:48,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:48,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711217838] [2023-11-24 21:48:48,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711217838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:48,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:48,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:48,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430587794] [2023-11-24 21:48:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:48,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:48,309 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:48,353 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-11-24 21:48:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:48,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:48:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:48,355 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:48:48,355 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:48:48,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:48,357 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:48,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:48:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-24 21:48:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:48:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-24 21:48:48,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2023-11-24 21:48:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:48,361 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-24 21:48:48,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-24 21:48:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:48:48,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:48,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:48:48,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:48:48,363 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:48,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1455657333, now seen corresponding path program 1 times [2023-11-24 21:48:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689325501] [2023-11-24 21:48:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:48,442 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 21:48:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689325501] [2023-11-24 21:48:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689325501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348150495] [2023-11-24 21:48:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:48,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:48,446 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:48,497 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-11-24 21:48:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:48:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:48,500 INFO L225 Difference]: With dead ends: 40 [2023-11-24 21:48:48,500 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 21:48:48,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:48,504 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:48,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 21:48:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-11-24 21:48:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 21:48:48,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 6 [2023-11-24 21:48:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:48,515 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 21:48:48,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 21:48:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:48:48,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:48,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:48:48,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:48:48,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:48,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1453810291, now seen corresponding path program 1 times [2023-11-24 21:48:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:48,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346097924] [2023-11-24 21:48:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:48,764 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 21:48:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:48,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346097924] [2023-11-24 21:48:48,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346097924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:48,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910793167] [2023-11-24 21:48:48,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:48,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:48,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:48,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:48,768 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:48,852 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-24 21:48:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:48:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:48,854 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:48:48,854 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 21:48:48,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 21:48:48,855 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:48,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:48,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 21:48:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-24 21:48:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-24 21:48:48,860 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 6 [2023-11-24 21:48:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:48,860 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-24 21:48:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:48,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-24 21:48:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:48:48,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:48,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:48,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:48:48,862 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:48,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:48,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2117414226, now seen corresponding path program 1 times [2023-11-24 21:48:48,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:48,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705882977] [2023-11-24 21:48:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:48,975 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 21:48:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:48,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705882977] [2023-11-24 21:48:48,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705882977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:48,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318725419] [2023-11-24 21:48:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:48,979 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 21:48:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:49,011 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-11-24 21:48:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 21:48:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:49,013 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:48:49,013 INFO L226 Difference]: Without dead ends: 39 [2023-11-24 21:48:49,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:48:49,014 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-24 21:48:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2023-11-24 21:48:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 21:48:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-24 21:48:49,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2023-11-24 21:48:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:49,020 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-24 21:48:49,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 21:48:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-24 21:48:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:48:49,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:49,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:48:49,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:49,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:49,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2119261268, now seen corresponding path program 1 times [2023-11-24 21:48:49,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:49,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257262276] [2023-11-24 21:48:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:49,140 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 21:48:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257262276] [2023-11-24 21:48:49,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257262276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:49,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:49,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4101620] [2023-11-24 21:48:49,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:49,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:49,144 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 21:48:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:49,178 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-24 21:48:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:49,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-24 21:48:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:49,180 INFO L225 Difference]: With dead ends: 28 [2023-11-24 21:48:49,180 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 21:48:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:49,181 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:49,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 9 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 21:48:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-24 21:48:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-24 21:48:49,186 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2023-11-24 21:48:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:49,186 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-24 21:48:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 21:48:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-24 21:48:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:48:49,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:49,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:48:49,188 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:49,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1215332604, now seen corresponding path program 1 times [2023-11-24 21:48:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835485259] [2023-11-24 21:48:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:49,226 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 21:48:49,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:49,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835485259] [2023-11-24 21:48:49,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835485259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:49,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:49,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342331085] [2023-11-24 21:48:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:48:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:48:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:49,230 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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 21:48:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:49,249 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2023-11-24 21:48:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:48:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 21:48:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:49,251 INFO L225 Difference]: With dead ends: 23 [2023-11-24 21:48:49,251 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:48:49,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:48:49,252 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:49,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:48:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 21:48:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-24 21:48:49,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 8 [2023-11-24 21:48:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:49,256 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-24 21:48:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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 21:48:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-24 21:48:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:48:49,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:49,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:49,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:48:49,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:49,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:49,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1215332605, now seen corresponding path program 1 times [2023-11-24 21:48:49,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:49,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698414510] [2023-11-24 21:48:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:49,350 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 21:48:49,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698414510] [2023-11-24 21:48:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698414510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:49,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642202308] [2023-11-24 21:48:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:49,353 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:49,398 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-11-24 21:48:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:48:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:49,400 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:48:49,400 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:48:49,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 21:48:49,401 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:49,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:48:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2023-11-24 21:48:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-24 21:48:49,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2023-11-24 21:48:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:49,405 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-24 21:48:49,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-24 21:48:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:48:49,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:49,407 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:48:49,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:49,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1247275300, now seen corresponding path program 1 times [2023-11-24 21:48:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:49,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052347838] [2023-11-24 21:48:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:49,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:49,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052347838] [2023-11-24 21:48:49,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052347838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:49,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704124996] [2023-11-24 21:48:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:49,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:49,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:49,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:48:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:49,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:48:49,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:49,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:48:49,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:48:49,998 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 21:48:49,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704124996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:50,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:50,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-24 21:48:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558615442] [2023-11-24 21:48:50,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:50,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:48:50,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:48:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:48:50,200 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:50,515 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-24 21:48:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:48:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:48:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:50,517 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:48:50,517 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 21:48:50,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:48:50,518 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:50,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 42 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:48:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 21:48:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-11-24 21:48:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:48:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-24 21:48:50,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2023-11-24 21:48:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:50,522 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-24 21:48:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-24 21:48:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:48:50,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:50,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:50,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:50,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:50,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:50,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:50,730 INFO L85 PathProgramCache]: Analyzing trace with hash -979394922, now seen corresponding path program 1 times [2023-11-24 21:48:50,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901621730] [2023-11-24 21:48:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:50,828 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 21:48:50,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:50,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901621730] [2023-11-24 21:48:50,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901621730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:50,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:50,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:48:50,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562310928] [2023-11-24 21:48:50,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:50,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:50,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:50,831 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 21:48:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:50,858 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-24 21:48:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 21:48:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:50,859 INFO L225 Difference]: With dead ends: 20 [2023-11-24 21:48:50,859 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 21:48:50,860 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 21:48:50,860 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:50,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 21:48:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 21:48:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 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 21:48:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-24 21:48:50,863 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2023-11-24 21:48:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:50,864 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-24 21:48:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 21:48:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-24 21:48:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:48:50,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:50,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:50,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:48:50,865 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:50,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash -979394921, now seen corresponding path program 1 times [2023-11-24 21:48:50,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:50,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159320197] [2023-11-24 21:48:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,053 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 21:48:51,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159320197] [2023-11-24 21:48:51,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159320197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:51,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225177148] [2023-11-24 21:48:51,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:48:51,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:48:51,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:48:51,056 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 21:48:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:51,135 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-24 21:48:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:48:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 21:48:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:51,137 INFO L225 Difference]: With dead ends: 36 [2023-11-24 21:48:51,137 INFO L226 Difference]: Without dead ends: 36 [2023-11-24 21:48:51,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:48:51,139 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:51,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-24 21:48:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-11-24 21:48:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-24 21:48:51,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2023-11-24 21:48:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:51,151 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-24 21:48:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 21:48:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-24 21:48:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:48:51,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:51,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:48:51,153 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1788741547, now seen corresponding path program 1 times [2023-11-24 21:48:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899184714] [2023-11-24 21:48:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,359 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 21:48:51,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899184714] [2023-11-24 21:48:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899184714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:48:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062694841] [2023-11-24 21:48:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:48:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:48:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:51,363 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:48:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:51,424 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-24 21:48:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:48:51,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:48:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:51,426 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:48:51,426 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:48:51,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:48:51,427 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:51,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 16 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:48:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2023-11-24 21:48:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:48:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-24 21:48:51,433 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2023-11-24 21:48:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:51,433 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-24 21:48:51,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 21:48:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-24 21:48:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:48:51,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:51,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:48:51,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:51,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -600680931, now seen corresponding path program 1 times [2023-11-24 21:48:51,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:51,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160776574] [2023-11-24 21:48:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:51,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:51,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160776574] [2023-11-24 21:48:51,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160776574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:48:51,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134035875] [2023-11-24 21:48:51,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:48:51,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:48:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:48:51,597 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:51,654 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-24 21:48:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:48:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 21:48:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:51,655 INFO L225 Difference]: With dead ends: 31 [2023-11-24 21:48:51,655 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:48:51,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:48:51,658 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:51,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:48:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-11-24 21:48:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 21:48:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-24 21:48:51,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 11 [2023-11-24 21:48:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:51,664 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-24 21:48:51,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:51,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-24 21:48:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:48:51,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:51,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:51,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:48:51,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:51,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash 79377439, now seen corresponding path program 1 times [2023-11-24 21:48:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:51,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985111882] [2023-11-24 21:48:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:51,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:51,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985111882] [2023-11-24 21:48:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985111882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:51,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:48:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716678475] [2023-11-24 21:48:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:48:51,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:48:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:48:51,931 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,015 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-11-24 21:48:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:48:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 21:48:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:52,016 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:48:52,016 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 21:48:52,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:48:52,017 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:52,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 21:48:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-24 21:48:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-24 21:48:52,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2023-11-24 21:48:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,028 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-24 21:48:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-24 21:48:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:48:52,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:48:52,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -313649571, now seen corresponding path program 1 times [2023-11-24 21:48:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034616029] [2023-11-24 21:48:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034616029] [2023-11-24 21:48:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034616029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:48:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779770733] [2023-11-24 21:48:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:52,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:48:52,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:52,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:48:52,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:48:52,238 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,314 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-24 21:48:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:48:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 21:48:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:52,315 INFO L225 Difference]: With dead ends: 36 [2023-11-24 21:48:52,315 INFO L226 Difference]: Without dead ends: 36 [2023-11-24 21:48:52,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:48:52,316 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:52,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-24 21:48:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2023-11-24 21:48:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 21:48:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-24 21:48:52,327 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 11 [2023-11-24 21:48:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,329 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-24 21:48:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-24 21:48:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:48:52,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:48:52,333 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:52,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1441256104, now seen corresponding path program 1 times [2023-11-24 21:48:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428835706] [2023-11-24 21:48:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,483 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 21:48:52,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428835706] [2023-11-24 21:48:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428835706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:48:52,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:48:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:48:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828307191] [2023-11-24 21:48:52,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:48:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:48:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:48:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:52,487 INFO L87 Difference]: Start difference. First operand 27 states and 32 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 21:48:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:52,509 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-24 21:48:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:48:52,509 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 21:48:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:52,510 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:48:52,510 INFO L226 Difference]: Without dead ends: 16 [2023-11-24 21:48:52,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:48:52,512 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:52,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:48:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-24 21:48:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-24 21:48:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-24 21:48:52,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-11-24 21:48:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:52,514 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-24 21:48:52,514 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 21:48:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-24 21:48:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:48:52,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:52,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:52,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:48:52,516 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:52,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash 999364206, now seen corresponding path program 1 times [2023-11-24 21:48:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956548275] [2023-11-24 21:48:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956548275] [2023-11-24 21:48:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956548275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:52,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884736312] [2023-11-24 21:48:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:52,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:52,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:52,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:52,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:48:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:52,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:48:52,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:52,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:53,019 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 21:48:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:53,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884736312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:53,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:53,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-24 21:48:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263644979] [2023-11-24 21:48:53,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:53,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:48:53,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:53,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:48:53,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:48:53,054 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:53,198 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2023-11-24 21:48:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:48:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 21:48:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:53,200 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:48:53,200 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:48:53,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-24 21:48:53,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:53,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:48:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2023-11-24 21:48:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 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 21:48:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-24 21:48:53,205 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-11-24 21:48:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:53,207 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-24 21:48:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-24 21:48:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:48:53,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:53,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:53,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:53,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:53,409 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:53,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 915519302, now seen corresponding path program 1 times [2023-11-24 21:48:53,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:53,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107507361] [2023-11-24 21:48:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:53,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:53,709 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 21:48:53,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107507361] [2023-11-24 21:48:53,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107507361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:53,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465376326] [2023-11-24 21:48:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:53,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:53,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:48:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:53,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-24 21:48:53,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:53,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:53,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:48:53,993 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 21:48:53,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:54,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:48:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:54,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465376326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:54,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:54,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-11-24 21:48:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255172133] [2023-11-24 21:48:54,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:48:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:48:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:48:54,280 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:54,539 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-11-24 21:48:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:48:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:48:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:54,540 INFO L225 Difference]: With dead ends: 21 [2023-11-24 21:48:54,540 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 21:48:54,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:48:54,541 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:54,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 10 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 21:48:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-24 21:48:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 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 21:48:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-24 21:48:54,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2023-11-24 21:48:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:54,544 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-24 21:48:54,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-24 21:48:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:48:54,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:54,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:54,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:54,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-24 21:48:54,752 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:54,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -654246132, now seen corresponding path program 2 times [2023-11-24 21:48:54,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:54,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738811383] [2023-11-24 21:48:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:54,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738811383] [2023-11-24 21:48:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738811383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127106342] [2023-11-24 21:48:55,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:48:55,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:55,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:55,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:48:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:48:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:55,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:48:55,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:55,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-24 21:48:55,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:48:55,388 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 19 [2023-11-24 21:48:55,489 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 21:48:55,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:55,734 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 21:48:55,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-24 21:48:55,753 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 21:48:55,779 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 21:48:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127106342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:55,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:55,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-24 21:48:55,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680038218] [2023-11-24 21:48:55,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 21:48:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 21:48:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:48:55,784 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:56,528 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-11-24 21:48:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:48:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:48:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:56,529 INFO L225 Difference]: With dead ends: 35 [2023-11-24 21:48:56,529 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:48:56,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:48:56,531 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:56,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 50 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:48:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:48:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-24 21:48:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 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 21:48:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-24 21:48:56,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2023-11-24 21:48:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:56,533 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-24 21:48:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-24 21:48:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:48:56,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:56,534 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:56,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:56,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-24 21:48:56,735 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:56,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash 443273657, now seen corresponding path program 2 times [2023-11-24 21:48:56,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:56,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597306008] [2023-11-24 21:48:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597306008] [2023-11-24 21:48:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597306008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75316871] [2023-11-24 21:48:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:48:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:57,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:57,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:57,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:48:57,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:48:57,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:57,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-24 21:48:57,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:57,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:48:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:48:57,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:48:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:57,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:48:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:57,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75316871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:57,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:57,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-11-24 21:48:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177696188] [2023-11-24 21:48:57,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:57,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:48:57,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:57,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:48:57,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:48:57,935 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 21:48:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:58,301 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-24 21:48:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:48:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 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 21:48:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:58,302 INFO L225 Difference]: With dead ends: 25 [2023-11-24 21:48:58,302 INFO L226 Difference]: Without dead ends: 25 [2023-11-24 21:48:58,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:48:58,303 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 95 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:58,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 19 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:48:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-24 21:48:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-24 21:48:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 21:48:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-24 21:48:58,305 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2023-11-24 21:48:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:58,305 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-24 21:48:58,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 21:48:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-24 21:48:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:48:58,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:58,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:58,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:58,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:58,513 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 784222399, now seen corresponding path program 3 times [2023-11-24 21:48:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:58,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288930903] [2023-11-24 21:48:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:58,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288930903] [2023-11-24 21:48:58,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288930903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:58,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583820242] [2023-11-24 21:48:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:48:58,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:58,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:58,917 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:48:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:48:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:59,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:48:59,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:59,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:48:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:59,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:59,183 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 21:48:59,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 21:48:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:59,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583820242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:59,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:59,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-24 21:48:59,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518745311] [2023-11-24 21:48:59,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:59,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:48:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:48:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:48:59,251 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:59,474 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2023-11-24 21:48:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:48:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:48:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:59,476 INFO L225 Difference]: With dead ends: 38 [2023-11-24 21:48:59,476 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 21:48:59,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:48:59,477 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:59,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 77 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:48:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 21:48:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-24 21:48:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-24 21:48:59,479 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2023-11-24 21:48:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:59,479 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-24 21:48:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-24 21:48:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:48:59,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:59,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:59,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:59,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:59,681 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:48:59,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1468979312, now seen corresponding path program 4 times [2023-11-24 21:48:59,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772791810] [2023-11-24 21:48:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:59,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:59,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772791810] [2023-11-24 21:48:59,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772791810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:59,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299097036] [2023-11-24 21:48:59,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:48:59,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:59,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:00,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:49:00,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:49:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:00,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:49:00,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:00,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-24 21:49:00,843 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-11-24 21:49:00,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2023-11-24 21:49:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:49:00,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:01,336 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 44 treesize of output 38 [2023-11-24 21:49:01,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 68 treesize of output 58 [2023-11-24 21:49:01,371 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 21:49:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:49:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299097036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:01,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:01,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-24 21:49:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104989857] [2023-11-24 21:49:01,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:49:01,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:49:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:49:01,398 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 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 21:49:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:02,151 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-11-24 21:49:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:49:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 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 21:49:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:02,152 INFO L225 Difference]: With dead ends: 26 [2023-11-24 21:49:02,152 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 21:49:02,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 21:49:02,154 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:02,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:49:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 21:49:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-24 21:49:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states 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 21:49:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-24 21:49:02,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-11-24 21:49:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-24 21:49:02,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 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 21:49:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-24 21:49:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:49:02,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:02,157 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:02,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 21:49:02,363 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:02,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1706281572, now seen corresponding path program 3 times [2023-11-24 21:49:02,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:02,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040748495] [2023-11-24 21:49:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:02,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040748495] [2023-11-24 21:49:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040748495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096047524] [2023-11-24 21:49:02,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:49:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:02,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:02,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:49:03,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:49:03,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:03,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-24 21:49:03,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:03,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 21:49:03,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:49:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:03,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:04,041 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:49:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096047524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:04,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-24 21:49:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395732097] [2023-11-24 21:49:04,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-24 21:49:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-24 21:49:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-24 21:49:04,101 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 21:49:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:04,734 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-11-24 21:49:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:49:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:49:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:04,735 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:49:04,735 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:49:04,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2023-11-24 21:49:04,737 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:04,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 22 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:49:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:49:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-24 21:49:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-24 21:49:04,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-11-24 21:49:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:04,739 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-24 21:49:04,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 21:49:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-24 21:49:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:49:04,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:04,740 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:04,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:04,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:04,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:04,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash 896373386, now seen corresponding path program 4 times [2023-11-24 21:49:04,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:04,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536372620] [2023-11-24 21:49:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:04,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:05,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536372620] [2023-11-24 21:49:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536372620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471185138] [2023-11-24 21:49:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:49:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:05,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:05,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:49:05,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:49:05,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:05,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-24 21:49:05,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:05,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:49:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:05,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:05,983 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 21:49:05,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 21:49:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471185138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:06,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:06,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-11-24 21:49:06,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568280573] [2023-11-24 21:49:06,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:06,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:49:06,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:06,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:49:06,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:49:06,074 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:49:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:06,765 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-24 21:49:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:49:06,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 21:49:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:06,766 INFO L225 Difference]: With dead ends: 45 [2023-11-24 21:49:06,766 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:49:06,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:49:06,768 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:06,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 61 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:49:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:49:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-24 21:49:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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 21:49:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-24 21:49:06,770 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2023-11-24 21:49:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-24 21:49:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:49:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-24 21:49:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:49:06,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:06,771 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:06,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:06,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:49:06,972 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:06,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:06,972 INFO L85 PathProgramCache]: Analyzing trace with hash -117944165, now seen corresponding path program 5 times [2023-11-24 21:49:06,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:06,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230645283] [2023-11-24 21:49:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:06,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230645283] [2023-11-24 21:49:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230645283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326207478] [2023-11-24 21:49:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:49:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:07,635 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:07,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:49:07,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-24 21:49:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:07,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:49:07,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:07,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:49:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:07,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:49:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:09,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:10,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:49:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326207478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:10,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:10,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 36 [2023-11-24 21:49:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819172309] [2023-11-24 21:49:10,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-24 21:49:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-24 21:49:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2023-11-24 21:49:10,350 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:49:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:12,396 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-11-24 21:49:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:49:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 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 29 [2023-11-24 21:49:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:12,397 INFO L225 Difference]: With dead ends: 34 [2023-11-24 21:49:12,398 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:49:12,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=391, Invalid=2159, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 21:49:12,400 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 170 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:12,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 18 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:49:12,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:49:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-24 21:49:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 21:49:12,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-24 21:49:12,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2023-11-24 21:49:12,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:12,403 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-24 21:49:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:49:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-24 21:49:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:49:12,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:12,404 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:12,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:49:12,612 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:12,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -391361293, now seen corresponding path program 6 times [2023-11-24 21:49:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:12,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535501954] [2023-11-24 21:49:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535501954] [2023-11-24 21:49:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535501954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095000445] [2023-11-24 21:49:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:49:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:13,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:13,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:49:13,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-24 21:49:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:13,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 21:49:13,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:13,786 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 21:49:14,022 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 7 treesize of output 3 [2023-11-24 21:49:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:14,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:14,252 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 21:49:14,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-24 21:49:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:14,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095000445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:14,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:14,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2023-11-24 21:49:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238575752] [2023-11-24 21:49:14,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-24 21:49:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:14,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-24 21:49:14,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 21:49:14,533 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 21:49:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:15,715 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2023-11-24 21:49:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 21:49:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-24 21:49:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:15,717 INFO L225 Difference]: With dead ends: 53 [2023-11-24 21:49:15,717 INFO L226 Difference]: Without dead ends: 36 [2023-11-24 21:49:15,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2023-11-24 21:49:15,719 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:15,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 93 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:49:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-24 21:49:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-11-24 21:49:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-24 21:49:15,722 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2023-11-24 21:49:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:15,722 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-24 21:49:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 21:49:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-24 21:49:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 21:49:15,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:15,723 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:15,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:49:15,930 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:15,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash 556446082, now seen corresponding path program 7 times [2023-11-24 21:49:15,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:15,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127350499] [2023-11-24 21:49:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:16,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127350499] [2023-11-24 21:49:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127350499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:16,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579547501] [2023-11-24 21:49:16,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:49:16,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:16,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:16,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:49:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:16,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 21:49:16,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:16,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:49:17,006 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 21:49:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:18,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:19,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579547501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:19,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:19,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-11-24 21:49:19,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213972283] [2023-11-24 21:49:19,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:19,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-24 21:49:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-24 21:49:19,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2023-11-24 21:49:19,052 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:20,281 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-11-24 21:49:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:49:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-24 21:49:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:20,282 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:49:20,282 INFO L226 Difference]: Without dead ends: 39 [2023-11-24 21:49:20,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2023-11-24 21:49:20,284 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 165 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:20,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 33 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:49:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-24 21:49:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-11-24 21:49:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-24 21:49:20,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2023-11-24 21:49:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:20,287 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-24 21:49:20,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 43 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-24 21:49:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:49:20,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:20,288 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:20,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-24 21:49:20,494 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:20,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1488523604, now seen corresponding path program 8 times [2023-11-24 21:49:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197373439] [2023-11-24 21:49:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197373439] [2023-11-24 21:49:21,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197373439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:21,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500864874] [2023-11-24 21:49:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:49:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:21,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:21,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:49:21,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:49:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:21,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-24 21:49:21,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:21,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:49:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:22,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500864874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:22,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:22,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2023-11-24 21:49:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478878266] [2023-11-24 21:49:22,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:22,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-24 21:49:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-24 21:49:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:49:22,790 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:49:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:23,527 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2023-11-24 21:49:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:49:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-24 21:49:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:23,528 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:49:23,528 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:49:23,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 21:49:23,530 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:23,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:49:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:49:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-24 21:49:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-24 21:49:23,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2023-11-24 21:49:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:23,532 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-24 21:49:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:49:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-24 21:49:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 21:49:23,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:23,533 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:23,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:23,734 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:23,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1507062915, now seen corresponding path program 9 times [2023-11-24 21:49:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:23,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198211182] [2023-11-24 21:49:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198211182] [2023-11-24 21:49:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198211182] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037495907] [2023-11-24 21:49:24,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:49:24,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:24,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:24,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:49:25,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-24 21:49:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:25,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-24 21:49:25,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:25,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:49:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:49:25,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:49:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:26,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:49:27,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:49:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037495907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:49:27,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:49:27,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 51 [2023-11-24 21:49:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700585452] [2023-11-24 21:49:27,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:49:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-24 21:49:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:49:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-24 21:49:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2491, Unknown=0, NotChecked=0, Total=2756 [2023-11-24 21:49:27,769 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 53 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 21:49:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:49:29,396 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-24 21:49:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 21:49:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-24 21:49:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:49:29,397 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:49:29,397 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:49:29,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=687, Invalid=5013, Unknown=0, NotChecked=0, Total=5700 [2023-11-24 21:49:29,400 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 263 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:49:29,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 25 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:49:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:49:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-11-24 21:49:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:49:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-11-24 21:49:29,403 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2023-11-24 21:49:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:49:29,403 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-11-24 21:49:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 21:49:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-11-24 21:49:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:49:29,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:49:29,404 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:49:29,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:49:29,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:29,611 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 21:49:29,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:49:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1618145583, now seen corresponding path program 10 times [2023-11-24 21:49:29,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:49:29,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508470530] [2023-11-24 21:49:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:49:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:49:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:49:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 58 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:49:30,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:49:30,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508470530] [2023-11-24 21:49:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508470530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:49:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220423276] [2023-11-24 21:49:30,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:49:30,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:49:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:49:30,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:49:30,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_78679841-be81-48f1-b29a-f857c6f3f4f4/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:49:30,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:49:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:49:30,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 21:49:30,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:49:31,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10