./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl --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 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:32:23,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:32:23,471 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:32:23,476 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:32:23,476 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:32:23,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:32:23,502 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:32:23,503 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:32:23,504 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:32:23,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:32:23,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:32:23,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:32:23,510 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:32:23,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:32:23,511 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:32:23,511 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:32:23,512 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:32:23,512 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:32:23,513 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:32:23,514 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:32:23,514 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:32:23,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:32:23,516 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:32:23,516 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:32:23,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:32:23,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:32:23,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:32:23,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:32:23,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:32:23,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:23,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:32:23,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:32:23,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:32:23,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:32:23,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:32:23,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:32:23,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:32:23,523 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:32:23,524 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_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71fe950642bac282d48da6f500677ae534e71a907f9a56d9941372cc95f40daa [2023-11-12 02:32:23,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:32:23,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:32:23,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:32:23,841 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:32:23,842 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:32:23,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2023-11-12 02:32:27,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:32:27,479 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:32:27,480 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-1.i [2023-11-12 02:32:27,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/data/95fc6e9a5/3a6eb1a41506406ea497eeafa20ff550/FLAG8cbc614ce [2023-11-12 02:32:27,512 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/data/95fc6e9a5/3a6eb1a41506406ea497eeafa20ff550 [2023-11-12 02:32:27,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:32:27,518 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:32:27,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:27,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:32:27,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:32:27,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:27" (1/1) ... [2023-11-12 02:32:27,528 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42fb3356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:27, skipping insertion in model container [2023-11-12 02:32:27,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:27" (1/1) ... [2023-11-12 02:32:27,610 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:32:27,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:27,944 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:32:28,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:28,039 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:32:28,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28 WrapperNode [2023-11-12 02:32:28,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:28,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:28,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:32:28,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:32:28,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,085 INFO L138 Inliner]: procedures = 122, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2023-11-12 02:32:28,085 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:28,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:32:28,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:32:28,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:32:28,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:32:28,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:32:28,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:32:28,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:32:28,144 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (1/1) ... [2023-11-12 02:32:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:28,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:28,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:32:28,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:32:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-12 02:32:28,224 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-12 02:32:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:32:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:32:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:32:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:32:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:32:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:32:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:32:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:32:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:32:28,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:32:28,354 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:32:28,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:32:28,391 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-12 02:32:28,404 WARN L817 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-11-12 02:32:28,722 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume !false; [2023-11-12 02:32:28,723 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume false; [2023-11-12 02:32:28,723 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L12: assume !false; [2023-11-12 02:32:28,723 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L12: assume false;havoc reach_error_#t~nondet0#1.base, reach_error_#t~nondet0#1.offset; [2023-11-12 02:32:28,724 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L12-1: havoc reach_error_#t~nondet0#1.base, reach_error_#t~nondet0#1.offset;assume { :end_inline_reach_error } true;assume false; [2023-11-12 02:32:28,725 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:32:28,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:32:28,733 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:32:28,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:28 BoogieIcfgContainer [2023-11-12 02:32:28,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:32:28,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:32:28,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:32:28,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:32:28,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:32:27" (1/3) ... [2023-11-12 02:32:28,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7e283f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:28, skipping insertion in model container [2023-11-12 02:32:28,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:28" (2/3) ... [2023-11-12 02:32:28,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b7e283f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:28, skipping insertion in model container [2023-11-12 02:32:28,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:28" (3/3) ... [2023-11-12 02:32:28,750 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-1.i [2023-11-12 02:32:28,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:32:28,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-11-12 02:32:28,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:28,845 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;@142d7ddb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:28,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-11-12 02:32:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:32:28,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:28,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:28,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:28,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2023-11-12 02:32:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:28,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411840895] [2023-11-12 02:32:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:28,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411840895] [2023-11-12 02:32:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411840895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:29,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206223513] [2023-11-12 02:32:29,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:29,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:29,221 INFO L87 Difference]: Start difference. First operand has 75 states, 40 states have (on average 2.05) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:29,365 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-11-12 02:32:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:29,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:32:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:29,376 INFO L225 Difference]: With dead ends: 71 [2023-11-12 02:32:29,376 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:32:29,378 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 [2023-11-12 02:32:29,384 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:29,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:32:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-12 02:32:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.864864864864865) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-12 02:32:29,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 4 [2023-11-12 02:32:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:29,431 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-12 02:32:29,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-12 02:32:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 02:32:29,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:29,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:29,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:32:29,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:29,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2023-11-12 02:32:29,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:29,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063861558] [2023-11-12 02:32:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:29,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:29,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:29,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063861558] [2023-11-12 02:32:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063861558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:29,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125649821] [2023-11-12 02:32:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:29,646 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:29,741 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-11-12 02:32:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 02:32:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:29,747 INFO L225 Difference]: With dead ends: 61 [2023-11-12 02:32:29,747 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 02:32:29,751 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 [2023-11-12 02:32:29,753 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:29,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 77 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 02:32:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-12 02:32:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-12 02:32:29,770 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2023-11-12 02:32:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-12 02:32:29,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-12 02:32:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 02:32:29,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:29,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:29,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:32:29,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:29,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash -401980428, now seen corresponding path program 1 times [2023-11-12 02:32:29,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873211243] [2023-11-12 02:32:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873211243] [2023-11-12 02:32:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873211243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:29,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:29,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894257998] [2023-11-12 02:32:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:29,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:29,955 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:30,017 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-11-12 02:32:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 02:32:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:30,023 INFO L225 Difference]: With dead ends: 59 [2023-11-12 02:32:30,023 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 02:32:30,024 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 [2023-11-12 02:32:30,031 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:30,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 84 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:32:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 02:32:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-12 02:32:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-12 02:32:30,039 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 10 [2023-11-12 02:32:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:30,039 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-12 02:32:30,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-12 02:32:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 02:32:30,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:30,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:32:30,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:30,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash -401980427, now seen corresponding path program 1 times [2023-11-12 02:32:30,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:30,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744028766] [2023-11-12 02:32:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:30,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744028766] [2023-11-12 02:32:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744028766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:30,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482075309] [2023-11-12 02:32:30,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:30,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:30,208 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:30,260 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2023-11-12 02:32:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 02:32:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:30,262 INFO L225 Difference]: With dead ends: 57 [2023-11-12 02:32:30,262 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:32:30,263 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 [2023-11-12 02:32:30,264 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 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 [2023-11-12 02:32:30,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:32:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:32:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-12 02:32:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-12 02:32:30,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2023-11-12 02:32:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-12 02:32:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-12 02:32:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 02:32:30,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:30,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:32:30,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:30,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -401981869, now seen corresponding path program 1 times [2023-11-12 02:32:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210966595] [2023-11-12 02:32:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210966595] [2023-11-12 02:32:30,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210966595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6364528] [2023-11-12 02:32:30,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:30,338 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:30,349 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2023-11-12 02:32:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 02:32:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:30,351 INFO L225 Difference]: With dead ends: 65 [2023-11-12 02:32:30,351 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:32:30,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:30,352 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:30,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:32:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:32:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2023-11-12 02:32:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.631578947368421) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-12 02:32:30,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 10 [2023-11-12 02:32:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:30,359 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-12 02:32:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-12 02:32:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 02:32:30,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:30,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:30,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:32:30,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:30,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:30,362 INFO L85 PathProgramCache]: Analyzing trace with hash 243865783, now seen corresponding path program 1 times [2023-11-12 02:32:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774949330] [2023-11-12 02:32:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774949330] [2023-11-12 02:32:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774949330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:30,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:30,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:32:30,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932955794] [2023-11-12 02:32:30,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:30,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:32:30,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:32:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:32:30,551 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:30,679 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-12 02:32:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:32:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 02:32:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:30,682 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:32:30,683 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:32:30,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:32:30,690 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:30,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:32:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-11-12 02:32:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-11-12 02:32:30,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 12 [2023-11-12 02:32:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:30,705 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-11-12 02:32:30,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-11-12 02:32:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 02:32:30,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:30,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:32:30,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:30,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash 243865784, now seen corresponding path program 1 times [2023-11-12 02:32:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932474433] [2023-11-12 02:32:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:30,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:30,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932474433] [2023-11-12 02:32:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932474433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:30,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:30,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907513940] [2023-11-12 02:32:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:32:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:32:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:32:30,977 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-11-12 02:32:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:31,093 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2023-11-12 02:32:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:32:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2023-11-12 02:32:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:31,096 INFO L225 Difference]: With dead ends: 63 [2023-11-12 02:32:31,096 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:32:31,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:31,099 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:31,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 102 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:32:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-11-12 02:32:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-11-12 02:32:31,122 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 12 [2023-11-12 02:32:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:31,122 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-11-12 02:32:31,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2023-11-12 02:32:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-11-12 02:32:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:32:31,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:31,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:31,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:32:31,125 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:31,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash -27720857, now seen corresponding path program 1 times [2023-11-12 02:32:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:31,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006729310] [2023-11-12 02:32:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006729310] [2023-11-12 02:32:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006729310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:31,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635832711] [2023-11-12 02:32:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:31,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:31,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:32:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:31,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:32:31,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:31,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635832711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:31,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-12 02:32:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239092294] [2023-11-12 02:32:31,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:31,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:31,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:31,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:31,493 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) [2023-11-12 02:32:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:31,517 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2023-11-12 02:32:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:31,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) Word has length 16 [2023-11-12 02:32:31,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:31,519 INFO L225 Difference]: With dead ends: 80 [2023-11-12 02:32:31,520 INFO L226 Difference]: Without dead ends: 80 [2023-11-12 02:32:31,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:31,522 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:31,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:32:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-12 02:32:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-11-12 02:32:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.5) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2023-11-12 02:32:31,530 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 16 [2023-11-12 02:32:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:31,531 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2023-11-12 02:32:31,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 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) [2023-11-12 02:32:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2023-11-12 02:32:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:32:31,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:31,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:31,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:31,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:31,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:31,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash -868554549, now seen corresponding path program 1 times [2023-11-12 02:32:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214212878] [2023-11-12 02:32:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:31,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214212878] [2023-11-12 02:32:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214212878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542045853] [2023-11-12 02:32:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:31,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:31,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:31,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:32,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:32:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:32,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:32:32,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:32,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 02:32:32,225 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:32,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:32,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:32,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542045853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:32,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2023-11-12 02:32:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548963663] [2023-11-12 02:32:32,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:32:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:32:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:32:32,371 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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) [2023-11-12 02:32:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:32,498 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-11-12 02:32:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:32:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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) Word has length 18 [2023-11-12 02:32:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:32,500 INFO L225 Difference]: With dead ends: 74 [2023-11-12 02:32:32,500 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 02:32:32,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:32:32,501 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:32,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 126 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 02:32:32,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-12 02:32:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:32,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2023-11-12 02:32:32,505 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 18 [2023-11-12 02:32:32,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:32,506 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2023-11-12 02:32:32,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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) [2023-11-12 02:32:32,506 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2023-11-12 02:32:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 02:32:32,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:32,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:32,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:32,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:32,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash -868554548, now seen corresponding path program 1 times [2023-11-12 02:32:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029142296] [2023-11-12 02:32:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029142296] [2023-11-12 02:32:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029142296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455308768] [2023-11-12 02:32:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:32,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:32,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:32,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:32:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:33,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:32:33,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:33,121 INFO L351 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 [2023-11-12 02:32:33,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 02:32:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:33,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-12 02:32:33,231 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:32:33,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:32:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:33,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:33,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455308768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:33,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:33,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-11-12 02:32:33,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684432799] [2023-11-12 02:32:33,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:33,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:32:33,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:32:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:32:33,539 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:33,819 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2023-11-12 02:32:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:32:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 02:32:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:33,821 INFO L225 Difference]: With dead ends: 72 [2023-11-12 02:32:33,821 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 02:32:33,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:32:33,822 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:33,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 194 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:32:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 02:32:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-12 02:32:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:33,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-11-12 02:32:33,825 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 18 [2023-11-12 02:32:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:33,826 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-11-12 02:32:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-11-12 02:32:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:32:33,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:33,827 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:33,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:34,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:34,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:34,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 140768543, now seen corresponding path program 1 times [2023-11-12 02:32:34,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:34,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848466049] [2023-11-12 02:32:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:32:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848466049] [2023-11-12 02:32:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848466049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:34,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:34,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900531520] [2023-11-12 02:32:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:34,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:32:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:32:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:32:34,254 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:34,431 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2023-11-12 02:32:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:32:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-12 02:32:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:34,432 INFO L225 Difference]: With dead ends: 88 [2023-11-12 02:32:34,433 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:32:34,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:32:34,434 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:34,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 86 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:32:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2023-11-12 02:32:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-11-12 02:32:34,437 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2023-11-12 02:32:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:34,438 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-11-12 02:32:34,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-11-12 02:32:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:32:34,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:34,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:34,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:32:34,440 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:34,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 140768544, now seen corresponding path program 1 times [2023-11-12 02:32:34,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:34,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178026778] [2023-11-12 02:32:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:34,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:32:34,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:34,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178026778] [2023-11-12 02:32:34,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178026778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:34,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:34,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:32:34,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472027652] [2023-11-12 02:32:34,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:34,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:32:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:32:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:32:34,867 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2023-11-12 02:32:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:35,046 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-11-12 02:32:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:32:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) Word has length 37 [2023-11-12 02:32:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:35,048 INFO L225 Difference]: With dead ends: 76 [2023-11-12 02:32:35,048 INFO L226 Difference]: Without dead ends: 76 [2023-11-12 02:32:35,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:32:35,049 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:35,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 97 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-12 02:32:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-11-12 02:32:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-12 02:32:35,052 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 37 [2023-11-12 02:32:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:35,052 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-12 02:32:35,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2023-11-12 02:32:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-12 02:32:35,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:32:35,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:35,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:35,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:32:35,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:35,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1747626347, now seen corresponding path program 1 times [2023-11-12 02:32:35,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:35,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362568873] [2023-11-12 02:32:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:36,118 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:32:36,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362568873] [2023-11-12 02:32:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362568873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666156497] [2023-11-12 02:32:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:36,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:36,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:36,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:32:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:36,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 02:32:36,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:36,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 02:32:36,630 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:32:36,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:32:36,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:36,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:36,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:36,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-12 02:32:36,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:32:37,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:37,173 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_912 Int) (v_ArrVal_909 (Array Int Int)) (|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= |c_ULTIMATE.start_main_~data_init~0#1| (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_909))) (store .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) v_ArrVal_912))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2023-11-12 02:32:37,183 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:37,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2023-11-12 02:32:37,197 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:37,198 INFO L351 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 146 treesize of output 144 [2023-11-12 02:32:37,209 INFO L351 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 154 treesize of output 146 [2023-11-12 02:32:37,525 INFO L351 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 39 treesize of output 33 [2023-11-12 02:32:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2023-11-12 02:32:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666156497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:37,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2023-11-12 02:32:37,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751369146] [2023-11-12 02:32:37,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:37,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:32:37,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:32:37,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=778, Unknown=1, NotChecked=56, Total=930 [2023-11-12 02:32:37,913 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:38,696 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2023-11-12 02:32:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:32:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-12 02:32:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:38,697 INFO L225 Difference]: With dead ends: 72 [2023-11-12 02:32:38,697 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 02:32:38,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1446, Unknown=1, NotChecked=80, Total=1806 [2023-11-12 02:32:38,699 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:38,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 503 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 497 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2023-11-12 02:32:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 02:32:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-12 02:32:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-11-12 02:32:38,702 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 40 [2023-11-12 02:32:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:38,702 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-11-12 02:32:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-11-12 02:32:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:32:38,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:38,704 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:38,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:38,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:38,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:38,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:38,905 INFO L85 PathProgramCache]: Analyzing trace with hash -56889687, now seen corresponding path program 1 times [2023-11-12 02:32:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675794776] [2023-11-12 02:32:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:38,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:32:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675794776] [2023-11-12 02:32:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675794776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:39,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:39,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:32:39,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867013077] [2023-11-12 02:32:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:39,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:32:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:32:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:32:39,150 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 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) [2023-11-12 02:32:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:39,340 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2023-11-12 02:32:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:32:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-12 02:32:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:39,341 INFO L225 Difference]: With dead ends: 92 [2023-11-12 02:32:39,341 INFO L226 Difference]: Without dead ends: 92 [2023-11-12 02:32:39,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:32:39,342 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:39,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 94 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-12 02:32:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2023-11-12 02:32:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.25) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-12 02:32:39,345 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 43 [2023-11-12 02:32:39,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:39,346 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-12 02:32:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 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) [2023-11-12 02:32:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-12 02:32:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:32:39,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:39,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:39,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:32:39,347 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:39,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -56889686, now seen corresponding path program 1 times [2023-11-12 02:32:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:39,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48078102] [2023-11-12 02:32:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:32:39,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48078102] [2023-11-12 02:32:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48078102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:39,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:39,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:32:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864730311] [2023-11-12 02:32:39,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:39,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:32:39,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:32:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:32:39,730 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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) [2023-11-12 02:32:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:39,927 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2023-11-12 02:32:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:32:39,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-12 02:32:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:39,928 INFO L225 Difference]: With dead ends: 74 [2023-11-12 02:32:39,928 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 02:32:39,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:32:39,929 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 72 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:39,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 90 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:32:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 02:32:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-11-12 02:32:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-11-12 02:32:39,932 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 43 [2023-11-12 02:32:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:39,932 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-11-12 02:32:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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) [2023-11-12 02:32:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-11-12 02:32:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:32:39,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:39,933 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:32:39,934 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:39,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash -56889649, now seen corresponding path program 1 times [2023-11-12 02:32:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111930520] [2023-11-12 02:32:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:32:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111930520] [2023-11-12 02:32:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111930520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:41,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4392028] [2023-11-12 02:32:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:41,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:41,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:32:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:41,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-12 02:32:41,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:41,584 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:41,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:41,606 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 02:32:41,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 02:32:41,709 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-12 02:32:41,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-12 02:32:41,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:41,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:41,818 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:32:41,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-12 02:32:41,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2023-11-12 02:32:41,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-12 02:32:42,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-12 02:32:42,065 INFO L351 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 25 treesize of output 13 [2023-11-12 02:32:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:32:42,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:42,295 INFO L322 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2023-11-12 02:32:42,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-12 02:32:42,303 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1393 (Array Int Int)) (v_ArrVal_1392 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1392) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1393) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) is different from false [2023-11-12 02:32:42,317 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1393 (Array Int Int)) (v_ArrVal_1392 (Array Int Int)) (v_ArrVal_1391 (Array Int Int))) (or (= (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| v_ArrVal_1391) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_1392) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_1393) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| (select v_ArrVal_1391 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) v_ArrVal_1391)))) is different from false [2023-11-12 02:32:42,328 INFO L351 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 142 treesize of output 140 [2023-11-12 02:32:42,336 INFO L351 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 16 [2023-11-12 02:32:42,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:32:42,613 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:32:42,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 02:32:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2023-11-12 02:32:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4392028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:42,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 15] total 39 [2023-11-12 02:32:42,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463493449] [2023-11-12 02:32:42,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-12 02:32:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-12 02:32:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1262, Unknown=10, NotChecked=146, Total=1560 [2023-11-12 02:32:42,633 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:43,825 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2023-11-12 02:32:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:32:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-12 02:32:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:43,827 INFO L225 Difference]: With dead ends: 97 [2023-11-12 02:32:43,827 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 02:32:43,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=328, Invalid=2022, Unknown=10, NotChecked=190, Total=2550 [2023-11-12 02:32:43,829 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:43,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 337 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 719 Invalid, 0 Unknown, 146 Unchecked, 0.6s Time] [2023-11-12 02:32:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 02:32:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2023-11-12 02:32:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 63 states have (on average 1.253968253968254) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-12 02:32:43,832 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 43 [2023-11-12 02:32:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-12 02:32:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-12 02:32:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:32:43,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:43,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:43,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:32:44,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:44,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:44,041 INFO L85 PathProgramCache]: Analyzing trace with hash -56889648, now seen corresponding path program 1 times [2023-11-12 02:32:44,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:44,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947662200] [2023-11-12 02:32:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:44,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:46,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947662200] [2023-11-12 02:32:46,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947662200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892895481] [2023-11-12 02:32:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:46,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:46,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:46,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:32:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:46,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-12 02:32:46,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:46,415 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:32:46,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-12 02:32:46,452 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 02:32:46,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 02:32:46,582 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-12 02:32:46,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-11-12 02:32:46,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:46,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:46,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:46,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:46,800 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:32:46,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-12 02:32:46,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-12 02:32:46,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2023-11-12 02:32:46,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:47,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-12 02:32:47,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:32:47,221 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:47,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-12 02:32:47,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-12 02:32:47,249 INFO L351 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 25 treesize of output 13 [2023-11-12 02:32:47,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 02:32:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:32:47,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:32:47,798 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:32:47,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2023-11-12 02:32:48,163 INFO L351 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 142 treesize of output 140 [2023-11-12 02:32:48,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-12 02:32:48,187 INFO L351 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 16 [2023-11-12 02:32:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:48,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-12 02:32:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:48,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 1 [2023-11-12 02:32:48,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:48,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:32:48,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-12 02:32:48,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 1 [2023-11-12 02:32:48,737 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 02:32:48,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-12 02:32:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:32:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892895481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:32:48,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:32:48,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 47 [2023-11-12 02:32:48,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768575982] [2023-11-12 02:32:48,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:32:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 02:32:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 02:32:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2078, Unknown=4, NotChecked=0, Total=2256 [2023-11-12 02:32:48,794 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:51,552 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-11-12 02:32:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:32:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-12 02:32:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:51,554 INFO L225 Difference]: With dead ends: 111 [2023-11-12 02:32:51,554 INFO L226 Difference]: Without dead ends: 111 [2023-11-12 02:32:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=572, Invalid=3980, Unknown=4, NotChecked=0, Total=4556 [2023-11-12 02:32:51,557 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 210 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:51,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 371 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:32:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-12 02:32:51,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2023-11-12 02:32:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-12 02:32:51,561 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 43 [2023-11-12 02:32:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:51,561 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-12 02:32:51,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 48 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-12 02:32:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:32:51,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:51,562 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:51,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:32:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:51,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:51,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479191, now seen corresponding path program 1 times [2023-11-12 02:32:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85423116] [2023-11-12 02:32:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:32:52,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85423116] [2023-11-12 02:32:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85423116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:52,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:52,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-12 02:32:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529484087] [2023-11-12 02:32:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:52,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:32:52,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:32:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:32:52,633 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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) [2023-11-12 02:32:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:53,092 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2023-11-12 02:32:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:32:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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) Word has length 46 [2023-11-12 02:32:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:53,093 INFO L225 Difference]: With dead ends: 98 [2023-11-12 02:32:53,093 INFO L226 Difference]: Without dead ends: 98 [2023-11-12 02:32:53,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:32:53,094 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:53,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 152 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:32:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-12 02:32:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2023-11-12 02:32:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:32:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2023-11-12 02:32:53,101 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 46 [2023-11-12 02:32:53,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:53,101 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2023-11-12 02:32:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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) [2023-11-12 02:32:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2023-11-12 02:32:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:32:53,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:53,104 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:53,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:32:53,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:53,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1711479192, now seen corresponding path program 1 times [2023-11-12 02:32:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12617314] [2023-11-12 02:32:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:32:54,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12617314] [2023-11-12 02:32:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12617314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486714406] [2023-11-12 02:32:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:54,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:54,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:54,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:54,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:32:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:54,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 02:32:54,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:54,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:32:54,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:32:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:54,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-12 02:32:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:54,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2023-11-12 02:32:54,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-12 02:32:54,930 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-12 02:32:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 02:32:54,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:32:54,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486714406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:54,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:32:54,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 27 [2023-11-12 02:32:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233558241] [2023-11-12 02:32:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:32:54,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:32:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:32:54,996 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 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) [2023-11-12 02:32:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:32:55,466 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2023-11-12 02:32:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:32:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 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) Word has length 46 [2023-11-12 02:32:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:32:55,467 INFO L225 Difference]: With dead ends: 94 [2023-11-12 02:32:55,468 INFO L226 Difference]: Without dead ends: 94 [2023-11-12 02:32:55,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:32:55,469 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:32:55,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:32:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-12 02:32:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2023-11-12 02:32:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 78 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) [2023-11-12 02:32:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2023-11-12 02:32:55,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 46 [2023-11-12 02:32:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:32:55,474 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2023-11-12 02:32:55,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 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) [2023-11-12 02:32:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2023-11-12 02:32:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:32:55,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:32:55,475 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:55,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:32:55,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:55,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-11-12 02:32:55,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1712591291, now seen corresponding path program 1 times [2023-11-12 02:32:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:55,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312297820] [2023-11-12 02:32:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312297820] [2023-11-12 02:32:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312297820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:32:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273585012] [2023-11-12 02:32:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:58,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:32:58,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:58,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:32:58,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b47e2cf-7a92-4183-820f-13a5215e1c74/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:32:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:58,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-12 02:32:58,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:32:58,898 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-12 02:32:58,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-12 02:32:59,019 INFO L322 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-11-12 02:32:59,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2023-11-12 02:32:59,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:59,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:59,343 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-12 02:32:59,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-12 02:32:59,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:32:59,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:59,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2023-11-12 02:32:59,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:59,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-12 02:32:59,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-12 02:32:59,587 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-12 02:32:59,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 74 [2023-11-12 02:32:59,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-11-12 02:32:59,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-12 02:32:59,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2023-11-12 02:32:59,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-12 02:32:59,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:32:59,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:32:59,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-12 02:32:59,854 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:32:59,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 33 [2023-11-12 02:32:59,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:33:00,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:33:00,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-12 02:33:00,363 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:33:00,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 50 [2023-11-12 02:33:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:33:00,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-12 02:33:00,439 INFO L322 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-11-12 02:33:00,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 46 [2023-11-12 02:33:00,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-12 02:33:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:33:00,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:05,298 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:33:05,299 INFO L351 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 1443 treesize of output 1441 [2023-11-12 02:33:05,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:33:05,402 INFO L351 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 25734 treesize of output 25612 [2023-11-12 02:33:05,481 INFO L351 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 577 treesize of output 545 [2023-11-12 02:33:05,506 INFO L351 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 502 treesize of output 478 [2023-11-12 02:33:05,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:33:06,309 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:33:06,310 INFO L351 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 1138 treesize of output 1140 [2023-11-12 02:33:06,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:33:06,379 INFO L351 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 26987 treesize of output 26849 [2023-11-12 02:33:06,488 INFO L351 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 436 treesize of output 420 [2023-11-12 02:33:06,507 INFO L351 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 663 treesize of output 623 [2023-11-12 02:33:06,597 INFO L173 IndexEqualityManager]: detected equality via solver