./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/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_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/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_7230a814-cdd9-41fe-a12a-173926c7e0bb/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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:40,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:40,420 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:08:40,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:40,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:40,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:40,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:40,461 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:40,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:40,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:40,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:40,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:40,466 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:40,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:40,468 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:40,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:40,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:40,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:40,471 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:08:40,471 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:08:40,472 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:08:40,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:40,474 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:08:40,474 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:08:40,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:40,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:40,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:40,477 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:40,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:40,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:40,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:40,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:40,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:40,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:40,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:40,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:40,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:40,482 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:40,483 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_7230a814-cdd9-41fe-a12a-173926c7e0bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2023-11-12 02:08:40,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:40,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:40,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:40,823 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:40,825 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:40,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-12 02:08:44,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:44,517 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:44,518 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2023-11-12 02:08:44,540 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/data/c157e1f89/ebe20c9ae1c7498fab66eb19f13b9906/FLAGd52f983ee [2023-11-12 02:08:44,559 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/data/c157e1f89/ebe20c9ae1c7498fab66eb19f13b9906 [2023-11-12 02:08:44,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:44,564 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:44,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:44,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:44,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:44,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:44" (1/1) ... [2023-11-12 02:08:44,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6ad177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:44, skipping insertion in model container [2023-11-12 02:08:44,576 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:44" (1/1) ... [2023-11-12 02:08:44,649 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:45,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:45,160 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:45,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:45,283 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:45,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45 WrapperNode [2023-11-12 02:08:45,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:45,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:45,286 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:45,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:45,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,316 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,356 INFO L138 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 313 [2023-11-12 02:08:45,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:45,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:45,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:45,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:45,370 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,399 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:45,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:45,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:45,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:45,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (1/1) ... [2023-11-12 02:08:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:45,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:45,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:08:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:08:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:08:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:08:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:08:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:08:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure append [2023-11-12 02:08:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2023-11-12 02:08:45,658 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:45,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:46,844 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:46,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:46,868 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 02:08:46,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:46 BoogieIcfgContainer [2023-11-12 02:08:46,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:46,874 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:46,874 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:46,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:46,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:44" (1/3) ... [2023-11-12 02:08:46,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580e4ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:46, skipping insertion in model container [2023-11-12 02:08:46,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:45" (2/3) ... [2023-11-12 02:08:46,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580e4ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:46, skipping insertion in model container [2023-11-12 02:08:46,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:46" (3/3) ... [2023-11-12 02:08:46,888 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2023-11-12 02:08:46,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:46,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2023-11-12 02:08:47,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:47,009 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;@62dca27d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:47,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2023-11-12 02:08:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 326 states, 162 states have (on average 2.117283950617284) internal successors, (343), 311 states have internal predecessors, (343), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 02:08:47,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:47,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 02:08:47,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:47,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:47,042 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-11-12 02:08:47,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:47,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040504612] [2023-11-12 02:08:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:47,316 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 02:08:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040504612] [2023-11-12 02:08:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040504612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:47,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:47,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:47,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68129803] [2023-11-12 02:08:47,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:47,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:47,398 INFO L87 Difference]: Start difference. First operand has 326 states, 162 states have (on average 2.117283950617284) internal successors, (343), 311 states have internal predecessors, (343), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 02:08:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:48,159 INFO L93 Difference]: Finished difference Result 551 states and 604 transitions. [2023-11-12 02:08:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:48,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-12 02:08:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:48,188 INFO L225 Difference]: With dead ends: 551 [2023-11-12 02:08:48,188 INFO L226 Difference]: Without dead ends: 549 [2023-11-12 02:08:48,191 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 02:08:48,199 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 246 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:48,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 453 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:08:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-11-12 02:08:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 410. [2023-11-12 02:08:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 249 states have (on average 2.076305220883534) internal successors, (517), 395 states have internal predecessors, (517), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2023-11-12 02:08:48,303 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 3 [2023-11-12 02:08:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:48,303 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2023-11-12 02:08:48,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 02:08:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2023-11-12 02:08:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 02:08:48,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:48,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 02:08:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:08:48,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:48,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-11-12 02:08:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:48,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504790022] [2023-11-12 02:08:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:48,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:48,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:48,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504790022] [2023-11-12 02:08:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504790022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:48,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:48,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824348272] [2023-11-12 02:08:48,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:48,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:48,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:48,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:48,419 INFO L87 Difference]: Start difference. First operand 410 states and 547 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 02:08:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:48,689 INFO L93 Difference]: Finished difference Result 411 states and 550 transitions. [2023-11-12 02:08:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-12 02:08:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:48,694 INFO L225 Difference]: With dead ends: 411 [2023-11-12 02:08:48,694 INFO L226 Difference]: Without dead ends: 411 [2023-11-12 02:08:48,694 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 02:08:48,697 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 6 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:48,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:08:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-11-12 02:08:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 408. [2023-11-12 02:08:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 249 states have (on average 2.068273092369478) internal successors, (515), 393 states have internal predecessors, (515), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 545 transitions. [2023-11-12 02:08:48,726 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 545 transitions. Word has length 3 [2023-11-12 02:08:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:48,727 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 545 transitions. [2023-11-12 02:08:48,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 02:08:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 545 transitions. [2023-11-12 02:08:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 02:08:48,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:48,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:08:48,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:48,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1117389169, now seen corresponding path program 1 times [2023-11-12 02:08:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:48,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837788326] [2023-11-12 02:08:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:48,917 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 02:08:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837788326] [2023-11-12 02:08:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837788326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768260715] [2023-11-12 02:08:48,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:48,921 INFO L87 Difference]: Start difference. First operand 408 states and 545 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:49,256 INFO L93 Difference]: Finished difference Result 403 states and 540 transitions. [2023-11-12 02:08:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 02:08:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:49,261 INFO L225 Difference]: With dead ends: 403 [2023-11-12 02:08:49,261 INFO L226 Difference]: Without dead ends: 403 [2023-11-12 02:08:49,261 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 02:08:49,263 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 43 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:49,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 502 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:08:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-11-12 02:08:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2023-11-12 02:08:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 249 states have (on average 2.0481927710843375) internal successors, (510), 388 states have internal predecessors, (510), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 540 transitions. [2023-11-12 02:08:49,290 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 540 transitions. Word has length 10 [2023-11-12 02:08:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:49,291 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 540 transitions. [2023-11-12 02:08:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 540 transitions. [2023-11-12 02:08:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 02:08:49,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:49,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:49,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:08:49,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:49,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1117389170, now seen corresponding path program 1 times [2023-11-12 02:08:49,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234052657] [2023-11-12 02:08:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:49,479 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 02:08:49,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:49,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234052657] [2023-11-12 02:08:49,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234052657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:49,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:49,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:49,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492273609] [2023-11-12 02:08:49,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:49,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:49,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:49,482 INFO L87 Difference]: Start difference. First operand 403 states and 540 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:49,792 INFO L93 Difference]: Finished difference Result 398 states and 535 transitions. [2023-11-12 02:08:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 02:08:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:49,797 INFO L225 Difference]: With dead ends: 398 [2023-11-12 02:08:49,797 INFO L226 Difference]: Without dead ends: 398 [2023-11-12 02:08:49,797 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 02:08:49,799 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 38 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 515 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:08:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-12 02:08:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2023-11-12 02:08:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 249 states have (on average 2.0281124497991967) internal successors, (505), 383 states have internal predecessors, (505), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 535 transitions. [2023-11-12 02:08:49,819 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 535 transitions. Word has length 10 [2023-11-12 02:08:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:49,819 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 535 transitions. [2023-11-12 02:08:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 535 transitions. [2023-11-12 02:08:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:08:49,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:49,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:49,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:08:49,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash 279326295, now seen corresponding path program 1 times [2023-11-12 02:08:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029014303] [2023-11-12 02:08:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:50,072 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 02:08:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:50,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029014303] [2023-11-12 02:08:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029014303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:08:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868293884] [2023-11-12 02:08:50,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:08:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:08:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:08:50,077 INFO L87 Difference]: Start difference. First operand 398 states and 535 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:50,838 INFO L93 Difference]: Finished difference Result 526 states and 577 transitions. [2023-11-12 02:08:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:08:50,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:08:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:50,843 INFO L225 Difference]: With dead ends: 526 [2023-11-12 02:08:50,844 INFO L226 Difference]: Without dead ends: 526 [2023-11-12 02:08:50,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:08:50,845 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 350 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:50,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 650 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:08:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-12 02:08:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 390. [2023-11-12 02:08:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 249 states have (on average 1.9959839357429718) internal successors, (497), 375 states have internal predecessors, (497), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 527 transitions. [2023-11-12 02:08:50,875 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 527 transitions. Word has length 11 [2023-11-12 02:08:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:50,876 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 527 transitions. [2023-11-12 02:08:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 527 transitions. [2023-11-12 02:08:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 02:08:50,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:50,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:08:50,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:50,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash 279326296, now seen corresponding path program 1 times [2023-11-12 02:08:50,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:50,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893872030] [2023-11-12 02:08:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:50,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:51,265 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 02:08:51,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893872030] [2023-11-12 02:08:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893872030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:51,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:51,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:08:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544982183] [2023-11-12 02:08:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:08:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:08:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:08:51,269 INFO L87 Difference]: Start difference. First operand 390 states and 527 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:52,289 INFO L93 Difference]: Finished difference Result 516 states and 567 transitions. [2023-11-12 02:08:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:08:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 02:08:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:52,294 INFO L225 Difference]: With dead ends: 516 [2023-11-12 02:08:52,294 INFO L226 Difference]: Without dead ends: 516 [2023-11-12 02:08:52,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:08:52,296 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 809 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:52,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 449 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:08:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-11-12 02:08:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 381. [2023-11-12 02:08:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 249 states have (on average 1.9558232931726907) internal successors, (487), 366 states have internal predecessors, (487), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:08:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 517 transitions. [2023-11-12 02:08:52,314 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 517 transitions. Word has length 11 [2023-11-12 02:08:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:52,315 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 517 transitions. [2023-11-12 02:08:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 517 transitions. [2023-11-12 02:08:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 02:08:52,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:52,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:52,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:08:52,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:52,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1999087244, now seen corresponding path program 1 times [2023-11-12 02:08:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927106835] [2023-11-12 02:08:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:52,865 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 02:08:52,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927106835] [2023-11-12 02:08:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927106835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:52,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:08:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704730375] [2023-11-12 02:08:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:08:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:08:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:08:52,869 INFO L87 Difference]: Start difference. First operand 381 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:53,351 INFO L93 Difference]: Finished difference Result 401 states and 540 transitions. [2023-11-12 02:08:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:08:53,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-12 02:08:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:53,354 INFO L225 Difference]: With dead ends: 401 [2023-11-12 02:08:53,355 INFO L226 Difference]: Without dead ends: 401 [2023-11-12 02:08:53,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:08:53,356 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 20 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1869 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:53,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1869 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:08:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-12 02:08:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 389. [2023-11-12 02:08:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 256 states have (on average 1.93359375) internal successors, (495), 373 states have internal predecessors, (495), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:08:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2023-11-12 02:08:53,371 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 20 [2023-11-12 02:08:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:53,371 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2023-11-12 02:08:53,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2023-11-12 02:08:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 02:08:53,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:53,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:53,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:08:53,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:53,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash -661228401, now seen corresponding path program 1 times [2023-11-12 02:08:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738399281] [2023-11-12 02:08:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:53,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:53,941 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 02:08:53,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738399281] [2023-11-12 02:08:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738399281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:53,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:08:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769642836] [2023-11-12 02:08:53,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:53,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:08:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:08:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:08:53,945 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:54,953 INFO L93 Difference]: Finished difference Result 529 states and 582 transitions. [2023-11-12 02:08:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:08:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-12 02:08:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:54,958 INFO L225 Difference]: With dead ends: 529 [2023-11-12 02:08:54,958 INFO L226 Difference]: Without dead ends: 529 [2023-11-12 02:08:54,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:08:54,960 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 754 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:54,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1537 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:08:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-11-12 02:08:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 392. [2023-11-12 02:08:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 259 states have (on average 1.9227799227799227) internal successors, (498), 376 states have internal predecessors, (498), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:08:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 530 transitions. [2023-11-12 02:08:54,982 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 530 transitions. Word has length 22 [2023-11-12 02:08:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:54,982 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 530 transitions. [2023-11-12 02:08:54,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:08:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 530 transitions. [2023-11-12 02:08:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 02:08:54,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:54,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:54,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:08:54,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:08:54,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash -614318820, now seen corresponding path program 1 times [2023-11-12 02:08:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:54,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941784872] [2023-11-12 02:08:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:56,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:08:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:56,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:56,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941784872] [2023-11-12 02:08:56,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941784872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:08:56,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831402278] [2023-11-12 02:08:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:56,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:56,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:56,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:08:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:57,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 02:08:57,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:57,149 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 02:08:57,575 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 13 treesize of output 9 [2023-11-12 02:08:57,703 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:08:57,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-12 02:08:57,721 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 02:08:57,865 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:08:57,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-11-12 02:08:57,913 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-12 02:08:58,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:08:58,138 INFO L322 Elim1Store]: treesize reduction 18, result has 30.8 percent of original size [2023-11-12 02:08:58,139 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 25 treesize of output 24 [2023-11-12 02:08:58,364 INFO L322 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2023-11-12 02:08:58,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-11-12 02:08:58,460 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 34 treesize of output 25 [2023-11-12 02:08:58,619 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 34 treesize of output 25 [2023-11-12 02:08:58,678 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 34 treesize of output 25 [2023-11-12 02:08:58,737 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 02:08:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:08:58,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:03,371 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:03,372 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 33 treesize of output 34 [2023-11-12 02:09:03,394 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:03,394 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 332 treesize of output 214 [2023-11-12 02:09:03,412 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 41 treesize of output 37 [2023-11-12 02:09:03,425 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 44 treesize of output 36 [2023-11-12 02:09:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831402278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:03,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:09:03,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-11-12 02:09:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299701847] [2023-11-12 02:09:03,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 02:09:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 02:09:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=819, Unknown=11, NotChecked=0, Total=930 [2023-11-12 02:09:03,907 INFO L87 Difference]: Start difference. First operand 392 states and 530 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:09:06,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:09:08,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 02:09:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:12,412 INFO L93 Difference]: Finished difference Result 532 states and 584 transitions. [2023-11-12 02:09:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:09:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-11-12 02:09:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:12,418 INFO L225 Difference]: With dead ends: 532 [2023-11-12 02:09:12,418 INFO L226 Difference]: Without dead ends: 532 [2023-11-12 02:09:12,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=259, Invalid=1370, Unknown=11, NotChecked=0, Total=1640 [2023-11-12 02:09:12,421 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1113 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 119 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:12,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 2684 Invalid, 2588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [119 Valid, 2467 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-11-12 02:09:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-11-12 02:09:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 397. [2023-11-12 02:09:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 264 states have (on average 1.9015151515151516) internal successors, (502), 381 states have internal predecessors, (502), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:09:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2023-11-12 02:09:12,442 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 38 [2023-11-12 02:09:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:12,443 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2023-11-12 02:09:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 23 states have internal predecessors, (65), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:09:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2023-11-12 02:09:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 02:09:12,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:12,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:12,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:12,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2023-11-12 02:09:12,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -614318819, now seen corresponding path program 1 times [2023-11-12 02:09:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482295952] [2023-11-12 02:09:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:14,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-12 02:09:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482295952] [2023-11-12 02:09:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482295952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70306800] [2023-11-12 02:09:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:15,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:15,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:09:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:15,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-12 02:09:15,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:16,002 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 02:09:16,533 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 13 treesize of output 9 [2023-11-12 02:09:16,541 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 13 treesize of output 9 [2023-11-12 02:09:16,705 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:09:16,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-12 02:09:16,736 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:09:16,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-12 02:09:16,760 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 02:09:16,774 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 02:09:16,999 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:09:17,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2023-11-12 02:09:17,030 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-12 02:09:17,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-11-12 02:09:17,091 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-12 02:09:17,164 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-12 02:09:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:09:17,480 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 02:09:17,481 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 29 treesize of output 28 [2023-11-12 02:09:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:09:17,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 23 [2023-11-12 02:09:17,959 INFO L322 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2023-11-12 02:09:17,960 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 22 treesize of output 24 [2023-11-12 02:09:18,125 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 48 treesize of output 39 [2023-11-12 02:09:18,133 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 37 treesize of output 30 [2023-11-12 02:09:18,363 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 48 treesize of output 39 [2023-11-12 02:09:18,373 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 37 treesize of output 30 [2023-11-12 02:09:18,458 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 48 treesize of output 39 [2023-11-12 02:09:18,466 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 37 treesize of output 30 [2023-11-12 02:09:18,614 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:09:18,617 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2023-11-12 02:09:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:09:18,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2023-11-12 02:09:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:18,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:19,967 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:19,967 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 102 treesize of output 103 [2023-11-12 02:09:19,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:19,990 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 122 treesize of output 113 [2023-11-12 02:09:20,013 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:20,015 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 480 treesize of output 344 [2023-11-12 02:09:20,049 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:20,050 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 1058 treesize of output 994 [2023-11-12 02:09:20,174 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:09:20,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 267 treesize of output 317 [2023-11-12 02:09:20,207 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 239 treesize of output 227 [2023-11-12 02:09:20,235 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 268 treesize of output 248 [2023-11-12 02:09:20,262 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 219 treesize of output 203 [2023-11-12 02:09:20,289 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 240 treesize of output 212 [2023-11-12 02:09:20,323 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 187 treesize of output 179 [2023-11-12 02:09:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70306800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:21,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:09:21,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 30 [2023-11-12 02:09:21,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383073910] [2023-11-12 02:09:21,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:21,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 02:09:21,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:21,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 02:09:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1197, Unknown=13, NotChecked=0, Total=1332 [2023-11-12 02:09:21,797 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:09:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:29,359 INFO L93 Difference]: Finished difference Result 531 states and 583 transitions. [2023-11-12 02:09:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:09:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2023-11-12 02:09:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:29,365 INFO L225 Difference]: With dead ends: 531 [2023-11-12 02:09:29,365 INFO L226 Difference]: Without dead ends: 531 [2023-11-12 02:09:29,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=309, Invalid=2030, Unknown=13, NotChecked=0, Total=2352 [2023-11-12 02:09:29,368 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 921 mSDsluCounter, 2238 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 2383 SdHoareTripleChecker+Invalid, 3960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:29,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 2383 Invalid, 3960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-12 02:09:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-12 02:09:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 396. [2023-11-12 02:09:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 264 states have (on average 1.8977272727272727) internal successors, (501), 380 states have internal predecessors, (501), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-12 02:09:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 533 transitions. [2023-11-12 02:09:29,386 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 533 transitions. Word has length 38 [2023-11-12 02:09:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:29,387 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 533 transitions. [2023-11-12 02:09:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:09:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 533 transitions. [2023-11-12 02:09:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-12 02:09:29,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:29,397 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:29,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7230a814-cdd9-41fe-a12a-173926c7e0bb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0