./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd --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 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:44:11,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:44:11,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 12:44:11,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:44:11,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:44:11,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:44:11,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:44:11,397 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:44:11,398 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:44:11,398 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:44:11,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:44:11,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:44:11,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:44:11,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:44:11,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:44:11,400 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:44:11,402 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:44:11,403 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:44:11,403 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:44:11,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:44:11,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:44:11,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:11,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:44:11,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:44:11,404 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:44:11,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:44:11,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:44:11,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:44:11,405 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:44:11,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:44:11,405 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd 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 -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2024-11-13 12:44:11,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:44:11,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:44:11,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:44:11,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:44:11,751 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:44:11,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-memsafety/substring-alloca-2.i Unable to find full path for "g++" [2024-11-13 12:44:13,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:44:14,140 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:44:14,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2024-11-13 12:44:14,153 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/data/15ce4f41d/2d1de72d93fe4c74a594d4f1d359d70d/FLAG2d17cdab3 [2024-11-13 12:44:14,170 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/data/15ce4f41d/2d1de72d93fe4c74a594d4f1d359d70d [2024-11-13 12:44:14,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:44:14,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:44:14,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:14,176 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:44:14,181 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:44:14,182 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37cddaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14, skipping insertion in model container [2024-11-13 12:44:14,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,210 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:44:14,560 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 12:44:14,563 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 12:44:14,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:14,582 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:44:14,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:44:14,664 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:44:14,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14 WrapperNode [2024-11-13 12:44:14,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:44:14,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:14,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:44:14,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:44:14,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,711 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 106 [2024-11-13 12:44:14,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:44:14,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:44:14,713 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:44:14,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:44:14,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,740 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [4, 5]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-13 12:44:14,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,740 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,752 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,753 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:44:14,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:44:14,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:44:14,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:44:14,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (1/1) ... [2024-11-13 12:44:14,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:14,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:44:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:44:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 12:44:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 12:44:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 12:44:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 12:44:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 12:44:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 12:44:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:44:14,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:44:14,992 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:44:14,995 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:44:15,310 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-11-13 12:44:15,310 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:44:15,331 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:44:15,331 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 12:44:15,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:15 BoogieIcfgContainer [2024-11-13 12:44:15,331 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:44:15,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:44:15,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:44:15,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:44:15,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:44:14" (1/3) ... [2024-11-13 12:44:15,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6c3d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:15, skipping insertion in model container [2024-11-13 12:44:15,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:44:14" (2/3) ... [2024-11-13 12:44:15,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6c3d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:44:15, skipping insertion in model container [2024-11-13 12:44:15,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:44:15" (3/3) ... [2024-11-13 12:44:15,345 INFO L112 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2024-11-13 12:44:15,365 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:44:15,367 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG substring-alloca-2.i that has 1 procedures, 51 locations, 1 initial locations, 4 loop locations, and 19 error locations. [2024-11-13 12:44:15,430 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:44:15,446 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@515bc1d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:44:15,447 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-13 12:44:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 31 states have (on average 2.0) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:15,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:15,463 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:15,464 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:15,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:15,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-13 12:44:15,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:15,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600483747] [2024-11-13 12:44:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:15,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600483747] [2024-11-13 12:44:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600483747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:15,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:15,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169265086] [2024-11-13 12:44:15,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:15,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:15,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:15,918 INFO L87 Difference]: Start difference. First operand has 51 states, 31 states have (on average 2.0) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:16,021 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-11-13 12:44:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 12:44:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:16,033 INFO L225 Difference]: With dead ends: 63 [2024-11-13 12:44:16,034 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 12:44:16,037 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:16,043 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:16,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 148 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 12:44:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2024-11-13 12:44:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-13 12:44:16,103 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 7 [2024-11-13 12:44:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:16,103 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-13 12:44:16,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-13 12:44:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:16,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:16,104 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:16,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:44:16,105 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:16,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2024-11-13 12:44:16,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383570152] [2024-11-13 12:44:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:16,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:16,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383570152] [2024-11-13 12:44:16,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383570152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:16,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:16,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655878369] [2024-11-13 12:44:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:16,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:16,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:16,358 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:16,429 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-11-13 12:44:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 12:44:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:16,430 INFO L225 Difference]: With dead ends: 50 [2024-11-13 12:44:16,430 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 12:44:16,431 INFO L431 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 [2024-11-13 12:44:16,432 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:16,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 12:44:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 12:44:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-13 12:44:16,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2024-11-13 12:44:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:16,439 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-13 12:44:16,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-13 12:44:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 12:44:16,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:16,439 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:16,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:44:16,440 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:16,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-13 12:44:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870019489] [2024-11-13 12:44:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:16,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870019489] [2024-11-13 12:44:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870019489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:16,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:16,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266646818] [2024-11-13 12:44:16,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:16,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:16,868 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:17,024 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-13 12:44:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 12:44:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:17,026 INFO L225 Difference]: With dead ends: 53 [2024-11-13 12:44:17,026 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 12:44:17,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:17,029 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:17,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 112 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:17,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 12:44:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-13 12:44:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-13 12:44:17,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 7 [2024-11-13 12:44:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:17,039 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-13 12:44:17,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-13 12:44:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:44:17,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:17,040 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:17,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:44:17,040 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:17,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -533878894, now seen corresponding path program 1 times [2024-11-13 12:44:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:17,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139693099] [2024-11-13 12:44:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:17,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139693099] [2024-11-13 12:44:17,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139693099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:17,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:17,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358036194] [2024-11-13 12:44:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:17,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:17,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:17,135 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:17,173 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-11-13 12:44:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 12:44:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:17,177 INFO L225 Difference]: With dead ends: 68 [2024-11-13 12:44:17,177 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 12:44:17,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:17,178 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:17,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 12:44:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-11-13 12:44:17,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-11-13 12:44:17,192 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 9 [2024-11-13 12:44:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:17,195 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-11-13 12:44:17,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-11-13 12:44:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:44:17,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:17,196 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:17,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:44:17,196 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:17,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -476620592, now seen corresponding path program 1 times [2024-11-13 12:44:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:17,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051871209] [2024-11-13 12:44:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:17,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:17,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051871209] [2024-11-13 12:44:17,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051871209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:17,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:17,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:44:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549256333] [2024-11-13 12:44:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:17,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:17,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:17,270 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:17,364 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-11-13 12:44:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:17,368 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 12:44:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:17,369 INFO L225 Difference]: With dead ends: 60 [2024-11-13 12:44:17,369 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 12:44:17,369 INFO L431 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 [2024-11-13 12:44:17,370 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:17,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 12:44:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-13 12:44:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.6) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-11-13 12:44:17,383 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2024-11-13 12:44:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:17,383 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-11-13 12:44:17,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-11-13 12:44:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:44:17,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:17,384 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:17,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:44:17,384 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:17,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash -476620591, now seen corresponding path program 1 times [2024-11-13 12:44:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094719784] [2024-11-13 12:44:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:17,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094719784] [2024-11-13 12:44:17,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094719784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:17,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:17,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:44:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864945954] [2024-11-13 12:44:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:17,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:44:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:44:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:17,668 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:17,818 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-11-13 12:44:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:44:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 12:44:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:17,822 INFO L225 Difference]: With dead ends: 63 [2024-11-13 12:44:17,822 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 12:44:17,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:17,823 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 18 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:17,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 12:44:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-11-13 12:44:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-11-13 12:44:17,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 9 [2024-11-13 12:44:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:17,837 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-11-13 12:44:17,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-11-13 12:44:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:17,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:17,838 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:17,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 12:44:17,838 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:17,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash 629621784, now seen corresponding path program 1 times [2024-11-13 12:44:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400120904] [2024-11-13 12:44:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400120904] [2024-11-13 12:44:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400120904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:18,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:18,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140363406] [2024-11-13 12:44:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:18,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:18,054 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:18,145 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-13 12:44:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:18,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 12:44:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:18,150 INFO L225 Difference]: With dead ends: 73 [2024-11-13 12:44:18,150 INFO L226 Difference]: Without dead ends: 73 [2024-11-13 12:44:18,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:18,151 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:18,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 118 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-13 12:44:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-11-13 12:44:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.543859649122807) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-11-13 12:44:18,167 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 10 [2024-11-13 12:44:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:18,167 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-11-13 12:44:18,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-11-13 12:44:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:18,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:18,168 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:18,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 12:44:18,168 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:18,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -179724842, now seen corresponding path program 1 times [2024-11-13 12:44:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:18,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682453834] [2024-11-13 12:44:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:18,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682453834] [2024-11-13 12:44:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682453834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:18,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729394068] [2024-11-13 12:44:18,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:18,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:18,471 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:18,564 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2024-11-13 12:44:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 12:44:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:18,566 INFO L225 Difference]: With dead ends: 85 [2024-11-13 12:44:18,566 INFO L226 Difference]: Without dead ends: 85 [2024-11-13 12:44:18,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:18,567 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:18,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-13 12:44:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2024-11-13 12:44:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.543859649122807) internal successors, (88), 71 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-11-13 12:44:18,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 10 [2024-11-13 12:44:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:18,583 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-11-13 12:44:18,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-11-13 12:44:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:44:18,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:18,585 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:18,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 12:44:18,585 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:18,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash -178096715, now seen corresponding path program 1 times [2024-11-13 12:44:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711125045] [2024-11-13 12:44:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:18,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711125045] [2024-11-13 12:44:18,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711125045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733915387] [2024-11-13 12:44:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:18,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:18,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:18,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:44:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:19,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 12:44:19,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 12:44:19,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-13 12:44:19,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 12:44:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:19,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 12:44:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733915387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:19,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-13 12:44:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453185846] [2024-11-13 12:44:19,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:19,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:44:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:44:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:44:19,798 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,150 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-11-13 12:44:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:44:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 12:44:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,152 INFO L225 Difference]: With dead ends: 75 [2024-11-13 12:44:20,152 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 12:44:20,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:20,153 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 26 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 212 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 12:44:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2024-11-13 12:44:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 68 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-11-13 12:44:20,162 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 10 [2024-11-13 12:44:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,163 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-11-13 12:44:20,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-11-13 12:44:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 12:44:20,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,163 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:44:20,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:20,364 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:20,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1956561185, now seen corresponding path program 1 times [2024-11-13 12:44:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840065596] [2024-11-13 12:44:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840065596] [2024-11-13 12:44:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840065596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796282277] [2024-11-13 12:44:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,592 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,625 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2024-11-13 12:44:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:20,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 12:44:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,627 INFO L225 Difference]: With dead ends: 75 [2024-11-13 12:44:20,627 INFO L226 Difference]: Without dead ends: 75 [2024-11-13 12:44:20,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:20,628 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-13 12:44:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2024-11-13 12:44:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.5) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2024-11-13 12:44:20,637 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 11 [2024-11-13 12:44:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,640 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2024-11-13 12:44:20,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,641 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2024-11-13 12:44:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 12:44:20,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,641 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 12:44:20,642 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:20,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1529059485, now seen corresponding path program 1 times [2024-11-13 12:44:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846036134] [2024-11-13 12:44:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:20,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:20,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846036134] [2024-11-13 12:44:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846036134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:20,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:20,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:44:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434577060] [2024-11-13 12:44:20,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:20,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:44:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:44:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:20,900 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:20,984 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2024-11-13 12:44:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:44:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 12:44:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:20,986 INFO L225 Difference]: With dead ends: 82 [2024-11-13 12:44:20,986 INFO L226 Difference]: Without dead ends: 82 [2024-11-13 12:44:20,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:20,986 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:20,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 101 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-13 12:44:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2024-11-13 12:44:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.5) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2024-11-13 12:44:20,996 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 11 [2024-11-13 12:44:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:20,996 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2024-11-13 12:44:20,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2024-11-13 12:44:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-13 12:44:20,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:20,997 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:20,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 12:44:20,997 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:20,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:20,997 INFO L85 PathProgramCache]: Analyzing trace with hash 157837087, now seen corresponding path program 1 times [2024-11-13 12:44:20,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:20,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181040942] [2024-11-13 12:44:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:20,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:21,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181040942] [2024-11-13 12:44:21,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181040942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092289124] [2024-11-13 12:44:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:21,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:21,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:44:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:21,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:44:21,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:21,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-13 12:44:21,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 12:44:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:21,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092289124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:21,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:21,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-13 12:44:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550623739] [2024-11-13 12:44:21,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:21,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:44:21,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:44:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:44:21,972 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:22,350 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2024-11-13 12:44:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:44:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-13 12:44:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:22,351 INFO L225 Difference]: With dead ends: 77 [2024-11-13 12:44:22,352 INFO L226 Difference]: Without dead ends: 77 [2024-11-13 12:44:22,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:22,353 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:22,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 236 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-13 12:44:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2024-11-13 12:44:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-13 12:44:22,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 12 [2024-11-13 12:44:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:22,363 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-13 12:44:22,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-13 12:44:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 12:44:22,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:22,364 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:22,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:22,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:22,566 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:22,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:22,566 INFO L85 PathProgramCache]: Analyzing trace with hash 940376674, now seen corresponding path program 1 times [2024-11-13 12:44:22,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688751114] [2024-11-13 12:44:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:22,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:22,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688751114] [2024-11-13 12:44:22,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688751114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:22,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:22,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:22,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750672122] [2024-11-13 12:44:22,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:22,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:22,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:22,692 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:22,771 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-13 12:44:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 12:44:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:22,773 INFO L225 Difference]: With dead ends: 70 [2024-11-13 12:44:22,773 INFO L226 Difference]: Without dead ends: 70 [2024-11-13 12:44:22,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:22,775 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:22,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 60 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-13 12:44:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-13 12:44:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-13 12:44:22,780 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 13 [2024-11-13 12:44:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:22,781 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-13 12:44:22,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-13 12:44:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 12:44:22,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:22,782 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:22,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 12:44:22,782 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:22,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash 940376675, now seen corresponding path program 1 times [2024-11-13 12:44:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:22,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067350040] [2024-11-13 12:44:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:22,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:22,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067350040] [2024-11-13 12:44:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067350040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:22,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:22,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:44:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325656165] [2024-11-13 12:44:22,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:22,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:44:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:44:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:22,929 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:23,065 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2024-11-13 12:44:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:44:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 12:44:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:23,067 INFO L225 Difference]: With dead ends: 93 [2024-11-13 12:44:23,067 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 12:44:23,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:23,068 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:23,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 126 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 12:44:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2024-11-13 12:44:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-13 12:44:23,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 13 [2024-11-13 12:44:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:23,072 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-13 12:44:23,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-13 12:44:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 12:44:23,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:23,073 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:23,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 12:44:23,073 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:23,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:23,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1396287028, now seen corresponding path program 1 times [2024-11-13 12:44:23,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:23,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103154236] [2024-11-13 12:44:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:23,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:23,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103154236] [2024-11-13 12:44:23,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103154236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:23,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:23,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:44:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410543063] [2024-11-13 12:44:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:23,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:44:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:44:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:23,453 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:23,540 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-11-13 12:44:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:44:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-13 12:44:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:23,541 INFO L225 Difference]: With dead ends: 70 [2024-11-13 12:44:23,542 INFO L226 Difference]: Without dead ends: 70 [2024-11-13 12:44:23,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:23,543 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:23,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-13 12:44:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2024-11-13 12:44:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-13 12:44:23,547 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2024-11-13 12:44:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:23,547 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-13 12:44:23,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-13 12:44:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 12:44:23,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:23,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:23,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 12:44:23,549 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:23,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1357532011, now seen corresponding path program 1 times [2024-11-13 12:44:23,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:23,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259454719] [2024-11-13 12:44:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259454719] [2024-11-13 12:44:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259454719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:23,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:23,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:44:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876627993] [2024-11-13 12:44:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:23,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:44:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:44:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:23,857 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:24,060 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-13 12:44:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:44:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-13 12:44:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:24,063 INFO L225 Difference]: With dead ends: 56 [2024-11-13 12:44:24,063 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 12:44:24,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:24,064 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:24,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 12:44:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-13 12:44:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-13 12:44:24,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2024-11-13 12:44:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:24,077 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-13 12:44:24,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-13 12:44:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:44:24,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:24,078 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:24,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 12:44:24,079 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:24,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1758852678, now seen corresponding path program 1 times [2024-11-13 12:44:24,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:24,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648439877] [2024-11-13 12:44:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:24,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:24,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648439877] [2024-11-13 12:44:24,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648439877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:24,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582590350] [2024-11-13 12:44:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:24,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:24,205 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:24,281 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-13 12:44:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:24,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:44:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:24,282 INFO L225 Difference]: With dead ends: 49 [2024-11-13 12:44:24,282 INFO L226 Difference]: Without dead ends: 49 [2024-11-13 12:44:24,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:24,283 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:24,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:24,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-13 12:44:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-13 12:44:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.380952380952381) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-13 12:44:24,285 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 15 [2024-11-13 12:44:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:24,286 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-13 12:44:24,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-13 12:44:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:44:24,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:24,286 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:24,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 12:44:24,287 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:24,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1758852679, now seen corresponding path program 1 times [2024-11-13 12:44:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900252081] [2024-11-13 12:44:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:24,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900252081] [2024-11-13 12:44:24,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900252081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:24,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:24,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:44:24,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911903612] [2024-11-13 12:44:24,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:24,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:44:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:44:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:24,533 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:24,721 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2024-11-13 12:44:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:44:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:44:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:24,722 INFO L225 Difference]: With dead ends: 64 [2024-11-13 12:44:24,722 INFO L226 Difference]: Without dead ends: 64 [2024-11-13 12:44:24,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:44:24,723 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:24,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 114 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-13 12:44:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-11-13 12:44:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.4) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-11-13 12:44:24,726 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 15 [2024-11-13 12:44:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:24,727 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-11-13 12:44:24,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-11-13 12:44:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 12:44:24,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:24,727 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:24,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 12:44:24,728 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:24,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1959713587, now seen corresponding path program 1 times [2024-11-13 12:44:24,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:24,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82641641] [2024-11-13 12:44:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:24,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82641641] [2024-11-13 12:44:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82641641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439724326] [2024-11-13 12:44:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:24,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:44:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:44:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:24,905 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:24,945 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2024-11-13 12:44:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:44:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-13 12:44:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:24,946 INFO L225 Difference]: With dead ends: 56 [2024-11-13 12:44:24,946 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 12:44:24,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:44:24,947 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:24,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 12:44:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-13 12:44:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2024-11-13 12:44:24,950 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 17 [2024-11-13 12:44:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:24,950 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2024-11-13 12:44:24,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2024-11-13 12:44:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 12:44:24,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:24,952 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:24,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-13 12:44:24,952 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:24,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2066133762, now seen corresponding path program 1 times [2024-11-13 12:44:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227752271] [2024-11-13 12:44:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:24,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:24,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227752271] [2024-11-13 12:44:24,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227752271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:24,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:24,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:44:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438164209] [2024-11-13 12:44:24,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:25,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:44:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:44:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:25,001 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:25,012 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2024-11-13 12:44:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:44:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-13 12:44:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:25,013 INFO L225 Difference]: With dead ends: 55 [2024-11-13 12:44:25,013 INFO L226 Difference]: Without dead ends: 55 [2024-11-13 12:44:25,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:44:25,014 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:25,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-13 12:44:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-13 12:44:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-11-13 12:44:25,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 19 [2024-11-13 12:44:25,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:25,022 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-11-13 12:44:25,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-11-13 12:44:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 12:44:25,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:25,023 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:25,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 12:44:25,023 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:25,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2066142836, now seen corresponding path program 1 times [2024-11-13 12:44:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:25,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580366349] [2024-11-13 12:44:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:25,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:25,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580366349] [2024-11-13 12:44:25,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580366349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:25,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:25,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:44:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876047850] [2024-11-13 12:44:25,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:25,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:44:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:44:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:44:25,131 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:25,201 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-11-13 12:44:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:44:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-13 12:44:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:25,203 INFO L225 Difference]: With dead ends: 54 [2024-11-13 12:44:25,203 INFO L226 Difference]: Without dead ends: 54 [2024-11-13 12:44:25,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:25,204 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:25,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 59 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-13 12:44:25,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-13 12:44:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-13 12:44:25,208 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 19 [2024-11-13 12:44:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:25,208 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-13 12:44:25,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-13 12:44:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 12:44:25,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:25,209 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:25,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 12:44:25,210 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:25,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2066142835, now seen corresponding path program 1 times [2024-11-13 12:44:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:25,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150437767] [2024-11-13 12:44:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:25,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:25,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:25,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150437767] [2024-11-13 12:44:25,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150437767] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:25,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:25,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:44:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322630104] [2024-11-13 12:44:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:25,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:44:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:44:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:25,406 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:25,576 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2024-11-13 12:44:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:44:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-13 12:44:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:25,577 INFO L225 Difference]: With dead ends: 91 [2024-11-13 12:44:25,577 INFO L226 Difference]: Without dead ends: 91 [2024-11-13 12:44:25,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:44:25,579 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:25,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 100 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-13 12:44:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2024-11-13 12:44:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-11-13 12:44:25,582 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 19 [2024-11-13 12:44:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:25,582 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-11-13 12:44:25,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-11-13 12:44:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 12:44:25,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:25,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:25,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 12:44:25,583 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:25,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1279688818, now seen corresponding path program 1 times [2024-11-13 12:44:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473045161] [2024-11-13 12:44:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:25,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473045161] [2024-11-13 12:44:25,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473045161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:25,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:25,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:44:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113775908] [2024-11-13 12:44:25,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:25,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:44:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:44:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:25,669 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:25,717 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-13 12:44:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:44:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-13 12:44:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:25,718 INFO L225 Difference]: With dead ends: 63 [2024-11-13 12:44:25,718 INFO L226 Difference]: Without dead ends: 60 [2024-11-13 12:44:25,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:44:25,719 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:25,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:44:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-13 12:44:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-13 12:44:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-13 12:44:25,722 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 21 [2024-11-13 12:44:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:25,723 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-13 12:44:25,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-13 12:44:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 12:44:25,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:25,725 INFO L215 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] [2024-11-13 12:44:25,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 12:44:25,725 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:25,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1284856428, now seen corresponding path program 1 times [2024-11-13 12:44:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188608315] [2024-11-13 12:44:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:25,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:26,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188608315] [2024-11-13 12:44:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188608315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:26,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:26,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 12:44:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251289066] [2024-11-13 12:44:26,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:26,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:44:26,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:44:26,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:44:26,116 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:26,407 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-11-13 12:44:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:44:26,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-13 12:44:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:26,408 INFO L225 Difference]: With dead ends: 81 [2024-11-13 12:44:26,408 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 12:44:26,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-11-13 12:44:26,409 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:26,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 197 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 12:44:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-11-13 12:44:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2024-11-13 12:44:26,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 22 [2024-11-13 12:44:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:26,414 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2024-11-13 12:44:26,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2024-11-13 12:44:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-13 12:44:26,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:26,415 INFO L215 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] [2024-11-13 12:44:26,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-13 12:44:26,415 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:26,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2102504878, now seen corresponding path program 1 times [2024-11-13 12:44:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:26,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084369550] [2024-11-13 12:44:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:26,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084369550] [2024-11-13 12:44:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084369550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:26,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:26,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-13 12:44:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876356682] [2024-11-13 12:44:26,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:26,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:44:26,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:44:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:44:26,851 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:27,175 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2024-11-13 12:44:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:44:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-13 12:44:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:27,176 INFO L225 Difference]: With dead ends: 106 [2024-11-13 12:44:27,176 INFO L226 Difference]: Without dead ends: 106 [2024-11-13 12:44:27,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:27,179 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:27,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 189 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-13 12:44:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2024-11-13 12:44:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.236842105263158) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2024-11-13 12:44:27,185 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 22 [2024-11-13 12:44:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:27,186 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2024-11-13 12:44:27,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2024-11-13 12:44:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 12:44:27,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:27,186 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:27,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 12:44:27,186 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:27,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:27,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2091447644, now seen corresponding path program 1 times [2024-11-13 12:44:27,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:27,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635435856] [2024-11-13 12:44:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:27,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:27,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:27,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635435856] [2024-11-13 12:44:27,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635435856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:27,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:27,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:44:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517342628] [2024-11-13 12:44:27,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:27,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:44:27,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:27,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:44:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:44:27,410 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:27,475 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2024-11-13 12:44:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:44:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-13 12:44:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:27,476 INFO L225 Difference]: With dead ends: 93 [2024-11-13 12:44:27,477 INFO L226 Difference]: Without dead ends: 76 [2024-11-13 12:44:27,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:44:27,477 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:27,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 180 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-13 12:44:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-13 12:44:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-13 12:44:27,481 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 24 [2024-11-13 12:44:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:27,481 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-13 12:44:27,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-13 12:44:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 12:44:27,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:27,481 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:27,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 12:44:27,482 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:27,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1872592926, now seen corresponding path program 1 times [2024-11-13 12:44:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852312699] [2024-11-13 12:44:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:27,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:27,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:27,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852312699] [2024-11-13 12:44:27,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852312699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:27,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:27,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:44:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103201460] [2024-11-13 12:44:27,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:27,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:44:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:44:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:44:27,729 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:27,805 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-11-13 12:44:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:44:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-13 12:44:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:27,806 INFO L225 Difference]: With dead ends: 73 [2024-11-13 12:44:27,806 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 12:44:27,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:44:27,807 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:27,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 12:44:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-11-13 12:44:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2024-11-13 12:44:27,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 24 [2024-11-13 12:44:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:27,812 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2024-11-13 12:44:27,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2024-11-13 12:44:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 12:44:27,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:27,813 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:27,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-13 12:44:27,813 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:27,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash -942486200, now seen corresponding path program 1 times [2024-11-13 12:44:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900052303] [2024-11-13 12:44:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:28,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900052303] [2024-11-13 12:44:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900052303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 12:44:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214861077] [2024-11-13 12:44:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:28,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 12:44:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 12:44:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:44:28,094 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:28,226 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-11-13 12:44:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:44:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 12:44:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:28,228 INFO L225 Difference]: With dead ends: 66 [2024-11-13 12:44:28,228 INFO L226 Difference]: Without dead ends: 50 [2024-11-13 12:44:28,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:44:28,228 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:28,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 211 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-13 12:44:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-13 12:44:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-13 12:44:28,235 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 25 [2024-11-13 12:44:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:28,235 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-13 12:44:28,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-13 12:44:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 12:44:28,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:28,235 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:28,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-13 12:44:28,236 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:28,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -723631482, now seen corresponding path program 1 times [2024-11-13 12:44:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:28,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449379588] [2024-11-13 12:44:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:28,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449379588] [2024-11-13 12:44:28,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449379588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:44:28,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:44:28,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:44:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699811147] [2024-11-13 12:44:28,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:44:28,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:44:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:44:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:44:28,565 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:28,702 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2024-11-13 12:44:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:44:28,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-13 12:44:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:28,703 INFO L225 Difference]: With dead ends: 62 [2024-11-13 12:44:28,704 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 12:44:28,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:44:28,705 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:28,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 168 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:44:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 12:44:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-13 12:44:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-13 12:44:28,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2024-11-13 12:44:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:28,708 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-13 12:44:28,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-13 12:44:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 12:44:28,708 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:28,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:28,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 12:44:28,709 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:28,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:28,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1759380968, now seen corresponding path program 1 times [2024-11-13 12:44:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:28,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756890634] [2024-11-13 12:44:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:28,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:29,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:29,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756890634] [2024-11-13 12:44:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756890634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572112422] [2024-11-13 12:44:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:29,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:29,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:29,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:44:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:29,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 12:44:29,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:29,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:29,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:44:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572112422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:29,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-13 12:44:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755508380] [2024-11-13 12:44:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:29,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 12:44:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 12:44:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:29,664 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:29,986 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-11-13 12:44:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:44:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-13 12:44:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:29,987 INFO L225 Difference]: With dead ends: 63 [2024-11-13 12:44:29,987 INFO L226 Difference]: Without dead ends: 59 [2024-11-13 12:44:29,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-13 12:44:29,988 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:29,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 198 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-13 12:44:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2024-11-13 12:44:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-13 12:44:29,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 28 [2024-11-13 12:44:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:29,991 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-13 12:44:29,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-13 12:44:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 12:44:29,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:29,991 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:30,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:44:30,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:30,192 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:30,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1451970088, now seen corresponding path program 1 times [2024-11-13 12:44:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067666918] [2024-11-13 12:44:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:30,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:30,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:30,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067666918] [2024-11-13 12:44:30,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067666918] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:30,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782470899] [2024-11-13 12:44:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:30,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:30,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:30,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:44:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:30,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 12:44:30,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:30,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:30,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:44:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782470899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:30,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-13 12:44:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819021897] [2024-11-13 12:44:30,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:30,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:44:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:44:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:44:30,931 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 17 states, 16 states have (on average 4.375) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:31,152 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2024-11-13 12:44:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:44:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.375) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 12:44:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:31,154 INFO L225 Difference]: With dead ends: 84 [2024-11-13 12:44:31,154 INFO L226 Difference]: Without dead ends: 84 [2024-11-13 12:44:31,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:44:31,155 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:31,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-13 12:44:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2024-11-13 12:44:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-11-13 12:44:31,158 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 30 [2024-11-13 12:44:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:31,158 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-11-13 12:44:31,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.375) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-11-13 12:44:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 12:44:31,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:31,159 INFO L215 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] [2024-11-13 12:44:31,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:31,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 12:44:31,360 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:31,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash -487793442, now seen corresponding path program 1 times [2024-11-13 12:44:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:31,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328042985] [2024-11-13 12:44:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:31,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:31,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328042985] [2024-11-13 12:44:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328042985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:31,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846380587] [2024-11-13 12:44:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:31,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:31,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:31,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:31,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:44:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:31,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 12:44:31,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:31,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:32,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:32,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:44:32,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:44:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846380587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:32,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:32,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2024-11-13 12:44:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100770815] [2024-11-13 12:44:32,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:32,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 12:44:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 12:44:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:32,142 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:33,097 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2024-11-13 12:44:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 12:44:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-13 12:44:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:33,099 INFO L225 Difference]: With dead ends: 114 [2024-11-13 12:44:33,099 INFO L226 Difference]: Without dead ends: 108 [2024-11-13 12:44:33,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 12:44:33,100 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:33,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 230 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:44:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-13 12:44:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-11-13 12:44:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.164835164835165) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2024-11-13 12:44:33,107 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 32 [2024-11-13 12:44:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:33,107 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2024-11-13 12:44:33,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2024-11-13 12:44:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 12:44:33,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:33,108 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 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] [2024-11-13 12:44:33,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:44:33,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 12:44:33,313 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:33,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1969147282, now seen corresponding path program 1 times [2024-11-13 12:44:33,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:33,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507398177] [2024-11-13 12:44:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:33,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:44:33,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507398177] [2024-11-13 12:44:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507398177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887409514] [2024-11-13 12:44:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:33,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:33,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:33,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:33,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:44:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:33,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 12:44:33,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:33,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:33,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:33,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:44:33,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:44:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887409514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:33,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:33,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 17 [2024-11-13 12:44:33,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472789489] [2024-11-13 12:44:33,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:33,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:44:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:44:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:44:33,904 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:34,287 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2024-11-13 12:44:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:44:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-13 12:44:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:34,288 INFO L225 Difference]: With dead ends: 159 [2024-11-13 12:44:34,288 INFO L226 Difference]: Without dead ends: 138 [2024-11-13 12:44:34,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:44:34,289 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:34,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 303 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:44:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-13 12:44:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2024-11-13 12:44:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 129 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-11-13 12:44:34,294 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 36 [2024-11-13 12:44:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:34,294 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-11-13 12:44:34,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-11-13 12:44:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 12:44:34,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:34,295 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:34,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:44:34,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-13 12:44:34,499 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:34,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash -88879691, now seen corresponding path program 2 times [2024-11-13 12:44:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:34,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504440308] [2024-11-13 12:44:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:34,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504440308] [2024-11-13 12:44:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504440308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500308823] [2024-11-13 12:44:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:44:34,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:34,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:34,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:44:35,058 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:44:35,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:35,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:44:35,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:35,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:35,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:44:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:35,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500308823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:35,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-13 12:44:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036167911] [2024-11-13 12:44:35,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:35,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:44:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:44:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:44:35,707 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:36,241 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2024-11-13 12:44:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:44:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 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 38 [2024-11-13 12:44:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:36,244 INFO L225 Difference]: With dead ends: 170 [2024-11-13 12:44:36,245 INFO L226 Difference]: Without dead ends: 170 [2024-11-13 12:44:36,246 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2024-11-13 12:44:36,246 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 113 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:36,247 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 262 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:44:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-13 12:44:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2024-11-13 12:44:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 142 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2024-11-13 12:44:36,257 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 38 [2024-11-13 12:44:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:36,257 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2024-11-13 12:44:36,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.769230769230769) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2024-11-13 12:44:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 12:44:36,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:36,258 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:36,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:44:36,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:36,459 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:36,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1140745733, now seen corresponding path program 2 times [2024-11-13 12:44:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:36,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454377561] [2024-11-13 12:44:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:37,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454377561] [2024-11-13 12:44:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454377561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515972036] [2024-11-13 12:44:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:44:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:37,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:44:38,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:44:38,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:38,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 12:44:38,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:38,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:38,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:38,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:44:38,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:44:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515972036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:38,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:38,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 33 [2024-11-13 12:44:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101224073] [2024-11-13 12:44:38,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:38,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 12:44:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 12:44:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 12:44:38,933 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:40,626 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2024-11-13 12:44:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:44:40,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-13 12:44:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:40,628 INFO L225 Difference]: With dead ends: 227 [2024-11-13 12:44:40,628 INFO L226 Difference]: Without dead ends: 198 [2024-11-13 12:44:40,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 12:44:40,630 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:40,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 403 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:44:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-13 12:44:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2024-11-13 12:44:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 187 states have (on average 1.1336898395721926) internal successors, (212), 189 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 212 transitions. [2024-11-13 12:44:40,643 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 212 transitions. Word has length 42 [2024-11-13 12:44:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:40,643 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 212 transitions. [2024-11-13 12:44:40,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 212 transitions. [2024-11-13 12:44:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:44:40,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:40,644 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:40,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-13 12:44:40,845 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:40,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash -840662067, now seen corresponding path program 2 times [2024-11-13 12:44:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:40,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369188081] [2024-11-13 12:44:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:40,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369188081] [2024-11-13 12:44:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369188081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606365541] [2024-11-13 12:44:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:44:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:41,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:41,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:44:41,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:44:41,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:41,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:44:41,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:41,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:41,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:44:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:41,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606365541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:41,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-13 12:44:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670777457] [2024-11-13 12:44:41,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:41,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 12:44:41,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 12:44:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:44:41,923 INFO L87 Difference]: Start difference. First operand 190 states and 212 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:42,239 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2024-11-13 12:44:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:44:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 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 44 [2024-11-13 12:44:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:42,241 INFO L225 Difference]: With dead ends: 303 [2024-11-13 12:44:42,241 INFO L226 Difference]: Without dead ends: 303 [2024-11-13 12:44:42,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:44:42,242 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:42,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 280 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:44:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2024-11-13 12:44:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2024-11-13 12:44:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 244 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2024-11-13 12:44:42,251 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 44 [2024-11-13 12:44:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:42,251 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2024-11-13 12:44:42,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2024-11-13 12:44:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:44:42,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:42,252 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:42,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:44:42,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-13 12:44:42,453 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:42,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:42,453 INFO L85 PathProgramCache]: Analyzing trace with hash -873088855, now seen corresponding path program 3 times [2024-11-13 12:44:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:42,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044097592] [2024-11-13 12:44:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:44:43,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044097592] [2024-11-13 12:44:43,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044097592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:43,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782551940] [2024-11-13 12:44:43,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:44:43,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:43,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:43,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:44:43,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:44:43,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:43,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 12:44:43,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:43,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:43,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:44:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:44:43,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:43,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:44:43,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:44:43,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:44:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:44:43,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782551940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:43,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:43,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2024-11-13 12:44:43,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931705205] [2024-11-13 12:44:43,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:43,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 12:44:43,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 12:44:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-11-13 12:44:43,848 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:44,399 INFO L93 Difference]: Finished difference Result 239 states and 266 transitions. [2024-11-13 12:44:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:44:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 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 45 [2024-11-13 12:44:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:44,400 INFO L225 Difference]: With dead ends: 239 [2024-11-13 12:44:44,400 INFO L226 Difference]: Without dead ends: 208 [2024-11-13 12:44:44,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 12:44:44,402 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:44,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 466 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:44:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-13 12:44:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2024-11-13 12:44:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 205 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2024-11-13 12:44:44,410 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 45 [2024-11-13 12:44:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:44,410 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2024-11-13 12:44:44,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2024-11-13 12:44:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:44:44,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:44,411 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:44,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:44:44,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 12:44:44,616 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:44,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash 207512503, now seen corresponding path program 4 times [2024-11-13 12:44:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80293855] [2024-11-13 12:44:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:44:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:44,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80293855] [2024-11-13 12:44:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80293855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:44,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807405277] [2024-11-13 12:44:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:44:44,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:44,944 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:44:45,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:44:45,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:45,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 12:44:45,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:45,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:44:46,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:44:46,403 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-13 12:44:46,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2024-11-13 12:44:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 12:44:46,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:47,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:44:47,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 12:44:47,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:44:47,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2024-11-13 12:44:47,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:44:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 12:44:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807405277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:47,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 35 [2024-11-13 12:44:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271457580] [2024-11-13 12:44:47,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:47,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 12:44:47,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 12:44:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 12:44:47,845 INFO L87 Difference]: Start difference. First operand 206 states and 232 transitions. Second operand has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:49,704 INFO L93 Difference]: Finished difference Result 222 states and 247 transitions. [2024-11-13 12:44:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 12:44:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 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 48 [2024-11-13 12:44:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:49,706 INFO L225 Difference]: With dead ends: 222 [2024-11-13 12:44:49,706 INFO L226 Difference]: Without dead ends: 222 [2024-11-13 12:44:49,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 12:44:49,707 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:49,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 359 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 12:44:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-13 12:44:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 210. [2024-11-13 12:44:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 209 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 236 transitions. [2024-11-13 12:44:49,717 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 236 transitions. Word has length 48 [2024-11-13 12:44:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:49,717 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 236 transitions. [2024-11-13 12:44:49,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.8) internal successors, (98), 36 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 236 transitions. [2024-11-13 12:44:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:44:49,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:49,720 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:49,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:44:49,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 12:44:49,924 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:49,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1861719161, now seen corresponding path program 1 times [2024-11-13 12:44:49,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:49,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413479577] [2024-11-13 12:44:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:49,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413479577] [2024-11-13 12:44:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413479577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857006005] [2024-11-13 12:44:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:50,263 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:50,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:44:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:50,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:44:50,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:50,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:50,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:44:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857006005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:51,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:51,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-13 12:44:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122603793] [2024-11-13 12:44:51,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:51,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:44:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:44:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:44:51,040 INFO L87 Difference]: Start difference. First operand 210 states and 236 transitions. Second operand has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:51,475 INFO L93 Difference]: Finished difference Result 224 states and 244 transitions. [2024-11-13 12:44:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:44:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-13 12:44:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:51,476 INFO L225 Difference]: With dead ends: 224 [2024-11-13 12:44:51,476 INFO L226 Difference]: Without dead ends: 224 [2024-11-13 12:44:51,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:44:51,477 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:51,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 234 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:44:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-13 12:44:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2024-11-13 12:44:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 207 states have (on average 1.1304347826086956) internal successors, (234), 209 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 234 transitions. [2024-11-13 12:44:51,489 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 234 transitions. Word has length 49 [2024-11-13 12:44:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:51,493 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 234 transitions. [2024-11-13 12:44:51,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 234 transitions. [2024-11-13 12:44:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:44:51,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:51,494 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:51,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 12:44:51,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 12:44:51,695 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:51,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1547060010, now seen corresponding path program 3 times [2024-11-13 12:44:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455686684] [2024-11-13 12:44:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455686684] [2024-11-13 12:44:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455686684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058150961] [2024-11-13 12:44:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:44:52,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:52,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:52,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:44:52,336 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 12:44:52,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:52,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 12:44:52,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:52,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:52,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:44:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:44:53,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058150961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:53,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:53,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-11-13 12:44:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655183069] [2024-11-13 12:44:53,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:53,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 12:44:53,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:53,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 12:44:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:44:53,074 INFO L87 Difference]: Start difference. First operand 210 states and 234 transitions. Second operand has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:53,715 INFO L93 Difference]: Finished difference Result 264 states and 294 transitions. [2024-11-13 12:44:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:44:53,716 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 0 states have call successors, (0), 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 51 [2024-11-13 12:44:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:53,717 INFO L225 Difference]: With dead ends: 264 [2024-11-13 12:44:53,717 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 12:44:53,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=1570, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 12:44:53,718 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 160 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:53,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 401 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:44:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 12:44:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 227. [2024-11-13 12:44:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 224 states have (on average 1.1428571428571428) internal successors, (256), 226 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 256 transitions. [2024-11-13 12:44:53,726 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 256 transitions. Word has length 51 [2024-11-13 12:44:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:53,726 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 256 transitions. [2024-11-13 12:44:53,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 34 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 256 transitions. [2024-11-13 12:44:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:44:53,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:53,728 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:53,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:44:53,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 12:44:53,932 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:53,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1694720762, now seen corresponding path program 3 times [2024-11-13 12:44:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760539633] [2024-11-13 12:44:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760539633] [2024-11-13 12:44:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760539633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422211373] [2024-11-13 12:44:55,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:44:55,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:55,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:55,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:44:55,427 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 12:44:55,427 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:55,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 12:44:55,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:55,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 12:44:55,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 12:44:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:55,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:44:56,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:44:56,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:44:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:44:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422211373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:44:56,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:44:56,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 33 [2024-11-13 12:44:56,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385528083] [2024-11-13 12:44:56,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:44:56,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 12:44:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:44:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 12:44:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 12:44:56,273 INFO L87 Difference]: Start difference. First operand 227 states and 256 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:44:57,377 INFO L93 Difference]: Finished difference Result 389 states and 430 transitions. [2024-11-13 12:44:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 12:44:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 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 55 [2024-11-13 12:44:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:44:57,379 INFO L225 Difference]: With dead ends: 389 [2024-11-13 12:44:57,379 INFO L226 Difference]: Without dead ends: 315 [2024-11-13 12:44:57,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 12:44:57,381 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:44:57,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 462 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:44:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-13 12:44:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2024-11-13 12:44:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 308 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 349 transitions. [2024-11-13 12:44:57,389 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 349 transitions. Word has length 55 [2024-11-13 12:44:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:44:57,389 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 349 transitions. [2024-11-13 12:44:57,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:44:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 349 transitions. [2024-11-13 12:44:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:44:57,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:44:57,390 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:44:57,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 12:44:57,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-13 12:44:57,594 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:44:57,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:44:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash 62016752, now seen corresponding path program 5 times [2024-11-13 12:44:57,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:44:57,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764129056] [2024-11-13 12:44:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:44:57,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:44:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:44:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:58,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:44:58,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764129056] [2024-11-13 12:44:58,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764129056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:44:58,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349948796] [2024-11-13 12:44:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:44:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:44:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:44:58,392 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:44:58,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:44:58,574 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 12:44:58,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:44:58,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 12:44:58,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:44:58,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:44:59,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:44:59,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 12:44:59,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:44:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:44:59,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:00,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-11-13 12:45:00,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-13 12:45:00,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-13 12:45:00,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2024-11-13 12:45:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:45:00,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349948796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:00,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:00,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 20] total 55 [2024-11-13 12:45:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244606711] [2024-11-13 12:45:00,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:00,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 12:45:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 12:45:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2739, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 12:45:00,384 INFO L87 Difference]: Start difference. First operand 309 states and 349 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:01,740 INFO L93 Difference]: Finished difference Result 309 states and 345 transitions. [2024-11-13 12:45:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 12:45:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 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 55 [2024-11-13 12:45:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:01,741 INFO L225 Difference]: With dead ends: 309 [2024-11-13 12:45:01,741 INFO L226 Difference]: Without dead ends: 309 [2024-11-13 12:45:01,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=434, Invalid=4822, Unknown=0, NotChecked=0, Total=5256 [2024-11-13 12:45:01,743 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:01,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 586 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:45:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-13 12:45:01,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 301. [2024-11-13 12:45:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 298 states have (on average 1.1308724832214765) internal successors, (337), 300 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 337 transitions. [2024-11-13 12:45:01,759 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 337 transitions. Word has length 55 [2024-11-13 12:45:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:01,759 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 337 transitions. [2024-11-13 12:45:01,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 337 transitions. [2024-11-13 12:45:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 12:45:01,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:01,760 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:01,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:45:01,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:01,964 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:01,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 726930568, now seen corresponding path program 4 times [2024-11-13 12:45:01,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:01,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600792166] [2024-11-13 12:45:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:01,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:45:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600792166] [2024-11-13 12:45:02,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600792166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:02,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240677781] [2024-11-13 12:45:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:45:02,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:02,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:45:02,446 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:45:02,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:02,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 12:45:02,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:02,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:45:03,909 INFO L349 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2024-11-13 12:45:03,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 37 [2024-11-13 12:45:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:03,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:04,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-13 12:45:04,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-13 12:45:04,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:45:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:04,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240677781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:04,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:04,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 13] total 33 [2024-11-13 12:45:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011531064] [2024-11-13 12:45:04,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:04,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 12:45:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 12:45:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:45:04,657 INFO L87 Difference]: Start difference. First operand 301 states and 337 transitions. Second operand has 34 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:06,060 INFO L93 Difference]: Finished difference Result 379 states and 415 transitions. [2024-11-13 12:45:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 12:45:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 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 58 [2024-11-13 12:45:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:06,062 INFO L225 Difference]: With dead ends: 379 [2024-11-13 12:45:06,062 INFO L226 Difference]: Without dead ends: 331 [2024-11-13 12:45:06,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 12:45:06,063 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 106 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:06,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 419 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:45:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-13 12:45:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 237. [2024-11-13 12:45:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.123404255319149) internal successors, (264), 236 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 264 transitions. [2024-11-13 12:45:06,071 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 264 transitions. Word has length 58 [2024-11-13 12:45:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:06,071 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 264 transitions. [2024-11-13 12:45:06,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 264 transitions. [2024-11-13 12:45:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 12:45:06,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:06,072 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:06,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:45:06,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:06,276 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:06,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash -905773442, now seen corresponding path program 6 times [2024-11-13 12:45:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:06,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316514762] [2024-11-13 12:45:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:06,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:06,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316514762] [2024-11-13 12:45:06,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316514762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:06,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934116311] [2024-11-13 12:45:06,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:45:06,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:06,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:06,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:45:06,834 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 12:45:06,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:06,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 12:45:06,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:07,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:07,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:45:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:07,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934116311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:07,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:07,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2024-11-13 12:45:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420793931] [2024-11-13 12:45:07,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:07,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 12:45:07,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 12:45:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-13 12:45:07,539 INFO L87 Difference]: Start difference. First operand 237 states and 264 transitions. Second operand has 30 states, 29 states have (on average 4.517241379310345) internal successors, (131), 30 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:08,038 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2024-11-13 12:45:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:45:08,039 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.517241379310345) internal successors, (131), 30 states have internal predecessors, (131), 0 states have call successors, (0), 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 58 [2024-11-13 12:45:08,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:08,040 INFO L225 Difference]: With dead ends: 255 [2024-11-13 12:45:08,040 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 12:45:08,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 12:45:08,041 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 113 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:08,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 510 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 12:45:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 241. [2024-11-13 12:45:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 239 states have (on average 1.1213389121338913) internal successors, (268), 240 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 268 transitions. [2024-11-13 12:45:08,050 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 268 transitions. Word has length 58 [2024-11-13 12:45:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:08,050 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 268 transitions. [2024-11-13 12:45:08,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.517241379310345) internal successors, (131), 30 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 268 transitions. [2024-11-13 12:45:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 12:45:08,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:08,052 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:08,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:45:08,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:08,255 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:08,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash 959211940, now seen corresponding path program 2 times [2024-11-13 12:45:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983200096] [2024-11-13 12:45:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:09,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983200096] [2024-11-13 12:45:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983200096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746923197] [2024-11-13 12:45:09,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:45:09,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:09,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:09,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:09,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:45:09,205 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:45:09,206 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:09,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 12:45:09,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:09,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:45:09,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:45:09,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 12:45:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:09,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:09,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:45:09,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:45:09,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:45:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:09,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746923197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:09,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:09,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 35 [2024-11-13 12:45:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040511272] [2024-11-13 12:45:09,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:09,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 12:45:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 12:45:09,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 12:45:09,728 INFO L87 Difference]: Start difference. First operand 241 states and 268 transitions. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:10,392 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2024-11-13 12:45:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 12:45:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 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 59 [2024-11-13 12:45:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:10,393 INFO L225 Difference]: With dead ends: 230 [2024-11-13 12:45:10,393 INFO L226 Difference]: Without dead ends: 172 [2024-11-13 12:45:10,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 12:45:10,394 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:10,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 463 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-13 12:45:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-11-13 12:45:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.130952380952381) internal successors, (190), 169 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:10,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 190 transitions. [2024-11-13 12:45:10,400 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 190 transitions. Word has length 59 [2024-11-13 12:45:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:10,400 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 190 transitions. [2024-11-13 12:45:10,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 190 transitions. [2024-11-13 12:45:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 12:45:10,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:10,401 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:10,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 12:45:10,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 12:45:10,605 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:10,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1382932227, now seen corresponding path program 4 times [2024-11-13 12:45:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61052966] [2024-11-13 12:45:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:11,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:11,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61052966] [2024-11-13 12:45:11,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61052966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:11,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672315920] [2024-11-13 12:45:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:45:11,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:11,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:11,377 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:11,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 12:45:11,558 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:45:11,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:11,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 12:45:11,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:11,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:45:16,350 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-13 12:45:16,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2024-11-13 12:45:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 29 proven. 18 refuted. 11 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:16,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:17,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-13 12:45:17,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:45:17,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2024-11-13 12:45:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672315920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:17,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:17,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 61 [2024-11-13 12:45:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151894874] [2024-11-13 12:45:17,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:17,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 12:45:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 12:45:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3365, Unknown=8, NotChecked=0, Total=3660 [2024-11-13 12:45:17,621 INFO L87 Difference]: Start difference. First operand 170 states and 190 transitions. Second operand has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 61 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:23,262 INFO L93 Difference]: Finished difference Result 380 states and 416 transitions. [2024-11-13 12:45:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-13 12:45:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 61 states have internal predecessors, (143), 0 states have call successors, (0), 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 61 [2024-11-13 12:45:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:23,264 INFO L225 Difference]: With dead ends: 380 [2024-11-13 12:45:23,264 INFO L226 Difference]: Without dead ends: 371 [2024-11-13 12:45:23,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1102, Invalid=13410, Unknown=8, NotChecked=0, Total=14520 [2024-11-13 12:45:23,269 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:23,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 453 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2128 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 12:45:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-13 12:45:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 292. [2024-11-13 12:45:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 290 states have (on average 1.1275862068965516) internal successors, (327), 291 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 327 transitions. [2024-11-13 12:45:23,277 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 327 transitions. Word has length 61 [2024-11-13 12:45:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:23,278 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 327 transitions. [2024-11-13 12:45:23,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 61 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 327 transitions. [2024-11-13 12:45:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 12:45:23,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:23,280 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:23,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 12:45:23,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 12:45:23,484 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:23,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash 495821874, now seen corresponding path program 3 times [2024-11-13 12:45:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425846275] [2024-11-13 12:45:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425846275] [2024-11-13 12:45:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425846275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660609698] [2024-11-13 12:45:23,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:45:23,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:23,887 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:23,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 12:45:24,090 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:45:24,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:24,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-13 12:45:24,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:24,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-13 12:45:24,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 12:45:24,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:45:24,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:45:25,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:45:25,250 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2024-11-13 12:45:25,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2024-11-13 12:45:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:25,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:25,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:45:26,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-13 12:45:26,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-11-13 12:45:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660609698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:26,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 18] total 45 [2024-11-13 12:45:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057203485] [2024-11-13 12:45:26,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:26,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 12:45:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 12:45:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 12:45:26,680 INFO L87 Difference]: Start difference. First operand 292 states and 327 transitions. Second operand has 46 states, 45 states have (on average 3.466666666666667) internal successors, (156), 46 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:30,558 INFO L93 Difference]: Finished difference Result 440 states and 487 transitions. [2024-11-13 12:45:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-13 12:45:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.466666666666667) internal successors, (156), 46 states have internal predecessors, (156), 0 states have call successors, (0), 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 62 [2024-11-13 12:45:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:30,559 INFO L225 Difference]: With dead ends: 440 [2024-11-13 12:45:30,559 INFO L226 Difference]: Without dead ends: 440 [2024-11-13 12:45:30,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1053, Invalid=7319, Unknown=0, NotChecked=0, Total=8372 [2024-11-13 12:45:30,560 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 284 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:30,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 434 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 12:45:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2024-11-13 12:45:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 364. [2024-11-13 12:45:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.1353591160220995) internal successors, (411), 363 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2024-11-13 12:45:30,567 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 62 [2024-11-13 12:45:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:30,568 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2024-11-13 12:45:30,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.466666666666667) internal successors, (156), 46 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2024-11-13 12:45:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 12:45:30,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:30,569 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:30,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:30,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 12:45:30,773 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:30,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1794983788, now seen corresponding path program 4 times [2024-11-13 12:45:30,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:30,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388150212] [2024-11-13 12:45:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388150212] [2024-11-13 12:45:31,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388150212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59515018] [2024-11-13 12:45:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:45:31,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:31,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:31,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 12:45:31,304 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:45:31,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:31,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 12:45:31,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:31,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:45:33,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:45:33,366 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2024-11-13 12:45:33,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2024-11-13 12:45:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 12:45:33,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:33,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:45:34,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-13 12:45:34,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-11-13 12:45:34,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:45:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 12:45:34,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59515018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:34,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:34,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 18] total 44 [2024-11-13 12:45:34,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406602540] [2024-11-13 12:45:34,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:34,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 12:45:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:34,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 12:45:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1774, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 12:45:34,619 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand has 45 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 45 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:48,159 INFO L93 Difference]: Finished difference Result 404 states and 440 transitions. [2024-11-13 12:45:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-13 12:45:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 45 states have internal predecessors, (146), 0 states have call successors, (0), 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 63 [2024-11-13 12:45:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:48,160 INFO L225 Difference]: With dead ends: 404 [2024-11-13 12:45:48,160 INFO L226 Difference]: Without dead ends: 228 [2024-11-13 12:45:48,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1122, Invalid=6708, Unknown=2, NotChecked=0, Total=7832 [2024-11-13 12:45:48,161 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 376 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:48,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 394 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:45:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-13 12:45:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 147. [2024-11-13 12:45:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 145 states have (on average 1.110344827586207) internal successors, (161), 146 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2024-11-13 12:45:48,165 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 63 [2024-11-13 12:45:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:48,165 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2024-11-13 12:45:48,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 45 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2024-11-13 12:45:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 12:45:48,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:48,166 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:48,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:48,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:48,370 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:48,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2007553735, now seen corresponding path program 5 times [2024-11-13 12:45:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233163411] [2024-11-13 12:45:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 63 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233163411] [2024-11-13 12:45:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233163411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128724137] [2024-11-13 12:45:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:45:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:48,771 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:48,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 12:45:48,951 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 12:45:48,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:48,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 12:45:48,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:48,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 12:45:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:49,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128724137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:49,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-11-13 12:45:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649150217] [2024-11-13 12:45:49,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:49,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 12:45:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 12:45:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:45:49,816 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 37 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:50,437 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2024-11-13 12:45:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:45:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 37 states have internal predecessors, (139), 0 states have call successors, (0), 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 67 [2024-11-13 12:45:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:50,439 INFO L225 Difference]: With dead ends: 167 [2024-11-13 12:45:50,439 INFO L226 Difference]: Without dead ends: 167 [2024-11-13 12:45:50,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 12:45:50,439 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 209 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:50,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 488 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:45:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-13 12:45:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2024-11-13 12:45:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.118421052631579) internal successors, (170), 153 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2024-11-13 12:45:50,441 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 67 [2024-11-13 12:45:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:50,441 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2024-11-13 12:45:50,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 37 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2024-11-13 12:45:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-13 12:45:50,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:50,442 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:50,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 12:45:50,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:50,643 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:50,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 910674445, now seen corresponding path program 7 times [2024-11-13 12:45:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:50,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796581367] [2024-11-13 12:45:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 79 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:51,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796581367] [2024-11-13 12:45:51,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796581367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302110839] [2024-11-13 12:45:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:45:51,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:51,003 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:51,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 12:45:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 12:45:51,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:51,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:51,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:45:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:45:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302110839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:51,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:51,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2024-11-13 12:45:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443440069] [2024-11-13 12:45:51,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:51,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 12:45:51,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 12:45:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-11-13 12:45:51,921 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand has 31 states, 30 states have (on average 4.4) internal successors, (132), 31 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:52,497 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2024-11-13 12:45:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 12:45:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.4) internal successors, (132), 31 states have internal predecessors, (132), 0 states have call successors, (0), 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 71 [2024-11-13 12:45:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:52,498 INFO L225 Difference]: With dead ends: 184 [2024-11-13 12:45:52,498 INFO L226 Difference]: Without dead ends: 184 [2024-11-13 12:45:52,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:45:52,499 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:52,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 457 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-13 12:45:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2024-11-13 12:45:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2024-11-13 12:45:52,502 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 71 [2024-11-13 12:45:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:52,502 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2024-11-13 12:45:52,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.4) internal successors, (132), 31 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2024-11-13 12:45:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 12:45:52,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:52,503 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:52,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 12:45:52,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-13 12:45:52,703 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:45:52,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1865305177, now seen corresponding path program 5 times [2024-11-13 12:45:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:52,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697619899] [2024-11-13 12:45:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697619899] [2024-11-13 12:45:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697619899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:53,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359026483] [2024-11-13 12:45:53,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:45:53,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:53,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:53,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 12:45:53,671 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 12:45:53,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:53,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-13 12:45:53,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:54,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:45:54,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:45:54,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:45:54,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 12:45:55,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:45:55,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:45:55,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2024-11-13 12:45:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:55,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:56,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-11-13 12:45:56,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-13 12:45:56,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:46:14,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-13 12:46:14,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 854 treesize of output 822 [2024-11-13 12:46:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 5 proven. 86 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:46:14,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359026483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:14,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 23] total 70 [2024-11-13 12:46:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204024842] [2024-11-13 12:46:14,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:14,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-13 12:46:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-13 12:46:14,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4489, Unknown=2, NotChecked=0, Total=4830 [2024-11-13 12:46:14,558 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 70 states, 70 states have (on average 2.914285714285714) internal successors, (204), 70 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:28,479 INFO L93 Difference]: Finished difference Result 263 states and 288 transitions. [2024-11-13 12:46:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-13 12:46:28,479 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.914285714285714) internal successors, (204), 70 states have internal predecessors, (204), 0 states have call successors, (0), 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 72 [2024-11-13 12:46:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:28,480 INFO L225 Difference]: With dead ends: 263 [2024-11-13 12:46:28,481 INFO L226 Difference]: Without dead ends: 263 [2024-11-13 12:46:28,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5954 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=1838, Invalid=19916, Unknown=2, NotChecked=0, Total=21756 [2024-11-13 12:46:28,483 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 388 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 34 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:28,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 471 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2252 Invalid, 3 Unknown, 0 Unchecked, 5.0s Time] [2024-11-13 12:46:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-13 12:46:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 223. [2024-11-13 12:46:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 221 states have (on average 1.1221719457013575) internal successors, (248), 222 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 248 transitions. [2024-11-13 12:46:28,488 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 248 transitions. Word has length 72 [2024-11-13 12:46:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:28,488 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 248 transitions. [2024-11-13 12:46:28,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.914285714285714) internal successors, (204), 70 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 248 transitions. [2024-11-13 12:46:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 12:46:28,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:28,490 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:28,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 12:46:28,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:28,690 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:46:28,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1405995756, now seen corresponding path program 6 times [2024-11-13 12:46:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449406284] [2024-11-13 12:46:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 92 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:46:29,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:29,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449406284] [2024-11-13 12:46:29,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449406284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:29,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048210375] [2024-11-13 12:46:29,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:46:29,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:29,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:29,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 12:46:29,726 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-13 12:46:29,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:29,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 12:46:29,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:30,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:46:30,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:46:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 92 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:46:30,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:30,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:46:30,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:46:30,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:46:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 5 proven. 92 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:46:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048210375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:30,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:30,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2024-11-13 12:46:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405385715] [2024-11-13 12:46:30,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:30,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 12:46:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 12:46:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 12:46:30,626 INFO L87 Difference]: Start difference. First operand 223 states and 248 transitions. Second operand has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:31,747 INFO L93 Difference]: Finished difference Result 293 states and 324 transitions. [2024-11-13 12:46:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:46:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-13 12:46:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:31,749 INFO L225 Difference]: With dead ends: 293 [2024-11-13 12:46:31,749 INFO L226 Difference]: Without dead ends: 293 [2024-11-13 12:46:31,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 12:46:31,750 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 79 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:31,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 1053 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:46:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-13 12:46:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 281. [2024-11-13 12:46:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.118279569892473) internal successors, (312), 280 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 312 transitions. [2024-11-13 12:46:31,755 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 312 transitions. Word has length 74 [2024-11-13 12:46:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:31,756 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 312 transitions. [2024-11-13 12:46:31,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 312 transitions. [2024-11-13 12:46:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 12:46:31,757 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:31,757 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:31,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:31,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:31,958 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:46:31,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2065773370, now seen corresponding path program 7 times [2024-11-13 12:46:31,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:31,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491822290] [2024-11-13 12:46:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:46:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491822290] [2024-11-13 12:46:33,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491822290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:33,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516127910] [2024-11-13 12:46:33,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:46:33,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:33,030 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:33,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 12:46:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:33,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-13 12:46:33,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:33,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:46:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 76 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:46:33,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:33,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:46:33,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:46:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 76 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:46:33,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516127910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:33,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:33,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 36 [2024-11-13 12:46:33,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023584536] [2024-11-13 12:46:33,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:33,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 12:46:33,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:33,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 12:46:33,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 12:46:33,861 INFO L87 Difference]: Start difference. First operand 281 states and 312 transitions. Second operand has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:34,968 INFO L93 Difference]: Finished difference Result 506 states and 557 transitions. [2024-11-13 12:46:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 12:46:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-13 12:46:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:34,970 INFO L225 Difference]: With dead ends: 506 [2024-11-13 12:46:34,970 INFO L226 Difference]: Without dead ends: 497 [2024-11-13 12:46:34,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 12:46:34,971 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 74 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:34,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 540 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:46:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2024-11-13 12:46:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 424. [2024-11-13 12:46:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 422 states have (on average 1.1161137440758293) internal successors, (471), 423 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 471 transitions. [2024-11-13 12:46:34,978 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 471 transitions. Word has length 77 [2024-11-13 12:46:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:34,978 INFO L471 AbstractCegarLoop]: Abstraction has 424 states and 471 transitions. [2024-11-13 12:46:34,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.138888888888889) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 471 transitions. [2024-11-13 12:46:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-13 12:46:34,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:34,980 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:35,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:35,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-13 12:46:35,184 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:46:35,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash -29465256, now seen corresponding path program 8 times [2024-11-13 12:46:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:35,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605170260] [2024-11-13 12:46:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 12 proven. 98 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:46:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605170260] [2024-11-13 12:46:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605170260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4551504] [2024-11-13 12:46:35,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:46:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:35,624 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:35,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 12:46:35,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:46:35,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:35,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 12:46:35,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 88 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:46:36,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:36,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:46:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 88 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:46:36,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4551504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:36,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:36,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-13 12:46:36,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223408472] [2024-11-13 12:46:36,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:36,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 12:46:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 12:46:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 12:46:36,850 INFO L87 Difference]: Start difference. First operand 424 states and 471 transitions. Second operand has 42 states, 41 states have (on average 4.073170731707317) internal successors, (167), 42 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:37,601 INFO L93 Difference]: Finished difference Result 465 states and 515 transitions. [2024-11-13 12:46:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 12:46:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.073170731707317) internal successors, (167), 42 states have internal predecessors, (167), 0 states have call successors, (0), 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 80 [2024-11-13 12:46:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:37,602 INFO L225 Difference]: With dead ends: 465 [2024-11-13 12:46:37,602 INFO L226 Difference]: Without dead ends: 465 [2024-11-13 12:46:37,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=2124, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 12:46:37,603 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 182 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:37,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 553 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:46:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-13 12:46:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 434. [2024-11-13 12:46:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 1.1203703703703705) internal successors, (484), 433 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 484 transitions. [2024-11-13 12:46:37,611 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 484 transitions. Word has length 80 [2024-11-13 12:46:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:37,611 INFO L471 AbstractCegarLoop]: Abstraction has 434 states and 484 transitions. [2024-11-13 12:46:37,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.073170731707317) internal successors, (167), 42 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:46:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 484 transitions. [2024-11-13 12:46:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-13 12:46:37,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:37,613 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:37,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 12:46:37,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-13 12:46:37,813 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:46:37,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1512225972, now seen corresponding path program 6 times [2024-11-13 12:46:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761179348] [2024-11-13 12:46:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:46:38,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761179348] [2024-11-13 12:46:38,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761179348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:38,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677618290] [2024-11-13 12:46:38,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:46:38,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:38,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:38,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 12:46:39,014 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 12:46:39,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:39,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 12:46:39,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:39,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:46:39,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:46:39,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 12:46:39,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:46:39,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-13 12:46:40,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:46:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 50 proven. 82 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:40,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:41,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2024-11-13 12:46:41,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-13 12:47:20,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2024-11-13 12:47:20,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 838 treesize of output 822 [2024-11-13 12:47:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 49 proven. 80 refuted. 1 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:47:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677618290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:21,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:21,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 27] total 66 [2024-11-13 12:47:21,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366361740] [2024-11-13 12:47:21,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:21,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-13 12:47:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-13 12:47:21,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4024, Unknown=8, NotChecked=0, Total=4290 [2024-11-13 12:47:21,005 INFO L87 Difference]: Start difference. First operand 434 states and 484 transitions. Second operand has 66 states, 66 states have (on average 3.242424242424242) internal successors, (214), 66 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:24,903 INFO L93 Difference]: Finished difference Result 499 states and 553 transitions. [2024-11-13 12:47:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:47:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.242424242424242) internal successors, (214), 66 states have internal predecessors, (214), 0 states have call successors, (0), 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 83 [2024-11-13 12:47:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:24,904 INFO L225 Difference]: With dead ends: 499 [2024-11-13 12:47:24,904 INFO L226 Difference]: Without dead ends: 499 [2024-11-13 12:47:24,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=619, Invalid=8493, Unknown=8, NotChecked=0, Total=9120 [2024-11-13 12:47:24,905 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:24,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 775 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 12:47:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-11-13 12:47:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2024-11-13 12:47:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.1157894736842104) internal successors, (530), 476 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 530 transitions. [2024-11-13 12:47:24,912 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 530 transitions. Word has length 83 [2024-11-13 12:47:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:24,913 INFO L471 AbstractCegarLoop]: Abstraction has 477 states and 530 transitions. [2024-11-13 12:47:24,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.242424242424242) internal successors, (214), 66 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 530 transitions. [2024-11-13 12:47:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-13 12:47:24,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:24,914 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:24,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 12:47:25,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-13 12:47:25,115 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:47:25,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1130473502, now seen corresponding path program 8 times [2024-11-13 12:47:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:47:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514723066] [2024-11-13 12:47:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:25,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:47:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 12 proven. 118 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:25,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:47:25,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514723066] [2024-11-13 12:47:25,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514723066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:47:25,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506153971] [2024-11-13 12:47:25,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:47:25,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:25,635 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:25,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 12:47:25,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:47:25,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:47:25,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 12:47:25,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 22 proven. 108 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:26,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:26,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:47:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 22 proven. 108 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:26,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506153971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:26,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:26,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2024-11-13 12:47:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464543725] [2024-11-13 12:47:26,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:26,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 12:47:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 12:47:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 12:47:26,989 INFO L87 Difference]: Start difference. First operand 477 states and 530 transitions. Second operand has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:27,965 INFO L93 Difference]: Finished difference Result 541 states and 596 transitions. [2024-11-13 12:47:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 12:47:27,966 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 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 84 [2024-11-13 12:47:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:27,968 INFO L225 Difference]: With dead ends: 541 [2024-11-13 12:47:27,968 INFO L226 Difference]: Without dead ends: 541 [2024-11-13 12:47:27,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 12:47:27,968 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 97 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:27,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 798 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:47:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-13 12:47:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 481. [2024-11-13 12:47:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 479 states have (on average 1.11482254697286) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2024-11-13 12:47:27,975 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 84 [2024-11-13 12:47:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:27,975 INFO L471 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2024-11-13 12:47:27,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.605263157894737) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2024-11-13 12:47:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-13 12:47:27,976 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:27,976 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:27,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-13 12:47:28,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-13 12:47:28,177 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:47:28,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -313508412, now seen corresponding path program 7 times [2024-11-13 12:47:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:47:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261247686] [2024-11-13 12:47:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:47:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:47:29,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:47:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261247686] [2024-11-13 12:47:29,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261247686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:47:29,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350711822] [2024-11-13 12:47:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:47:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:29,283 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:29,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 12:47:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:29,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 12:47:29,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:29,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:47:30,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:47:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 94 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:30,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:30,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:47:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:47:30,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:47:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 94 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:30,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350711822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:30,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:30,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 43 [2024-11-13 12:47:30,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774718461] [2024-11-13 12:47:30,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:30,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 12:47:30,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 12:47:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 12:47:30,372 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:31,806 INFO L93 Difference]: Finished difference Result 599 states and 661 transitions. [2024-11-13 12:47:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 12:47:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 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 85 [2024-11-13 12:47:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:31,808 INFO L225 Difference]: With dead ends: 599 [2024-11-13 12:47:31,808 INFO L226 Difference]: Without dead ends: 599 [2024-11-13 12:47:31,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=2950, Unknown=0, NotChecked=0, Total=3192 [2024-11-13 12:47:31,809 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:31,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1155 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 12:47:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2024-11-13 12:47:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 499. [2024-11-13 12:47:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 497 states have (on average 1.1146881287726358) internal successors, (554), 498 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 554 transitions. [2024-11-13 12:47:31,817 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 554 transitions. Word has length 85 [2024-11-13 12:47:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:31,817 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 554 transitions. [2024-11-13 12:47:31,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 554 transitions. [2024-11-13 12:47:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-13 12:47:31,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:31,819 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:31,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 12:47:32,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-13 12:47:32,020 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:47:32,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -75811878, now seen corresponding path program 8 times [2024-11-13 12:47:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:47:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742603347] [2024-11-13 12:47:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:47:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:47:32,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:47:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742603347] [2024-11-13 12:47:32,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742603347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:47:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448154193] [2024-11-13 12:47:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:47:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:32,681 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 12:47:32,887 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:47:32,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:47:32,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 12:47:32,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:33,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:47:33,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:47:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:47:33,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:33,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:47:33,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:47:33,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:47:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:47:33,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448154193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:33,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:33,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2024-11-13 12:47:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647355367] [2024-11-13 12:47:33,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:33,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 12:47:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 12:47:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:47:33,636 INFO L87 Difference]: Start difference. First operand 499 states and 554 transitions. Second operand has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:34,692 INFO L93 Difference]: Finished difference Result 643 states and 709 transitions. [2024-11-13 12:47:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:47:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 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 86 [2024-11-13 12:47:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:34,694 INFO L225 Difference]: With dead ends: 643 [2024-11-13 12:47:34,694 INFO L226 Difference]: Without dead ends: 643 [2024-11-13 12:47:34,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=2342, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 12:47:34,695 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 57 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:34,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1272 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 12:47:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-11-13 12:47:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 594. [2024-11-13 12:47:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 592 states have (on average 1.1097972972972974) internal successors, (657), 593 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 657 transitions. [2024-11-13 12:47:34,704 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 657 transitions. Word has length 86 [2024-11-13 12:47:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:34,704 INFO L471 AbstractCegarLoop]: Abstraction has 594 states and 657 transitions. [2024-11-13 12:47:34,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.210526315789474) internal successors, (122), 38 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 657 transitions. [2024-11-13 12:47:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-13 12:47:34,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:34,706 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:34,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 12:47:34,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-13 12:47:34,906 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:47:34,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1097552227, now seen corresponding path program 9 times [2024-11-13 12:47:34,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:47:34,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387179379] [2024-11-13 12:47:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:34,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:47:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 140 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:47:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387179379] [2024-11-13 12:47:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387179379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:47:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966846296] [2024-11-13 12:47:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:47:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:35,672 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:35,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 12:47:35,996 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-13 12:47:35,996 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:47:35,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-13 12:47:36,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:36,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 12:47:37,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:47:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:47:37,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:37,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:47:37,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:47:37,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:47:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 6 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:47:38,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966846296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:38,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31, 26] total 66 [2024-11-13 12:47:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439052332] [2024-11-13 12:47:38,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:38,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-13 12:47:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-13 12:47:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4031, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 12:47:38,408 INFO L87 Difference]: Start difference. First operand 594 states and 657 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:40,965 INFO L93 Difference]: Finished difference Result 723 states and 798 transitions. [2024-11-13 12:47:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 12:47:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 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 87 [2024-11-13 12:47:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:40,968 INFO L225 Difference]: With dead ends: 723 [2024-11-13 12:47:40,968 INFO L226 Difference]: Without dead ends: 723 [2024-11-13 12:47:40,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=455, Invalid=7201, Unknown=0, NotChecked=0, Total=7656 [2024-11-13 12:47:40,968 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 155 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:40,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1136 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 12:47:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2024-11-13 12:47:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 662. [2024-11-13 12:47:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 660 states have (on average 1.1106060606060606) internal successors, (733), 661 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 733 transitions. [2024-11-13 12:47:40,978 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 733 transitions. Word has length 87 [2024-11-13 12:47:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:40,979 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 733 transitions. [2024-11-13 12:47:40,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 66 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 733 transitions. [2024-11-13 12:47:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-13 12:47:40,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:40,980 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:41,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 12:47:41,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 12:47:41,181 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:47:41,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1395933906, now seen corresponding path program 9 times [2024-11-13 12:47:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:47:41,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892637959] [2024-11-13 12:47:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:41,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:47:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-13 12:47:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:47:41,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892637959] [2024-11-13 12:47:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892637959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:47:41,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934545383] [2024-11-13 12:47:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:47:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:41,654 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:41,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 12:47:41,910 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 12:47:41,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:47:41,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 12:47:41,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:42,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:47:44,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:47:44,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-13 12:47:47,727 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-13 12:47:47,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2024-11-13 12:47:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 23 proven. 102 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 12:47:48,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:49,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:47:49,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2024-11-13 12:47:50,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-11-13 12:47:50,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 12:47:50,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:47:50,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2024-11-13 12:47:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-13 12:47:51,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934545383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:51,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:47:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 26] total 64 [2024-11-13 12:47:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38645701] [2024-11-13 12:47:51,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:51,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-13 12:47:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:47:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-13 12:47:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3784, Unknown=1, NotChecked=0, Total=4160 [2024-11-13 12:47:51,388 INFO L87 Difference]: Start difference. First operand 662 states and 733 transitions. Second operand has 65 states, 64 states have (on average 3.25) internal successors, (208), 65 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:47:57,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:48:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:47,539 INFO L93 Difference]: Finished difference Result 794 states and 869 transitions. [2024-11-13 12:48:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-11-13 12:48:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.25) internal successors, (208), 65 states have internal predecessors, (208), 0 states have call successors, (0), 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 88 [2024-11-13 12:48:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:47,541 INFO L225 Difference]: With dead ends: 794 [2024-11-13 12:48:47,541 INFO L226 Difference]: Without dead ends: 794 [2024-11-13 12:48:47,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14228 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=4945, Invalid=39775, Unknown=12, NotChecked=0, Total=44732 [2024-11-13 12:48:47,542 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 413 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 3440 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:47,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 459 Invalid, 3542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3440 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-13 12:48:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2024-11-13 12:48:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 676. [2024-11-13 12:48:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 674 states have (on average 1.1112759643916914) internal successors, (749), 675 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:48:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 749 transitions. [2024-11-13 12:48:47,555 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 749 transitions. Word has length 88 [2024-11-13 12:48:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:47,555 INFO L471 AbstractCegarLoop]: Abstraction has 676 states and 749 transitions. [2024-11-13 12:48:47,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.25) internal successors, (208), 65 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:48:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 749 transitions. [2024-11-13 12:48:47,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-13 12:48:47,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:47,558 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:47,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 12:48:47,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-13 12:48:47,759 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:48:47,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1377292428, now seen corresponding path program 10 times [2024-11-13 12:48:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:48:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078532604] [2024-11-13 12:48:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:47,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:48:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:48:48,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:48:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078532604] [2024-11-13 12:48:48,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078532604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:48:48,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880088299] [2024-11-13 12:48:48,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:48:48,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:48,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:48,343 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 12:48:48,623 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:48:48,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:48:48,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-13 12:48:48,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:48,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:48:53,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:48:53,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 70 [2024-11-13 12:48:53,852 INFO L349 Elim1Store]: treesize reduction 16, result has 71.4 percent of original size [2024-11-13 12:48:53,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 62 [2024-11-13 12:48:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 75 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 12:48:54,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:56,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:48:56,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 71 [2024-11-13 12:48:57,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2024-11-13 12:48:58,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2024-11-13 12:48:58,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-13 12:48:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-13 12:48:58,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880088299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:48:58,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:48:58,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33, 32] total 76 [2024-11-13 12:48:58,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344907943] [2024-11-13 12:48:58,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:58,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-13 12:48:58,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:48:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-13 12:48:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=5340, Unknown=0, NotChecked=0, Total=5852 [2024-11-13 12:48:58,073 INFO L87 Difference]: Start difference. First operand 676 states and 749 transitions. Second operand has 77 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 77 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:52:32,587 INFO L93 Difference]: Finished difference Result 914 states and 996 transitions. [2024-11-13 12:52:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2024-11-13 12:52:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 77 states have internal predecessors, (194), 0 states have call successors, (0), 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 89 [2024-11-13 12:52:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:52:32,589 INFO L225 Difference]: With dead ends: 914 [2024-11-13 12:52:32,589 INFO L226 Difference]: Without dead ends: 568 [2024-11-13 12:52:32,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16432 ImplicationChecksByTransitivity, 213.1s TimeCoverageRelationStatistics Valid=8146, Invalid=49212, Unknown=2, NotChecked=0, Total=57360 [2024-11-13 12:52:32,591 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 331 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 6133 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 6182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:52:32,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 687 Invalid, 6182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 6133 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-13 12:52:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-11-13 12:52:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 382. [2024-11-13 12:52:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.105263157894737) internal successors, (420), 381 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 420 transitions. [2024-11-13 12:52:32,597 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 420 transitions. Word has length 89 [2024-11-13 12:52:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:52:32,597 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 420 transitions. [2024-11-13 12:52:32,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.5526315789473686) internal successors, (194), 77 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:52:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 420 transitions. [2024-11-13 12:52:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-13 12:52:32,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:52:32,599 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:52:32,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 12:52:32,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-13 12:52:32,800 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:52:32,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:52:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1100854543, now seen corresponding path program 10 times [2024-11-13 12:52:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:52:32,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764447771] [2024-11-13 12:52:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:52:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:52:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:52:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 26 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:52:34,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:52:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764447771] [2024-11-13 12:52:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764447771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:52:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722148909] [2024-11-13 12:52:34,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:52:34,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:52:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:52:34,123 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:52:34,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 12:52:34,414 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:52:34,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:52:34,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 12:52:34,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:52:34,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:52:48,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:48,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-13 12:52:51,428 INFO L349 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2024-11-13 12:52:51,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2024-11-13 12:52:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 37 proven. 100 refuted. 9 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:52:51,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:52:54,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:54,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2024-11-13 12:52:54,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-11-13 12:52:54,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:52:54,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 67 [2024-11-13 12:52:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 71 proven. 75 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:52:55,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722148909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:52:55,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:52:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 41, 40] total 96 [2024-11-13 12:52:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216357727] [2024-11-13 12:52:55,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:52:55,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-13 12:52:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:52:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-13 12:52:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=8377, Unknown=14, NotChecked=0, Total=9120 [2024-11-13 12:52:55,551 INFO L87 Difference]: Start difference. First operand 382 states and 420 transitions. Second operand has 96 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:53:06,069 INFO L93 Difference]: Finished difference Result 725 states and 794 transitions. [2024-11-13 12:53:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-13 12:53:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 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 90 [2024-11-13 12:53:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:53:06,071 INFO L225 Difference]: With dead ends: 725 [2024-11-13 12:53:06,071 INFO L226 Difference]: Without dead ends: 404 [2024-11-13 12:53:06,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=2041, Invalid=21201, Unknown=14, NotChecked=0, Total=23256 [2024-11-13 12:53:06,072 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:53:06,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 279 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3285 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 12:53:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-13 12:53:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2024-11-13 12:53:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 392 states have (on average 1.1020408163265305) internal successors, (432), 393 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 432 transitions. [2024-11-13 12:53:06,077 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 432 transitions. Word has length 90 [2024-11-13 12:53:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:53:06,077 INFO L471 AbstractCegarLoop]: Abstraction has 394 states and 432 transitions. [2024-11-13 12:53:06,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.15625) internal successors, (207), 96 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:06,080 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 432 transitions. [2024-11-13 12:53:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-13 12:53:06,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:53:06,082 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:06,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 12:53:06,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-13 12:53:06,282 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:53:06,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash -850014425, now seen corresponding path program 11 times [2024-11-13 12:53:06,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:06,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287504271] [2024-11-13 12:53:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287504271] [2024-11-13 12:53:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287504271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73816186] [2024-11-13 12:53:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:53:06,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:06,788 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:06,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 12:53:07,081 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-13 12:53:07,081 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:07,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 12:53:07,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:07,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 12:53:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 35 proven. 127 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:07,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 35 proven. 127 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73816186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:08,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2024-11-13 12:53:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370948049] [2024-11-13 12:53:08,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:08,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 12:53:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 12:53:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 12:53:08,663 INFO L87 Difference]: Start difference. First operand 394 states and 432 transitions. Second operand has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:53:09,920 INFO L93 Difference]: Finished difference Result 471 states and 516 transitions. [2024-11-13 12:53:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 12:53:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 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 93 [2024-11-13 12:53:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:53:09,922 INFO L225 Difference]: With dead ends: 471 [2024-11-13 12:53:09,922 INFO L226 Difference]: Without dead ends: 471 [2024-11-13 12:53:09,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=2667, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 12:53:09,923 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 116 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:53:09,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 551 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 12:53:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-13 12:53:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 404. [2024-11-13 12:53:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 402 states have (on average 1.1044776119402986) internal successors, (444), 403 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 444 transitions. [2024-11-13 12:53:09,930 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 444 transitions. Word has length 93 [2024-11-13 12:53:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:53:09,930 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 444 transitions. [2024-11-13 12:53:09,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 444 transitions. [2024-11-13 12:53:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-13 12:53:09,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:53:09,932 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:09,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 12:53:10,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:10,133 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:53:10,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2113826195, now seen corresponding path program 9 times [2024-11-13 12:53:10,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:10,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519638588] [2024-11-13 12:53:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:10,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 22 proven. 164 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:10,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:10,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519638588] [2024-11-13 12:53:10,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519638588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:10,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819462631] [2024-11-13 12:53:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:53:10,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:10,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:10,719 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:10,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 12:53:11,161 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-13 12:53:11,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:11,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 12:53:11,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 35 proven. 151 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:11,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:12,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:53:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 35 proven. 151 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:12,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819462631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:12,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:12,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2024-11-13 12:53:12,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597159411] [2024-11-13 12:53:12,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:12,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 12:53:12,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:12,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 12:53:12,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1715, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 12:53:12,746 INFO L87 Difference]: Start difference. First operand 404 states and 444 transitions. Second operand has 45 states, 44 states have (on average 4.818181818181818) internal successors, (212), 45 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:53:14,292 INFO L93 Difference]: Finished difference Result 427 states and 467 transitions. [2024-11-13 12:53:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 12:53:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.818181818181818) internal successors, (212), 45 states have internal predecessors, (212), 0 states have call successors, (0), 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 97 [2024-11-13 12:53:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:53:14,294 INFO L225 Difference]: With dead ends: 427 [2024-11-13 12:53:14,294 INFO L226 Difference]: Without dead ends: 427 [2024-11-13 12:53:14,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 159 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 12:53:14,295 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 213 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:53:14,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 993 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 12:53:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-11-13 12:53:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 408. [2024-11-13 12:53:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.103448275862069) internal successors, (448), 407 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 448 transitions. [2024-11-13 12:53:14,302 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 448 transitions. Word has length 97 [2024-11-13 12:53:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:53:14,302 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 448 transitions. [2024-11-13 12:53:14,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.818181818181818) internal successors, (212), 45 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 448 transitions. [2024-11-13 12:53:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-13 12:53:14,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:53:14,304 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:53:14,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 12:53:14,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:14,504 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:53:14,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:53:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash -185659212, now seen corresponding path program 12 times [2024-11-13 12:53:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:53:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769592330] [2024-11-13 12:53:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:53:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:53:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:53:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 7 proven. 198 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:53:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769592330] [2024-11-13 12:53:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769592330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:53:15,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482046186] [2024-11-13 12:53:15,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:53:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:53:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:53:15,555 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:53:15,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 12:53:16,036 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-13 12:53:16,036 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:53:16,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-13 12:53:16,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:53:16,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:53:18,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:53:18,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-13 12:53:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 35 proven. 170 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:18,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:53:21,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 12:53:21,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-13 12:53:21,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:53:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 35 proven. 170 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:53:21,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482046186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:53:21,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:53:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 61 [2024-11-13 12:53:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015450578] [2024-11-13 12:53:21,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:53:21,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 12:53:21,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:53:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 12:53:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3385, Unknown=0, NotChecked=0, Total=3660 [2024-11-13 12:53:21,492 INFO L87 Difference]: Start difference. First operand 408 states and 448 transitions. Second operand has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:53:54,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:54:07,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:54:19,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:54:32,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:54:43,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:54:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:54:43,577 INFO L93 Difference]: Finished difference Result 580 states and 635 transitions. [2024-11-13 12:54:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-13 12:54:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 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 100 [2024-11-13 12:54:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:54:43,579 INFO L225 Difference]: With dead ends: 580 [2024-11-13 12:54:43,579 INFO L226 Difference]: Without dead ends: 580 [2024-11-13 12:54:43,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=1124, Invalid=10422, Unknown=10, NotChecked=0, Total=11556 [2024-11-13 12:54:43,580 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 322 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 4257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:54:43,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1122 Invalid, 4257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 4241 Invalid, 5 Unknown, 0 Unchecked, 23.8s Time] [2024-11-13 12:54:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-11-13 12:54:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 454. [2024-11-13 12:54:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 452 states have (on average 1.1039823008849559) internal successors, (499), 453 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 499 transitions. [2024-11-13 12:54:43,588 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 499 transitions. Word has length 100 [2024-11-13 12:54:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:54:43,588 INFO L471 AbstractCegarLoop]: Abstraction has 454 states and 499 transitions. [2024-11-13 12:54:43,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:54:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 499 transitions. [2024-11-13 12:54:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-13 12:54:43,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:54:43,590 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:54:43,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-13 12:54:43,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:43,790 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:54:43,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:54:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 209377708, now seen corresponding path program 10 times [2024-11-13 12:54:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:54:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625431585] [2024-11-13 12:54:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:54:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:54:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:54:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 35 proven. 217 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:54:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:54:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625431585] [2024-11-13 12:54:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625431585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:54:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71334877] [2024-11-13 12:54:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:54:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:54:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:54:44,576 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:54:44,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 12:54:44,907 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:54:44,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:54:44,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 12:54:44,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:54:45,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-13 12:55:30,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:30,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 58 [2024-11-13 12:55:31,718 INFO L349 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2024-11-13 12:55:31,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 58 [2024-11-13 12:55:31,720 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-13 12:55:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 65 proven. 144 refuted. 22 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-13 12:55:31,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:38,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:38,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 58 [2024-11-13 12:55:39,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2024-11-13 12:55:39,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:55:39,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 78 [2024-11-13 12:55:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 84 proven. 147 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-13 12:55:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71334877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:41,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:41,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 49, 48] total 109 [2024-11-13 12:55:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821199516] [2024-11-13 12:55:41,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:41,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-13 12:55:41,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-13 12:55:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=860, Invalid=10872, Unknown=40, NotChecked=0, Total=11772 [2024-11-13 12:55:41,251 INFO L87 Difference]: Start difference. First operand 454 states and 499 transitions. Second operand has 109 states, 109 states have (on average 2.238532110091743) internal successors, (244), 109 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:56:35,430 INFO L93 Difference]: Finished difference Result 907 states and 992 transitions. [2024-11-13 12:56:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2024-11-13 12:56:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.238532110091743) internal successors, (244), 109 states have internal predecessors, (244), 0 states have call successors, (0), 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 107 [2024-11-13 12:56:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:56:35,432 INFO L225 Difference]: With dead ends: 907 [2024-11-13 12:56:35,432 INFO L226 Difference]: Without dead ends: 504 [2024-11-13 12:56:35,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 16361 ImplicationChecksByTransitivity, 94.1s TimeCoverageRelationStatistics Valid=4426, Invalid=50994, Unknown=40, NotChecked=0, Total=55460 [2024-11-13 12:56:35,435 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 221 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 9142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 9148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2024-11-13 12:56:35,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 910 Invalid, 9148 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 9142 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2024-11-13 12:56:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-13 12:56:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 473. [2024-11-13 12:56:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.099787685774947) internal successors, (518), 472 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 518 transitions. [2024-11-13 12:56:35,440 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 518 transitions. Word has length 107 [2024-11-13 12:56:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:56:35,441 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 518 transitions. [2024-11-13 12:56:35,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.238532110091743) internal successors, (244), 109 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 518 transitions. [2024-11-13 12:56:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-13 12:56:35,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:56:35,442 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:35,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 12:56:35,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:35,643 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:56:35,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:35,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1031193661, now seen corresponding path program 13 times [2024-11-13 12:56:35,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:35,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786407690] [2024-11-13 12:56:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 8 proven. 266 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 12:56:37,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:37,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786407690] [2024-11-13 12:56:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786407690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269126699] [2024-11-13 12:56:37,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:56:37,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:37,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:37,033 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:37,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 12:56:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:37,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 12:56:37,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:37,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:56:38,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 12:56:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 8 proven. 266 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 12:56:38,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:38,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 12:56:38,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:56:38,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:56:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 8 proven. 266 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-13 12:56:38,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269126699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:38,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:38,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2024-11-13 12:56:38,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565019549] [2024-11-13 12:56:38,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:38,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 12:56:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 12:56:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2122, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 12:56:38,980 INFO L87 Difference]: Start difference. First operand 473 states and 518 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:56:42,087 INFO L93 Difference]: Finished difference Result 579 states and 633 transitions. [2024-11-13 12:56:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 12:56:42,088 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 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 113 [2024-11-13 12:56:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:56:42,089 INFO L225 Difference]: With dead ends: 579 [2024-11-13 12:56:42,089 INFO L226 Difference]: Without dead ends: 579 [2024-11-13 12:56:42,090 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=282, Invalid=4410, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 12:56:42,090 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 103 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:56:42,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 2583 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 12:56:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2024-11-13 12:56:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 512. [2024-11-13 12:56:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 510 states have (on average 1.0980392156862746) internal successors, (560), 511 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 560 transitions. [2024-11-13 12:56:42,097 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 560 transitions. Word has length 113 [2024-11-13 12:56:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:56:42,097 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 560 transitions. [2024-11-13 12:56:42,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 560 transitions. [2024-11-13 12:56:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-13 12:56:42,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:56:42,098 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:42,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 12:56:42,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:42,299 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:56:42,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -62767151, now seen corresponding path program 14 times [2024-11-13 12:56:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:42,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779402480] [2024-11-13 12:56:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 36 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779402480] [2024-11-13 12:56:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779402480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592169341] [2024-11-13 12:56:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:56:44,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:44,659 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:44,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 12:56:45,002 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:56:45,002 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:45,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-13 12:56:45,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:45,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 12:56:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 36 proven. 238 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:45,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:46,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-13 12:56:46,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 12:56:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 36 proven. 238 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:46,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592169341] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:46,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:46,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 24] total 48 [2024-11-13 12:56:46,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100557844] [2024-11-13 12:56:46,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:46,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 12:56:46,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 12:56:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 12:56:46,384 INFO L87 Difference]: Start difference. First operand 512 states and 560 transitions. Second operand has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:56:50,147 INFO L93 Difference]: Finished difference Result 1012 states and 1110 transitions. [2024-11-13 12:56:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 12:56:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 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 116 [2024-11-13 12:56:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:56:50,149 INFO L225 Difference]: With dead ends: 1012 [2024-11-13 12:56:50,149 INFO L226 Difference]: Without dead ends: 544 [2024-11-13 12:56:50,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=291, Invalid=4821, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 12:56:50,150 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 177 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 3179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:56:50,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1415 Invalid, 3179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 12:56:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-11-13 12:56:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 530. [2024-11-13 12:56:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 528 states have (on average 1.0946969696969697) internal successors, (578), 529 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 578 transitions. [2024-11-13 12:56:50,159 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 578 transitions. Word has length 116 [2024-11-13 12:56:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:56:50,160 INFO L471 AbstractCegarLoop]: Abstraction has 530 states and 578 transitions. [2024-11-13 12:56:50,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 578 transitions. [2024-11-13 12:56:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-13 12:56:50,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:56:50,161 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:50,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 12:56:50,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:50,361 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:56:50,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:50,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1089486727, now seen corresponding path program 15 times [2024-11-13 12:56:50,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:50,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951381913] [2024-11-13 12:56:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:50,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 51 proven. 245 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:51,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:51,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951381913] [2024-11-13 12:56:51,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951381913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:51,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486694105] [2024-11-13 12:56:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:56:51,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:51,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:51,579 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:51,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 12:56:52,174 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-13 12:56:52,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:52,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 12:56:52,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 70 proven. 226 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:53,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:54,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 12:56:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 70 proven. 226 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:54,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486694105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:54,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:54,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2024-11-13 12:56:54,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592949224] [2024-11-13 12:56:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:54,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-13 12:56:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-13 12:56:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 12:56:54,556 INFO L87 Difference]: Start difference. First operand 530 states and 578 transitions. Second operand has 56 states, 55 states have (on average 4.6) internal successors, (253), 56 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:56:55,950 INFO L93 Difference]: Finished difference Result 700 states and 766 transitions. [2024-11-13 12:56:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 12:56:55,951 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.6) internal successors, (253), 56 states have internal predecessors, (253), 0 states have call successors, (0), 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 119 [2024-11-13 12:56:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:56:55,952 INFO L225 Difference]: With dead ends: 700 [2024-11-13 12:56:55,953 INFO L226 Difference]: Without dead ends: 700 [2024-11-13 12:56:55,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 195 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=609, Invalid=3813, Unknown=0, NotChecked=0, Total=4422 [2024-11-13 12:56:55,953 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 281 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:56:55,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 655 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 12:56:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2024-11-13 12:56:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 540. [2024-11-13 12:56:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.096654275092937) internal successors, (590), 539 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 590 transitions. [2024-11-13 12:56:55,964 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 590 transitions. Word has length 119 [2024-11-13 12:56:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:56:55,964 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 590 transitions. [2024-11-13 12:56:55,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.6) internal successors, (253), 56 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 590 transitions. [2024-11-13 12:56:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-13 12:56:55,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:56:55,966 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:55,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 12:56:56,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-13 12:56:56,167 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:56:56,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash -936586547, now seen corresponding path program 11 times [2024-11-13 12:56:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781291121] [2024-11-13 12:56:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:56,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 51 proven. 277 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:57,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:57,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781291121] [2024-11-13 12:56:57,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781291121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:57,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416663076] [2024-11-13 12:56:57,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:56:57,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:57,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:57,138 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:57,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 12:56:57,811 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-13 12:56:57,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:57,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 12:56:57,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 70 proven. 258 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:56:58,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:00,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-13 12:57:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 70 proven. 258 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-13 12:57:00,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416663076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:00,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2024-11-13 12:57:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140462922] [2024-11-13 12:57:00,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:00,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-13 12:57:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-13 12:57:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 12:57:00,697 INFO L87 Difference]: Start difference. First operand 540 states and 590 transitions. Second operand has 54 states, 53 states have (on average 4.60377358490566) internal successors, (244), 54 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:57:03,211 INFO L93 Difference]: Finished difference Result 567 states and 617 transitions. [2024-11-13 12:57:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 12:57:03,212 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.60377358490566) internal successors, (244), 54 states have internal predecessors, (244), 0 states have call successors, (0), 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 123 [2024-11-13 12:57:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:57:03,214 INFO L225 Difference]: With dead ends: 567 [2024-11-13 12:57:03,214 INFO L226 Difference]: Without dead ends: 567 [2024-11-13 12:57:03,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=497, Invalid=3663, Unknown=0, NotChecked=0, Total=4160 [2024-11-13 12:57:03,214 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 261 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:57:03,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1342 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 12:57:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-11-13 12:57:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 544. [2024-11-13 12:57:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.0959409594095941) internal successors, (594), 543 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 594 transitions. [2024-11-13 12:57:03,220 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 594 transitions. Word has length 123 [2024-11-13 12:57:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:57:03,220 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 594 transitions. [2024-11-13 12:57:03,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.60377358490566) internal successors, (244), 54 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 594 transitions. [2024-11-13 12:57:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-13 12:57:03,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:57:03,221 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:03,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-13 12:57:03,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:03,422 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-13 12:57:03,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1742244780, now seen corresponding path program 16 times [2024-11-13 12:57:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:03,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303154225] [2024-11-13 12:57:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:03,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 41 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:06,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303154225] [2024-11-13 12:57:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303154225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657631262] [2024-11-13 12:57:06,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:57:06,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:06,989 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d3cf3a-bee3-407d-b86e-7918683839ed/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 12:57:07,381 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:57:07,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:07,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-13 12:57:07,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:08,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10